Prism self-adjusting mechanism

Abstract

The utility model provides a kind of prism automatic adjusting mechanism, including drive module, cantilever, prism unit and Zhang Ding block, the prism unit includes two prisms, two rotating blocks and elastic connecting piece, two the prism is connected to two rotating block below respectively, the elastic connecting piece is connected between two rotating block, the prism unit is set in the cantilever by slider activity, the Zhang Ding block is set in the cantilever by baffle, the Zhang Ding block is guiding top angle relative to one end of the prism unit, the slider is connected drive module by crank assembly, drive module is as power source to drive the slider and the prism unit to the guiding top angle of Zhang Ding block advance or away, advance the guiding top angle and open two rotating block, and then drive two prisms to change angle. It can be automatically, accurately, flexible adjust prism angle, and compact structure is suitable for small space.

Description

Technical Field

[0001] This utility model relates to the field of optics, and in particular to an automatic prism adjustment mechanism. Background Technology

[0002] In optical systems, prism angle adjustment is a crucial step. Traditional prism angle adjustment methods often have limitations, such as low precision in manual adjustment, difficulty in achieving dynamic real-time adjustment, and inability to meet the requirements of high-precision optical systems. Scenarios requiring rapid changes in the optical path or precise control of the beam angle, especially in miniaturized inspection scenarios, present unique challenges: In the semiconductor and microelectronics fields, full inspection of microchips requires the placement of light sources within millimeter-scale spaces. Traditional direct-light sources are difficult to install due to size limitations, and the optical path is easily obstructed, leading to uneven illumination and decreased yield in CCD inspection. Therefore, a mechanism is needed that can automatically, accurately, and flexibly adjust the prism angle and solve the problem of light source placement in confined spaces to improve inspection accuracy and efficiency, and increase inspection yield. Utility Model Content

[0003] In view of the above, this utility model provides an automatic prism adjustment mechanism that can automatically, accurately and flexibly adjust the prism angle, and has a compact structure suitable for confined spaces.

[0004] The present invention specifically adopts the following technical solution: an automatic prism adjustment mechanism, comprising a drive module, a cantilever, a prism unit, and a tensioning block. The prism unit includes two prisms, two rotating blocks, and an elastic connector. The two prisms are respectively connected below the two rotating blocks, and the elastic connector is connected between the two rotating blocks. The prism unit is movably mounted on the cantilever via a slider. The tensioning block is mounted on the cantilever via a baffle. One end of the tensioning block relative to the prism unit is a guide apex angle. The slider is connected to the drive module via a crank assembly. The drive module acts as a power source to drive the slider and the prism unit toward or away from the guide apex angle of the tensioning block. When advancing, the guide apex angle pushes open the two rotating blocks, thereby causing the two prisms to change their angle.

[0005] As a further improved technical solution, the prism unit is disposed on one side of the slider via a connecting seat. The connecting seat is provided with a partition strip, and the rotating block is movably disposed on both sides of the partition strip. Each of the connecting seats on both sides of the partition strip is provided with a hole. The rotating block is connected to the prism via a connecting rod. The connecting rod passes through the hole, with its upper end connected to the rotating block and its lower end connected to the prism.

[0006] As a further improved technical solution, a hook seat is provided in the middle of the top surface of the rotating block, and the two ends of the elastic connector are fixed on the hook seat.

[0007] As a further improved technical solution, a roller is provided at one end of the rotating block near the top block. When the rotating block contacts the top block, one end of the rollers of the two rotating blocks moves along the two sides of the guide apex.

[0008] As a further improved technical solution, the lower end of the connecting rod has a recessed area, the prism is inserted into the groove at the bottom of the recessed area, and the top of the prism is pressed and locked by a screw or a screw plus a washer.

[0009] As a further improved technical solution, the crank assembly includes a crank and a push rod, the crank and the push rod are movably connected by a coupling, the crank is connected to the drive module, the push rod is connected to one end of the slider, and a strip-shaped movable groove is formed on the push rod, and the coupling slides in the strip-shaped movable groove.

[0010] As a further improved technical solution, the drive module includes a motor, an encoder, and a commutation mechanism. The crank, the motor, and the encoder are located at three positions of the commutation mechanism. The commutation mechanism converts the transmission of the motor by 90 degrees and then outputs the output to drive the crank to move.

[0011] An automatic prism adjustment mechanism includes the aforementioned drive module, cantilever, two sets of prism units, and two tension blocks. The two sets of prism units are respectively disposed on both sides of the cantilever via two sliders. The two sliders have racks on their opposite sidewalls, and a synchronous gear meshes between the two racks, causing the two prism units to move synchronously and alternately.

[0012] As a further improved technical solution, the two tension blocks are located on both sides of the cantilever.

[0013] This utility model discloses an automatic prism adjustment mechanism with a compact structure, capable of automatically, accurately, and flexibly adjusting the prism angle. Specifically, the drive module pushes the slider to perform linear reciprocating motion via a crank assembly. The slider's movement distance is monitored in real time by an encoder and fed back to the control system. When the slider moves the prism unit toward the top block, the roller on the rotating block contacts the guide apex inclined surface of the top block. As the slider continues to advance, the roller climbs along the inclined surface, and the top block generates a lateral squeezing force on the rotating block, forcing the rotating block to rotate around the connecting rod axis, thereby causing the prism to deflect. This solution transforms linear displacement control into prism angle adjustment through the physical mapping relationship of displacement-inclined surface squeezing-angle deflection, combining the advantages of high precision, compactness, and low cost. It is especially suitable for miniaturized detection scenarios with limited space and requiring dynamic optical adjustment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the automatic prism adjustment mechanism in Example 1.

[0015] Figure 2 This is a schematic diagram of the automatic prism adjustment mechanism in Example 2.

[0016] Figure 3 This is a top view of the prism automatic adjustment mechanism structure in Example 2.

[0017] Figure 4 This is a schematic diagram of a partial structure of a prism unit. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances. Example 1

[0020] Reference Figure 1 This embodiment discloses an automatic prism adjustment mechanism, including a drive module 1, a cantilever 2, a prism unit 3, and a tension block 4. The prism unit 3 includes two prisms 31, two rotating blocks 32, and an elastic connector 33. The two prisms 31 are respectively connected to the bottom of the two rotating blocks 32, and the elastic connector 33 is connected between the two rotating blocks 32. The tension block 4 is mounted on the cantilever 2 via a baffle 5. One end of the tension block 4 relative to the prism unit 3 is a guide apex angle 41. The angle of the guide apex angle 41 can be selected between 45° and 120°. The specific angle of the guide apex angle 41 can be calculated and set in advance according to actual needs. The prism unit 3 is movably mounted on the cantilever 2 via a slider 6. The slider 6 is mounted on the cantilever 2 via a slide rail 61. The slider 6 is connected to the drive module 1 via a crank assembly 7. The drive module 1 acts as a power source to drive the slider 6 and the prism unit 3 to move towards or away from the guide apex angle of the tension block. When moving, the guide apex angle 41 pushes open the two rotating blocks 32, thereby causing the two prisms 31 to change their angle.

[0021] Specifically, in combination Figure 1 , Figure 4The prism unit 3 is mounted on one side of the slider 6 via a connecting seat 34. A partition strip 35 is provided on the connecting seat 34. A rotating block 32 is movably mounted on both sides of the partition strip 35. Holes are provided on the connecting seats 34 on both sides of the partition strip 35. The rotating block 32 is connected to the prism 31 via a connecting rod 36. The connecting rod 36 passes through the hole, with its upper end connected to the rotating block 32 and its lower end connected to the prism 31. The rotating block 32 and the connecting rod 36 form a rigid connection. During rotation, both rotate synchronously around the axis of the connecting rod 36, and the prism 31 rotates with the lower end of the connecting rod 36. A hook seat 37 is provided in the middle of the top surface of the rotating block 32. Both ends of the elastic connector 33 are fixed to the hook seat 37. In this embodiment, the elastic connector 33 is a spring. Under normal conditions, the spring is in a contracted state. After pulling the two rotating blocks 32 parallel to the sides of the partition strip 35 and adjusting them to contact the top block 4, the rotating block 32 gradually opens along the edge of the top block 4 as the contact with the top block 4 deepens, thereby driving the prism 31 below to rotate. A spring connects two rotating blocks 32, automatically resetting the angle of the prism 31 when the slider 6 retracts, eliminating return errors caused by mechanical backlash and ensuring the repeatability of angle adjustment. One end of each rotating block 32 near the top block 4 has a roller 38. When the rotating block 32 contacts the top block 4, one end of the rollers 38 of the two rotating blocks 32 moves along both sides of the guide apex 41, allowing the rotating block 32 to smoothly open along the edge of the top block 4. A buffer post is also provided on the baffle 5 on one side of the top block 4 for cushioning and protection.

[0022] The lower end of the connecting rod 36 has a recessed area 361. The prism 31 is inserted into the groove at the bottom of the recessed area 361. The top of the prism 31 is locked by a screw 362 or a screw with a washer, which also makes it easy to replace the prism 31.

[0023] Furthermore, the crank assembly 7 includes a crank 71 and a push rod 72. The crank 71 and the push rod 72 are movably connected by a coupling 73. The crank 71 is connected to the drive module 1, and the push rod 72 is connected to one end of the slider 6. Specifically, the end of the push rod 72 is connected to one end of the slider 6 via a rotary joint (such as a hinge pin or ball bearing). The connection between the two allows the push rod to rotate around the joint connection point. During this rotational movement, the push rod 72 will not displace along its own axis. A strip-shaped movable groove is provided on the push rod 72, and the coupling 73 slides within the strip-shaped movable groove. Thus, when the motor 11 drives the crank 71 to rotate, the push rod 72 moves in conjunction, and the push rod 72 drives the slider 6 to perform reciprocating linear motion.

[0024] The drive module 1 scheme includes a motor 11, an encoder 12, and a commutation mechanism 13. The crank 71, motor 11, and encoder 12 are located at three positions on the commutation mechanism 13. The commutation mechanism 13 converts the transmission of the motor 11 by 90 degrees and outputs the drive crank 71 to move. The commutation mechanism 13 in this scheme can use an existing commutator, such as a cross bevel gear commutator. The motor 11 is connected to the drive shaft of the cross bevel gear commutator, and the encoder 12 and crank 71 are respectively connected to the two ends of the output shaft of the cross bevel gear commutator. The encoder 12 is used to measure the actual motion after being transmitted through the commutation mechanism 13, thereby more accurately feeding back the movement position and distance of the crank 71, and recording the number of rotations and position of the motor 11, which is then fed back to the control system. This layout is more suitable for applications with limited space and requiring precise control of the movement distance.

[0025] In use, the motor 11 starts running, driving the crank 71 to rotate. The push rod 72 moves the slider 6 in a straight line, and the prism unit 3 moves towards the top block 4, contacts the top block 4 and continues to move along the guide apex 41, gradually changing the angle of the two rotating blocks 32, that is, changing the relative angle of the prism 31. The prism 31 refracts the light source, triggering the CCD to automatically image and take pictures. During the movement, the encoder 12 can accurately measure the movement position and distance of the crank 71, record the number of rotations of the motor 11, and feed back to the control system, so that the adjustment of the angle of the prism 31 can achieve high precision. Example 2

[0026] Combination Figures 2-3 The difference between this embodiment and Embodiment 1 is that there are two sets of prism units 3, each located on both sides of the cantilever 2 via two sliders 6. Racks 8 are provided on the opposite sidewalls of the two sliders 6, and a synchronous gear 9 meshes between the two racks 8. When one slider 6 moves, the other slider 6 naturally follows, and the directions of movement are opposite, causing the two prism units 3 to perform synchronous, staggered movements. Corresponding to the two prism units 3, two tension blocks 4 are also provided. The adjustment process of the prism units 3 on both sides of the cantilever 2 is the same, achieving the adjustment effect through staggered movement, suitable for dual-station staggered operation scenarios.

[0027] In operation, motor 11 starts running, crank 71 rotates, and on one side of cantilever 2, push rod 72 moves one of the sliders 6 in a straight line. The prism unit 3 on the slider 6 moves towards the top block 4, contacts the top block 4, and continues to move along the guide apex 41, gradually changing the angle of the two rotating blocks 32, that is, changing the relative angle of the prism 31. The prism 31 refracts the light source, triggering CCD automatic imaging and taking pictures. Since the sliders 6 on both sides are connected by rack 8 and synchronous gear 9, under the action of rack 8 and synchronous gear 9, the slider 6 and prism unit 3 on the other side of cantilever 2 also move. One prism unit 3 moves towards the top block 4, while the other prism unit 3 moves away from the top block 4 on its side. The two sets of prism units 3 on both sides adjust alternately. During the movement, encoder 12 can accurately measure the movement position and distance of crank 71, record the number of rotations of motor 11, and feed back to the control system, so that the adjustment of the angle of prism 31 can achieve high precision.

[0028] Furthermore, the above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. An automatic prism adjustment mechanism, characterized in that: The device includes a drive module, a cantilever, a prism unit, and a tensioning block. The prism unit comprises two prisms, two rotating blocks, and an elastic connector. The two prisms are respectively connected below the two rotating blocks, and the elastic connector is connected between the two rotating blocks. The prism unit is movably mounted on the cantilever via a slider. The tensioning block is mounted on the cantilever via a baffle. One end of the tensioning block opposite the prism unit is a guide apex. The slider is connected to the drive module via a crank assembly. The drive module acts as a power source, driving the slider and the prism unit to move towards or away from the guide apex of the tensioning block. During this movement, the guide apex pushes open the two rotating blocks, thereby causing the two prisms to change their angle.

2. The prism automatic adjustment mechanism according to claim 1, characterized in that: The prism unit is mounted on one side of the slider via a connecting seat. The connecting seat is provided with a partition strip. The rotating block is movably mounted on both sides of the partition strip. Each connecting seat on both sides of the partition strip has a hole. The rotating block is connected to the prism via a connecting rod. The connecting rod passes through the hole, with its upper end connected to the rotating block and its lower end connected to the prism.

3. The prism automatic adjustment mechanism according to claim 1, characterized in that: The rotating block has a hook seat in the middle of its top surface, and the two ends of the elastic connector are fixed on the hook seat.

4. The prism automatic adjustment mechanism according to claim 1, characterized in that: The rotating block is provided with a roller at one end near the top block. When the rotating block contacts the top block, one end of the rollers of the two rotating blocks moves along the two sides of the guide apex.

5. The prism automatic adjustment mechanism according to claim 2, characterized in that: The lower end of the connecting rod has a recessed area, and the prism is inserted into the groove at the bottom of the recessed area. The top of the prism is pressed and locked by a screw or a screw and a washer.

6. The prism automatic adjustment mechanism according to claim 1, characterized in that: The crank assembly includes a crank and a push rod, which are movably connected by a coupling. The crank is connected to the drive module, and the push rod is connected to one end of the slider. A strip-shaped movable groove is formed on the push rod, and the coupling slides within the strip-shaped movable groove.

7. The prism automatic adjustment mechanism according to claim 6, characterized in that: The drive module includes a motor, an encoder, and a commutation mechanism. The crank, the motor, and the encoder are located at three positions of the commutation mechanism. The commutation mechanism outputs the motor's transmission after a 90-degree change, driving the crank to move.

8. An automatic prism adjustment mechanism, characterized in that: The device includes the drive module, cantilever, two sets of prism units, and two tension blocks as described in any one of claims 1-7. The two sets of prism units are respectively disposed on both sides of the cantilever via two sliders. The two sliders have racks on their opposite sidewalls, and a synchronous gear meshes between the two racks, causing the two prism units to move synchronously and alternately.

9. The prism automatic adjustment mechanism according to claim 8, characterized in that: The two tension blocks are located on both sides of the cantilever.

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