A calibration fixture

Abstract

The utility model discloses a kind of calibration tool, it includes body, the body is installed on the focusing equipment for cooperating the calibration tool use;Positioning cavity with upper opening is formed in the body, through-hole is opened in the body, and the through-hole is communicated with the positioning cavity;Locking slot is respectively opened in the opposite sides of the body, locking member that can rotate around parallel to the axial line of the through-hole is provided on the focusing equipment, clamping end is provided on the locking member, and the locking member can rotate to the clamping end enter and be clamped in the locking slot. Compared with prior art, calibration tool can be quickly installed on focusing equipment.

Description

Technical Field

[0001] This utility model relates to the field of camera module calibration equipment, and in particular to a calibration fixture. Background Technology

[0002] With the widespread use of AA (Active Alignment) equipment, more and more cameras are adopting the AA process, which greatly improves the quality of camera modules and increases the yield rate of module manufacturers. The prerequisite for high-yield production is accurate system calibration and stable production of the equipment itself. The AA process, or Active Alignment, is a technology for determining the relative positions of components during assembly. Currently, AA focusing equipment requires adjusting the positions of the image card, the teleconverter lens, and the center position of the Uplook imaging module during the manufacturing process to ensure they align and meet product process requirements.

[0003] Currently, the calibration and debugging of the center point of the relay lens is usually based on the operator's skill level or past experience when installing the calibration fixture, which results in a large error. Utility Model Content

[0004] The purpose of this utility model is to provide a calibration fixture to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The solution to the technical problem of this utility model is:

[0006] A calibration fixture includes a body, which is mounted on a focusing device for use in conjunction with the calibration fixture.

[0007] The main body has a positioning cavity with an opening at the top, and the main body has a through hole that communicates with the positioning cavity.

[0008] Locking slots are respectively provided on the opposite sides of the main body. The focusing device is provided with a locking member that can rotate around a straight line parallel to the axis of the through hole. The locking member is provided with a snap-fit ​​end, and the locking member can rotate until the snap-fit ​​end enters and snaps into the locking slot.

[0009] This technical solution offers at least the following advantages: First, the interconnected design of the through-hole and positioning cavity on the main body forces the optical path through the relay lens to pass only through the through-hole of the fixture, preventing stray light deviation or interference and ensuring the stability of the optical path during optical alignment and testing, thus improving the accuracy of equipment debugging or testing. Second, by utilizing the locking slots on both sides of the main body in conjunction with the rotatable locking components on the focusing equipment, rotating the locking components allows the locking end to enter and engage with the locking slot, achieving rapid connection and fixation between the tooling and the equipment. Compared to traditional bolt fixing methods, this eliminates the need for repeatedly tightening fasteners, significantly shortening installation time and improving operational efficiency.

[0010] As a further improvement to the above technical solution, a first positioning groove is provided on one side of the main body and a second positioning groove is provided on the opposite side. A first positioning post and a second positioning post are provided on the focusing device. The first positioning post can be engaged with the first positioning groove and the second positioning post can be engaged with the second positioning groove.

[0011] As a further improvement to the above technical solution, a plurality of first positioning grooves are arranged on one side of the body, and a plurality of second positioning grooves are arranged on the other side of the body. The first positioning grooves and the second positioning grooves correspond one-to-one, and the first positioning grooves and the corresponding second positioning grooves are symmetrical to each other in a horizontal straight line.

[0012] As a further improvement to the above technical solution, the positioning cavity extends horizontally, and the first positioning groove and the second positioning groove are located on both sides of the extending direction of the positioning cavity.

[0013] As a further improvement to the above technical solution, the locking groove on one side of the body is provided with the first positioning groove on both sides along the horizontal direction perpendicular to the extension direction of the positioning cavity, and the locking groove on the other side of the body is provided with the second positioning groove on both sides along the horizontal direction perpendicular to the extension direction of the positioning cavity.

[0014] As a further improvement to the above technical solution, the cross-sectional area of ​​the first positioning post is smaller than the cross-sectional area of ​​the first positioning groove, and the cross-sectional area of ​​the second positioning post is smaller than the cross-sectional area of ​​the second positioning groove.

[0015] As a further improvement to the above technical solution, when the snap-fit ​​end is snapped into the locking groove, the distance between the two snap-fit ​​ends is equal to the distance between the two locking grooves.

[0016] As a further improvement to the above technical solution, the body forms a first stepped surface on the inner wall of the positioning cavity, and a first clearance space is formed at the first stepped surface.

[0017] As a further improvement to the above technical solution, the body forms a second step surface below the first step surface, and a second clearance space is formed at the first step surface.

[0018] As a further improvement to the above technical solution, an inclined surface is provided between the first step surface and the second step surface. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0020] Figure 1 This is an assembly diagram of the calibration fixture of this utility model when it is installed on a focusing device.

[0021] Figure 2 This is a schematic diagram of the overall structure of the calibration fixture of this utility model;

[0022] Figure 3 This is a cross-sectional view of the calibration fixture of this utility model from a frontal view. Detailed Implementation

[0023] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figure 1 This application discloses a calibration fixture, which includes a body 1. The body 1 is mounted on a focusing device 2 for use with the calibration fixture. A positioning cavity 11 with an upper opening is formed inside the body 1. A through hole 12 is provided on the body 1, which communicates with the positioning cavity 11. Locking grooves 18 are respectively provided on opposite sides of the body 1. A locking member 21 is provided on the focusing device 2, which is capable of rotating around a straight line parallel to the axis of the through hole 12. A locking end 22 is provided on the locking member 21, which can rotate until the locking end 22 enters and engages with the locking groove 18.

[0028] When installing the calibration fixture, the positioning cavity 11 of the calibration fixture is installed on the focusing device 2 and covers the installed relay lens. As mentioned above, firstly, the design of the through hole 12 on the main body 1 communicating with the positioning cavity 11 can forcefully constrain the optical path through the relay lens to pass only through the through hole 12 of the fixture, avoiding stray light deviation or interference, ensuring the stability of the optical path during optical alignment, testing, and other operations, and improving the accuracy of equipment debugging or testing. Secondly, by utilizing the locking grooves 18 on both sides of the main body 1 and the rotatable locking parts 21 on the focusing device 2, rotating the locking parts 21 allows the snap-fit ​​end 22 to enter and snap into the locking groove 18, achieving a quick connection and fixation between the fixture and the equipment. Compared with traditional bolt fixing methods, this eliminates the step of repeatedly tightening fasteners, significantly shortening the installation time and improving operational efficiency.

[0029] Specifically, in this embodiment, the locking element 21 is a cam that can rotate on the focusing device 2. The far end of the cam is a snap-fit ​​end 22. The locking groove 18 is arc-shaped and its edge is located on a circle with the center of the cam as the center. Cams are installed on both sides of the relay lens. The lower part of the locking groove 18 is open. After the cam rotates, its far end snaps into the locking groove 18. By rotating the cam, the body 1 can be quickly and conveniently fixed or detached from the focusing device 2, thereby improving the speed of disassembly and assembly of the body 1.

[0030] As a further embodiment of the above embodiments, the body 1 is provided with a clearance groove for the cam to pass through. When the body 1 is installed on the focusing device 2, the part of the cam except for the snap-fit ​​end 22 may rotate to the point that its horizontal projection overlaps with the projection part of the body 1 on the same plane, thereby hindering the assembly of the body 1. The clearance groove greatly reduces the obstruction of the cam to the body 1 during installation.

[0031] In other embodiments, the locking member 21 is any rotating drive member installed on the focusing device 2. The number of rotating drive members corresponds one-to-one with the number of locking slots 18. It can be any drive mechanism driven by a motor gear. This application embodiment does not specifically limit the rotating drive member. The movable end of the rotating drive member can move to be inserted into the locking slot 18. The opening of the locking slot 18 extends in the direction away from the body 1. The movable end of the rotating drive member abuts against the inner wall of the upper side of the locking slot 18 and the side away from its own opening, thereby accurately and stably fixing the body 1 on the focusing device 2 and calibrating the light path of the relay lens.

[0032] In some embodiments, a first positioning groove 13 is provided on one side of the main body 1 and a second positioning groove 14 is provided on the opposite side. The focusing device 2 is provided with a first positioning post 23 and a second positioning post 24. The first positioning post 23 can be engaged with the first positioning groove 13 and the second positioning post 24 can be engaged with the second positioning groove 14.

[0033] As can be seen from the above, during installation, the positioning pins are inserted into the positioning slots first, and the tooling and equipment can be initially engaged without the need for precise alignment by the naked eye. This solves the problem of difficulty in finding the correct position or the need for repeated adjustments in traditional installation, and shortens the alignment time before installation. At the same time, the positioning pins on both sides cooperate with the positioning slots to constrain the translation of the tooling in the horizontal direction, while preventing the tooling from rotating in the vertical direction. This avoids the optical path skew caused by positional deviation in the early stage of clamping. Moreover, after pre-positioning, the relative position of the tooling and the equipment is basically fixed, and the locking end 22 of the locking component 21 can enter the locking slot 18 more accurately, reducing mechanical wear during locking.

[0034] Furthermore, a plurality of first positioning grooves 13 are arranged on one side of the main body 1, and a plurality of second positioning grooves 14 are arranged on the other side of the main body 1. The first positioning grooves 13 and the second positioning grooves 14 correspond one-to-one. The first positioning grooves 13 and the corresponding second positioning grooves 14 are symmetrical to each other in a straight line in the horizontal direction. By distributing the first positioning grooves 13 and the corresponding second positioning grooves 14 horizontally symmetrically, the force on both sides of the tooling is balanced, avoiding the "center of gravity shift" caused by unilateral positioning, and preventing the tooling from tilting due to vibration during use.

[0035] In some embodiments, the positioning cavity 11 extends horizontally, and the first positioning groove 13 and the second positioning groove 14 are located on both sides of the extending direction of the positioning cavity 11. After the positioning cavity 11 extends, the position of internal components such as relay lenses can be directly observed through the cavity opening. At the same time, the positioning grooves are on both sides of the cavity, and the alignment status of the column and the groove can be seen intuitively during clamping, further improving the operating efficiency.

[0036] In some embodiments, the locking groove 18 on one side of the body 1 is provided with a first positioning groove 13 on both sides along the horizontal direction perpendicular to the extension direction of the positioning cavity 11, and the locking groove 18 on the other side of the body 1 is provided with a second positioning groove 14 on both sides along the horizontal direction perpendicular to the extension direction of the positioning cavity 11. In this way, a composite fixing method combining locking and bidirectional positioning is formed. The locking groove 18 is responsible for "locking" the tooling, and the positioning grooves on both sides further constrain the tooling from the direction perpendicular to the cavity, realizing multi-directional fixing in three-dimensional space. This solves the problem of one-sided loosening that may exist if only the locking member 21 is used. Secondly, the tooling may be subjected to lateral forces from the movement of the equipment during use, such as horizontal vibration during focusing. The positioning grooves on both sides of the locking groove 18 can hold the positioning post, preventing the tooling from displacing under the action of lateral forces, ensuring that the optical path always passes through the through hole 12. In addition, multiple positioning points share the clamping force, avoiding wear of the locking member 21 or the positioning post due to excessive force at a single point, and extending the service life of the tooling and the equipment.

[0037] In some embodiments, the cross-sectional area of ​​the first positioning post 23 is smaller than the cross-sectional area of ​​the first positioning groove 13, and the cross-sectional area of ​​the second positioning post 24 is smaller than the cross-sectional area of ​​the second positioning groove 14. During installation, the lack of gap may lead to locking failure due to pre-positioning deviation. If there is a slight positioning deviation, the tooling position can be slightly adjusted by the gap to ensure that the subsequent locking part 21 can be accurately inserted into the locking groove 18. At the same time, the gap makes the positioning post smoother when inserted into the positioning groove, avoiding friction and jamming caused by interference fit, which is especially suitable for scenarios that require frequent loading and unloading of tooling.

[0038] In this embodiment, when the locking end 22 is engaged with the locking groove 18, the distance between the two locking ends 22 is equal to the distance between the two locking grooves 18. If the distances do not match, one end may be tight and the other end may be loose, causing the tooling to shake. This design eliminates the loose space after locking when the locking member 21 is engaged in the locking groove 18, and completely locks the body 1 onto the focusing device 2. Secondly, the locking ends 22 on both sides are subjected to force evenly at the same time, and the tooling will not warp due to excessive force on one side, ensuring that the axis of the positioning cavity 11 remains coaxial with the optical path, reducing the situation where deformation causes the optical path to deviate from the center of the through hole 12. Moreover, the precise distance maximizes the contact area between the locking end 22 and the locking groove 18, increases the friction, and prevents the locking member 21 from falling off due to vibration during equipment operation, ensuring the stability of the calibration process and improving the reliability of locking.

[0039] To accommodate the slot for fixing the relay lens on the focusing device 2, the body 1 forms a first stepped surface 15 on the inner wall of the positioning cavity 11. A first clearance space is formed at the first stepped surface 15. Firstly, the first clearance space can accommodate the protrusion of the slot, avoiding direct pressure between the inner wall of the tooling and the surface of the slot, preventing scratches on the optical surface or crushing of the mechanical structure. Secondly, the first stepped surface 15 can serve as a support reference for adjusting the device, ensuring that the components are at the same height in the positioning cavity 11, avoiding optical path deviation caused by uneven placement of components. Furthermore, the clearance space reduces the contact area between the tooling and the components, reducing contact interference caused by processing errors.

[0040] In order to fit the outer edge of the relay lens, a second step surface 16 is formed below the first step surface 15. A second clearance space is formed at the first step surface 15. The shape of the second clearance space is adapted to the edge of the relay lens to reduce the possible collision between the body 1 and the relay lens.

[0041] As a further embodiment of the above embodiments, an inclined surface 17 is provided between the first step surface 15 and the second step surface 16. When installing components, the inclined surface 17 can smoothly transition, avoiding collisions when components fall directly vertically into the step, such as the lens edge sliding along the inclined surface 17 to the step surface, thus protecting the precision structure of the components and tooling. Moreover, compared with a right-angle step, the inclined surface 17 makes the contact between each component on the focusing device 2 and the body 1 smoother, reducing frictional resistance during loading and unloading.

[0042] Furthermore, the main body 1 has a connecting part extending outward at the first step surface 15. The locking groove 18, the first positioning groove 13, and the second positioning groove 14 are all installed on the connecting part. The connecting part is located on the side of the first step surface 15 away from the second step surface 16. The thickness of the connecting part is less than the depth of the positioning cavity 11 of the main body 1. Through this design, the thickness of the connecting part is greatly reduced, thereby reducing the overall weight of the main body 1 and thus reducing the risk of the main body 1 falling off the focusing device 2 due to excessive weight.

[0043] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A calibration fixture, comprising a body (1), said body (1) being mounted on a focusing device (2) for use with said calibration fixture, characterized in that: The main body (1) has a positioning cavity (11) with an opening at the top, and a through hole (12) is provided on the main body (1), which is connected to the positioning cavity (11). The main body (1) has locking grooves (18) on its opposite sides. The focusing device (2) is provided with a locking member (21) that can rotate around a straight line parallel to the axis of the through hole (12). The locking member (21) is provided with a snap-fit ​​end (22). The locking member (21) can rotate until the snap-fit ​​end (22) enters and snaps into the locking groove (18).

2. The calibration fixture according to claim 1, characterized in that, The main body (1) has a first positioning groove (13) on one side and a second positioning groove (14) on the opposite side. The focusing device (2) has a first positioning post (23) and a second positioning post (24). The first positioning post (23) can be engaged in the first positioning groove (13), and the second positioning post (24) can be engaged in the second positioning groove (14).

3. The calibration fixture according to claim 2, characterized in that, The main body (1) has a plurality of first positioning grooves (13) arranged on one side and a plurality of second positioning grooves (14) arranged on the other side. The first positioning grooves (13) and the second positioning grooves (14) correspond one to one. The first positioning grooves (13) and the corresponding second positioning grooves (14) are symmetrical to each other in a straight line in the horizontal direction.

4. The calibration fixture according to claim 2, characterized in that, The positioning cavity (11) extends horizontally, and the first positioning groove (13) and the second positioning groove (14) are located on both sides of the extending direction of the positioning cavity (11).

5. A calibration fixture according to claim 2, characterized in that, The main body (1) has a first positioning groove (13) on both sides of the locking groove (18) on one side, which extends horizontally and perpendicularly to the positioning cavity (11). The main body (1) has a second positioning groove (14) on both sides of the locking groove (18) on the other side, which extends horizontally and perpendicularly to the positioning cavity (11).

6. A calibration fixture according to claim 3, characterized in that, The cross-sectional area of ​​the first positioning post (23) is smaller than the cross-sectional area of ​​the first positioning groove (13), and the cross-sectional area of ​​the second positioning post (24) is smaller than the cross-sectional area of ​​the second positioning groove (14).

7. A calibration fixture according to claim 6, characterized in that, When the snap-fit ​​end (22) snaps into the locking groove (18), the distance between the two snap-fit ​​ends (22) is equal to the distance between the two locking grooves (18).

8. A calibration fixture according to claim 7, characterized in that, The body (1) forms a first stepped surface (15) on the inner wall of the positioning cavity (11), and a first clearance space is formed at the first stepped surface (15).

9. A calibration fixture according to claim 8, characterized in that, The main body (1) forms a second step surface (16) below the first step surface (15), and a second clearance space is formed at the first step surface (15).

10. A calibration fixture according to claim 9, characterized in that, An inclined surface (17) is provided between the first step surface (15) and the second step surface (16).

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