zoom device

Abstract

This utility model provides a zoom device, including a base, a lens module configured for adjusting the focal length, a connecting structure configured to assemble the lens module onto the base, and a driving structure for driving the lens module to move. The connecting structure includes a guide rod fixedly connected to the base and a slide mounted on the guide rod for assembling the lens module. The driving structure includes a driving part and a transmission component coupled to the driving part and connected to the slide. The base is integrally formed. According to this utility model, a zoom device with improved measurement accuracy can be provided.

Description

Technical Field

[0001] This utility model relates to the field of intelligent manufacturing equipment industry, specifically to a zoom device. Background Technology

[0002] Laser trackers are high-precision 3D measurement devices that play a crucial role in modern industry due to their superior measurement performance. Employing the principle of laser ranging, laser trackers can achieve micron-level precision in spatial coordinate measurement within a working range of tens of meters. In industrial applications, they cover areas including, but not limited to: aircraft assembly in the aerospace field, body inspection in the automotive manufacturing industry, and the precision measurement needs of other large equipment.

[0003] Laser trackers typically include a camera with zoom capabilities to meet different needs in various measurement scenarios. The camera generally consists of a zoom module and a drive mechanism. The drive mechanism moves the zoom module to change the camera's focal length, enabling alignment, magnification, and reduction of the object under test, thereby acquiring a clear image of the object.

[0004] However, during the movement of the zoom module, the optical axis of the lens may shift, resulting in image blurring. Furthermore, as the camera is used, components will typically wear or deform, hindering the movement of the zoom module and consequently reducing measurement accuracy. Summary of the Invention

[0005] This utility model is proposed in view of the above-mentioned state of the prior art, and its purpose is to provide a zoom device that can improve measurement accuracy.

[0006] Therefore, this utility model provides a zoom device, including a base and a lens module configured to adjust the focal length. The zoom device further includes a connecting structure configured to assemble the lens module onto the base, and a driving structure for driving the lens module to move. The connecting structure includes a guide rod fixedly connected to the base, and a slide sleeved on the guide rod and configured to assemble the lens module. The driving structure includes a driving part and a transmission component coupled to the driving part and connected to the slide. The base is integrally formed.

[0007] In this invention, the guide rod guides the carriage, providing more stable guidance and improving the linearity of carriage movement. Furthermore, by integrally molding the base, its rigidity is increased, reducing deformation during the use of the zoom device. Compared to a split base, the integrally molded base also reduces errors caused by assembly. Therefore, measurement accuracy is improved.

[0008] In addition, in the zoom device of this utility model, optionally, the base is a cylindrical structure with a hollow portion, the carriage is accommodated in the hollow portion, and the guide rod is fixed to both ends of the base along the length direction of the base. This provides more ample space for the carriage to move.

[0009] In addition, in the zoom device of this utility model, optionally, the base includes a first end, a second end, and a side portion that cooperates with the first end and the second end to form a hollow portion for accommodating the carriage. The first end has a first positioning hole, the second end has a second positioning hole, and the guide rod is fixedly connected to the base in a manner that positions it within the first positioning hole and the second positioning hole. This facilitates the installation of the guide rod and the positioning of the lens module.

[0010] In addition, in the zoom device of this utility model, optionally, the first end also has a first functional hole that communicates with and is orthogonal to the first positioning hole, and the second end also has a second functional hole that communicates with and is orthogonal to the second positioning hole. A first fixing member and a second fixing member configured to fix the guide rod are respectively provided in the first functional hole and the second functional hole. In this case, by providing the first functional hole and the second functional hole, and by providing the first fixing member and the second fixing member in the first functional hole and the second functional hole respectively, it is convenient to fix and replace the guide rod.

[0011] Furthermore, in the zoom device of this utility model, optionally, the guide rod has a first notch with a plane and a second notch with a plane at its two ends near the base, and the first fixing member and the second fixing member abut against the plane of the first notch and the plane of the second notch, respectively. In this case, the contact between the first fixing member and the first notch, and the contact between the second fixing member and the second notch, are both surface contacts. Compared with point contacts, this can more stably fix the guide rod and suppress the rotation of the guide rod, thereby improving the reliability of the guide rod 41 fixation.

[0012] Furthermore, in the zoom device of this utility model, optionally, there are multiple guide rods and multiple carriages, with each carriage sleeved on multiple guide rods. In this case, by sleeved on multiple guide rods, each carriage can suppress carriage torsion, thereby helping to ensure the optical axis consistency of the lens module.

[0013] Alternatively, in the zoom device of this invention, the driving unit may be a lead screw, and the transmission assembly may be threadedly coupled to the driving unit. In this case, the transmission accuracy can be improved by using a lead screw drive.

[0014] Alternatively, in the zoom device of this utility model, a bearing may be provided at the end of the drive unit. The drive unit includes a fixed part configured to house the bearing and a first threaded part coupled to the transmission assembly and connected to the fixed part. The size of the fixed part is not larger than the size of the first threaded part. In this case, the bearing provided on the fixed part can abut against the end face of the first threaded part, thereby facilitating the positioning of the drive unit by the bearing.

[0015] Alternatively, in the zoom device of this utility model, the base may include a first end, a second end, and a side portion that cooperates with the first end and the second end to form a hollow portion for accommodating the carriage. The first end has a third positioning hole, and the second end has a fourth positioning hole. The drive unit is connected to the base in a manner that positions itself in the third positioning hole and the fourth positioning hole. The drive structure includes a threaded plug disposed in the third positioning hole or the fourth positioning hole and configured to abut against the bearing to fix the bearing. In this case, by providing the third positioning hole and the fourth positioning hole, it is convenient to position the drive unit, and by fixing the bearing with the threaded plug, it is convenient to fix the drive unit.

[0016] Furthermore, in the zoom device of this utility model, optionally, the drive structure includes an elastic connector, which is disposed between the threaded plug and the bearing and remains in an energy-storing state. In this case, the elastic connector, maintaining its energy-storing state, can continuously apply external force, facilitating the reduction of the axial clearance between the outer and inner rings of the bearing. Additionally, by controlling the deformation of the elastic connector, the magnitude of the force applied by the elastic connector can be easily controlled, thereby reducing the possibility of a sudden increase in resistance or even jamming of the outer and inner rings of the bearing due to excessive force. Furthermore, since the force applied by the elastic connector is elastic, it can buffer unwanted movement of the drive unit, thereby reducing the possibility of damage to the drive unit.

[0017] According to this utility model, a zoom device that improves measurement accuracy can be provided. Attached Figure Description

[0018] The present invention will now be explained in further detail by way of example only with reference to the accompanying drawings.

[0019] Figure 1 This diagram illustrates an application scenario of the optical measuring instrument involved in this utility model.

[0020] Figure 2A This is a schematic diagram showing the structure of the zoom device involved in this utility model example.

[0021] Figure 2BThis is a schematic diagram of the structure of the base involved in this utility model example.

[0022] Figure 2C This is a schematic diagram showing the movable mirror assembly of the present invention mounted on a carriage.

[0023] Figure 2D This is a schematic diagram showing the carriage sleeved on the guide rod according to the example of this utility model.

[0024] Figure 2E This is a schematic diagram showing the first positioning hole and the second positioning hole involved in the example of this utility model.

[0025] Figure 3A It shows Figure 2D An enlarged schematic diagram of region A in the middle.

[0026] Figure 3B It shows Figure 3A A sectional view along line XX.

[0027] Figure 3C It shows Figure 3A A cross-sectional view along the YY line.

[0028] Figure 3D This is a schematic diagram showing the first elastic member and the second elastic member involved in the present utility model example.

[0029] Figure 3E This is a schematic diagram illustrating a second embodiment of the first connecting mechanism involved in this utility model example.

[0030] Figure 4 This is a schematic diagram showing the guide blocks arranged diagonally according to an example of the present invention.

[0031] Figure 5 This is a schematic diagram showing the centrally symmetrical arrangement of the two carriages involved in this utility model example.

[0032] Figure 6 This is an exploded view showing the carriage and transmission assembly involved in the present invention.

[0033] Figure 7A This is a schematic diagram illustrating the structure of a second embodiment of the transmission component involved in this utility model example.

[0034] Figure 7B This is a schematic diagram illustrating the second elastic element involved in this utility model example.

[0035] Figure 8A This is a schematic diagram showing the structure of the driving structure involved in this utility model example.

[0036] Figure 8B This is a schematic diagram showing the first bearing involved in this utility model example.

[0037] Figure 8C This is a schematic diagram showing the second bearing involved in this utility model example. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals are used for the same parts, and repeated descriptions are omitted. Furthermore, the drawings are merely schematic diagrams, and the proportions of the parts or the shapes of the parts may differ from the actual figures.

[0039] It should be noted that the terms "comprising" and "having" in this utility model, and any variations thereof, such as the process, method, system, product, or device comprising or having a series of steps or units, are not necessarily limited to those steps or units explicitly listed, but may include or have other steps or units not explicitly listed or inherent to these processes, methods, products, or devices. In this document, relative position and direction terms such as "above," "below," "left," "right," "front," and "rear" are used with reference to common operating postures and should not be considered restrictive.

[0040] First, the relevant terminology involved in this utility model will be introduced. "Control precision" can refer to the precision of controlling the movable mirror assembly to move to a predetermined position. The higher the control precision, the closer the position of the movable mirror assembly is to the predetermined position. "Control precision" can also refer to the precision of controlling the movable mirror assembly to move a predetermined distance; the higher the control precision, the closer the distance the movable mirror assembly moves is to the predetermined distance. "Floating connection" can refer to a dynamically adjustable connection. For example, a floating connection between the carriage and the guide rod can mean that the relative position of the carriage and the guide rod can be dynamically adjusted.

[0041] The zoom device described in this invention can be used in optical measuring instruments. By precisely controlling the movement of the movable lens group to a predetermined position or a predetermined distance, it improves control accuracy, thereby helping the optical measuring instrument to accurately locate the target. In some examples, the optical measuring instrument described in this invention may also be referred to as an optical measuring system, an optical tracking system, a laser tracker, or an optical measuring system with tracking and scanning functions, etc. The zoom device described in this invention may also be referred to as a zoom module, a zoom system, or a camera, etc.

[0042] The zoom device involved in this utility model example will be described in detail below with reference to the accompanying drawings.

[0043] Figure 1This is a diagram illustrating an application scenario of the optical measuring instrument 100 involved in this utility model example.

[0044] See in some examples Figure 1 The optical measuring instrument 100 can measure the target 200. In some examples, the optical measuring instrument 100 can be used to emit a light beam toward the target 200. The target 200 can reflect the received light beam back to the optical measuring instrument 100. In some examples, the optical measuring instrument 100 can measure the target 200 based on the light beam reflected by the target 200.

[0045] In some examples, the optical measuring instrument 100 can measure the spatial coordinates and spatial attitude of the target 200. In some examples, the optical measuring instrument 100 can also identify the target 200 based on a beam of light reflected from the target 200. In some examples, the optical measuring instrument 100 can also track the target 200 based on a beam of light reflected from the target 200. In some examples, the optical measuring instrument 100 can be a laser measuring instrument such as a laser tracker, lidar, or total station.

[0046] See in some examples Figure 1 The optical measuring instrument 100 may include a zoom device 10. In some examples, the zoom device 10 may be configured to acquire the spatial attitude of the target 200. In some examples, the zoom device 10 can acquire the spatial attitude of the target 200 by acquiring an image of the target 200. This facilitates the optical measuring instrument 100 in measuring the spatial attitude of the target 200.

[0047] In some examples, the zoom device 10 may have a zoom function. That is, the zoom device 10 can adjust its own focal length. In some examples, the zoom device 10 can adjust its own focal length to align, magnify, or reduce the target 200. This helps the zoom device 10 to obtain a clear image of the target 200 in different measurement scenarios.

[0048] Figure 2A This is a schematic diagram showing the structure of the zoom device 10 involved in this utility model example. Figure 2B This is a schematic diagram showing the structure of the base 2 involved in this utility model example. Figure 2C This is a schematic diagram showing the movable mirror assembly 11 of the present invention assembled on the slide 42.

[0049] See in some examples Figure 2A The zoom device 10 may include a lens module 1. The lens module 1 may be configured to adjust the focal length.

[0050] As described above, the zoom device 10 can acquire an image of the target 200. In some examples, the lens module 1 can acquire an image of the target 200. In some examples, the image acquired by the lens module 1 can be an optical signal containing spatial attitude information of the target 200 (hereinafter referred to as the first optical signal). Thus, it is convenient to acquire the spatial attitude of the target 200.

[0051] See in some examples Figure 2A The zoom device 10 may include a base 2. The base 2 may be configured to support the lens module 1. In some examples, the base 2 may be integrally formed. This increases the rigidity of the base 2, thereby improving the stability of the zoom device 10. In addition, it reduces assembly errors when assembling other components (such as the lens module 1) to the base 2.

[0052] In other examples, the base 2 can also be modular. This makes it easier to assemble other components (such as the lens module 1) into the interior of the base 2.

[0053] See in some examples Figure 2B The base 2 may have a hollow portion 21. The hollow portion 21 may be configured to accommodate the lens module 1. In some examples, the base 2 may have a cylindrical structure. This provides more space for the lens module 1 to move.

[0054] See in some examples Figure 2B The base 2 may include a first end 22 and a second end 23. The first end 22 may be located at the front end of the base 2. The second end 23 may be located at the rear end of the base 2. The first end 22 may be opposite to the second end 23.

[0055] See in some examples Figure 2B The base 2 may also include a side portion 24. The side portion 24 may cooperate with the first end portion 22 and the second end portion 23 to form a hollow portion 21.

[0056] See in some examples Figure 2B The base 2 may have a first opening 25. The lens module 1 can be fitted into the interior of the base 2 through the first opening 25. In some examples, the first opening 25 may be located on top of the base 2. This facilitates the assembly of the lens module 1.

[0057] In some examples, the base 2 may have a second opening. The second opening may be located below the base 2. In some examples, the lens module 1 may also be fitted into the interior of the base 2 through the second opening. In cases where the guide block 422 (described later) is long, the second opening below the base 2 facilitates the fitting of the lens module 1.

[0058] See in some examples Figure 2BThe base 2 may have a third opening 26. The third opening 26 may be located on the side wall (i.e., side 24) of the base 2. This facilitates the adjustment of the lens module 1 inside the base 2. In some examples, the size of the third opening 26 may be determined based on factors such as the rigidity of the base 2 and the size of the components assembled in the base 2.

[0059] In some examples, the two opposite sidewalls of the base 2 may each be provided with a third opening 26. In this case, when there are multiple movable mirror assemblies 11 (described later), the installation of the movable mirror assembly 11 and the drive structure 6 (described later) that matches each movable mirror assembly 11 can be assisted from the third opening 26 on both sides, thereby reducing the difficulty of installation.

[0060] In some examples, the zoom device 10 may include a masking film configured to cover the third opening 26. This reduces the impact of external factors (such as dust or moisture) on the lens module 1 after assembly and adjustment.

[0061] In some examples, the zoom device 10 may include a first sensor 3 (see Figure 2A or Figure 2B The first sensor 3 can be configured to receive signals (e.g., a first optical signal). This facilitates the acquisition and transmission of images of the target 200. In some examples, the first sensor 3 can be an optical sensing element.

[0062] See in some examples Figure 2B The first sensor 3 can be mounted on the base 2. The base 2 may also include a boss 27. The boss 27 may be formed at the rear end of the base 2. The first sensor 3 can be fixed to the boss 27. This facilitates the first sensor 3 in receiving signals from the lens module 1. In some examples, the interior of the boss 27 may be a through-hole structure, and the photosensitive coupling component on the rear end of the first sensor 3 may be positioned directly opposite the lens module 1 at the front end, thereby facilitating the reception of signals from the lens module 1.

[0063] In some examples, lens module 1 may include movable lens group 11 (see Figure 2C The movable lens group 11 can move relative to the base 2. This allows the lens module 1 to easily adjust its focal length.

[0064] In some examples, the number of movable lens groups 11 can be at least one. For example, the number of movable lens groups 11 can be one, two, three, four, or five. In some examples, when there is one movable lens group 11, the movable lens group 11 can be moved relative to the base 2 to adjust the focal length. In some examples, when there are multiple movable lens groups 11, one or more movable lens groups 11 can be moved simultaneously relative to the base 2 to adjust the focal length.

[0065] See in some examples Figure 2A The lens module 1 may include a fixed lens group 12. The fixed lens group 12 may be fixed to the base 2. In this embodiment, the position of the fixed lens group 12 in the base 2 is fixed, which can provide basic optical performance for the entire optical system and optimize the imaging quality to a certain extent, improve the image sharpness, contrast and resolution, etc., and can work together with the movable lens group 11 to achieve good imaging effect of the zoom device 10 at different focal lengths.

[0066] In some examples, the number of fixed lens groups 12 can be at least one. For example, the number of fixed lens groups 12 can be one, and one fixed lens group 12 can be fixed to the front end or the rear end of the base 2. As another example, the number of fixed lens groups 12 can be two, the optical axes of the two fixed lens groups 12 can coincide, and the two fixed lens groups 12 can be fixed to the front end and the rear end of the base 2 respectively, or both can be fixed to the front end or the rear end of the base 2.

[0067] In this utility model, the example is described with two fixed lens groups 12, and the two fixed lens groups 12 are respectively fixed to the front end and the rear end of the base 2. However, this should not be construed as a limitation of this utility model.

[0068] In some examples, the front end of the base 2 has a through hole configured to mount the fixed lens assembly 12. In some examples, the fixed lens assembly 12 can be mounted in the through hole at the front end of the base 2 and inside the boss 27 at the rear end of the base 2, respectively.

[0069] See in some examples Figure 2A The zoom device 10 may include a connecting structure 4. The connecting structure 4 may be configured to assemble the movable lens group 11 onto the base 2.

[0070] In some examples, the connecting structure 4 can connect the movable mirror assembly 11 to the base 2. In some examples, the movable mirror assembly 11 can be movably connected to the base 2 via the connecting structure 4. This facilitates the movement of the movable mirror assembly 11 relative to the base 2.

[0071] In some examples, the connection structure 4 may include a guide rod 41 (see...) Figure 2A In some examples, guide rod 41 can be configured to guide movable mirror assembly 11. This facilitates control of the movable mirror assembly 11 along a predetermined path planned by guide rod 41. In some examples, the predetermined path may refer to the desired movement path of the movable mirror assembly 11. Guide rod 41 can extend along the predetermined path. Movable mirror assembly 11 can move along the extension direction of guide rod 41 (also referred to as the axial direction).

[0072] See in some examples Figure 2AThe guide rod 41 can be fixed to the base 2. In some examples, the guide rod 41 can be fixed to both ends of the base 2 along its length. In some examples, the extension direction of the guide rod 41 can be the same as the length direction of the base 2. That is, the extension direction of the guide rod 41 can be parallel to the central axis of the base 2. This provides more space for the movable mirror assembly 11 to move.

[0073] In some examples, the connection structure 4 may include a carriage 42 (see Figure 2A The carriage 42 can be configured to mount (or carry) the lens module 1. Specifically, it can be configured to mount (or carry) the movable lens group 11. In some examples, the movable lens group 11 can be fixed to the carriage 42 (see [link to original text]). Figure 2C ).

[0074] In some examples, the carriage 42 can be accommodated in the hollow portion 21. This provides more space for the carriage 42 to move.

[0075] In some examples, the guide rod 41 can also be configured to position and guide the carriage 42. The carriage 42 can be connected to the guide rod 41 (e.g., fitted onto the guide rod 41). The movable mirror assembly 11 can be connected to the guide rod 41 via the carriage 42. In this case, compared to the movable mirror assembly 11 being directly connected to the guide rod 41, connecting it to the guide rod 41 via the carriage 42 facilitates the protection of the movable mirror assembly 11 and improves the smoothness of its movement. The smoother the movement of the movable mirror assembly 11 (or the carriage 42) along the guide rod 41, the lower the likelihood of the movable mirror assembly 11 (or the carriage 42) jamming.

[0076] See in some examples Figure 2C The carriage 42 can have a ring-shaped load-bearing structure. For example, the ring-shaped load-bearing structure can be circular. This facilitates the assembly of the movable mirror assembly 11.

[0077] In some examples, the number of guide rods 41 can be at least one. For example, the number of guide rods 41 can be one, two, three, or four. A carriage 42 can be fitted onto at least one guide rod 41. In some examples, the number of carriages 42 can be at least one. For example, the number of carriages 42 can be one, two, three, or four. A carriage 42 can carry at least one movable mirror assembly 11.

[0078] Figure 2D This is a schematic diagram showing the slide 42 sleeved on the guide rod 41 according to the example of this utility model.

[0079] See in some examples Figure 2DEach carriage 42 can be fitted with multiple guide rods 41. This suppresses torsion of the carriage 42, thereby improving the consistency of the optical axis. It is understood that the number of guide rods 41 fitted to a carriage 42 can be selected according to requirements. For example, the number of guide rods 41 can be selected based on the requirements for the linearity of the carriage 42's movement and the reliability of the zoom device 10, or based on the machining and assembly precision of each component (e.g., carriage 42 and guide rods 41). Preferably, a carriage 42 can be fitted with two guide rods 41, thereby reducing assembly difficulty while improving the linearity of the carriage 42's movement.

[0080] As described above, the guide rod 41 can be fixed to the base 2 (see...). Figure 2A In some examples, the base 2 may have guide rod positioning holes (i.e., the first positioning hole 221 and the second positioning hole 231, described later). The guide rod positioning holes may be configured to position the guide rod 41. In some examples, the guide rod positioning holes may also be configured to fix the guide rod 41. In some examples, the guide rod 41 may be fitted into the interior of the base 2 (i.e., the hollow portion 21) through the guide rod positioning holes.

[0081] In some examples, the position of the guide rod positioning hole can be matched with the position of the fixed lens assembly 12. Matching can mean that when the guide rod 41 is fixed to the guide rod positioning hole and the carriage 42 is fitted onto the guide rod 41, the optical axis of the movable lens assembly 11 mounted on the carriage 42 coincides with the optical axis of the fixed lens assembly 12 mounted on the base 2. This helps to improve the consistency of the optical axis, thereby improving the sharpness of the image (e.g., the image of target 200) and the accuracy of measurement.

[0082] In some examples, the number of guide rod positioning holes can be at least one. A guide rod 41 can be fixed to at least one guide rod positioning hole. For example, a guide rod 41 can be fixed to only one end of a guide rod positioning hole. Alternatively, both ends of a guide rod 41 can be fixed to two guide rod positioning holes respectively. This allows for a more stable fixation of the guide rod 41.

[0083] Figure 2E This is a schematic diagram showing the first positioning hole 221 and the second positioning hole 231 involved in the example of this utility model.

[0084] In some examples, when there are multiple guide rod positioning holes, these holes can be arranged in pairs, opposite each other, at the front and rear ends of the base 2. For details, see [link to relevant documentation]. Figure 2B The first end 22 may have a first positioning hole 221. The second end 23 may have a second positioning hole 231. The two ends of the guide rod 41 may be fixed to the first positioning hole 221 and the second positioning hole 231, respectively. This helps to make the guide rod 41 parallel to the optical axis of the fixed lens assembly 12.

[0085] See in some examples Figure 2B The first end 22 may also have a first functional hole 222. The first functional hole 222 may communicate with the first positioning hole 221. In some examples, a first fastener 43a may be provided in the first functional hole 222 (see...). Figure 2E The first fixing member 43a can be configured to fix the guide rod 41. This facilitates the fixing of the guide rod 41.

[0086] See in some examples Figure 2E The first functional hole 222 can be orthogonal to the first positioning hole 221. This improves the fixing effect of the first fastener 43a.

[0087] See in some examples Figure 2E The second end 23 may also have a second functional hole 232. The second functional hole 232 may communicate with the second positioning hole 231. In some examples, a second fixing member 43b may be provided in the second functional hole 232. The second fixing member 43b may be configured to fix the guide rod 41. Thus, it is convenient to fix the guide rod 41.

[0088] See in some examples Figure 2E The second functional hole 232 can be orthogonal to the second positioning hole 231. This improves the fixing effect of the second fastener 43b.

[0089] In some examples, the first fixing member 43a and the second fixing member 43b can be insert rods. The portion of the guide rod 41 that is fixed to the first positioning hole 221 and the second positioning hole 231 can have insertion holes. In this case, the first fixing member 43a and the second fixing member 43b can fix the guide rod 41 by inserting it into the insertion holes.

[0090] In some examples, the first fixing member 43a and the second fixing member 43b can be set screws. The first functional hole 222 and the second functional hole 232 can be threaded holes. The first fixing member 43a and the second fixing member 43b can fix the guide rod 41 by abutting against it. Therefore, it is easy to fix the guide rod 41 to the first positioning hole 221 and the second positioning hole 231, and the guide rod 41 can be fixed relatively securely. The following description uses the example of the first fixing member 43a and the second fixing member 43b being set screws.

[0091] See in some examples Figure 2E The guide rod 41 may have a first notch 411a and a second notch 411b. When the guide rod 41 is fixed in the first positioning hole 221, the first notch 411a may be located in the first positioning hole 221. When the guide rod 41 is fixed in the second positioning hole 231, the second notch 411b may be located in the second positioning hole 231. This facilitates the fixing of the guide rod 41.

[0092] In other examples, the guide rod 41 may also have only a first notch 411a or a second notch 411b. This facilitates the machining of the guide rod 41.

[0093] See in some examples Figure 2E The first notch 411a can be formed with a flat surface. Let the flat surface formed by the first notch 411a be the first flat surface 412a. The first fixing member 43a can abut against the first flat surface 412a. The second notch 411b can also be formed with a flat surface. Let the flat surface formed by the second notch 411b be the second flat surface 412b. The second fixing member 43b can abut against the second flat surface 412b. In this case, the contact between the first fixing member 43a and the first notch 411a, and the contact between the second fixing member 43b and the second notch 411b are both surface contacts. Compared with point contacts, this can more stably fix the guide rod 41 and suppress the rotation of the guide rod 41, thereby improving the reliability of the guide rod 41 fixation.

[0094] In other examples, the first functional hole 222, the second functional hole 232, the first fastener 43a, the second fastener 43b, the first notch 411a, and the second notch 411b may not be present. In this case, the guide rod 41 can be fixed to the first positioning hole 221 and the second positioning hole 231 by means of dispensing, snap-fitting, or welding.

[0095] To improve the linearity of the carriage 42's movement and suppress its torsion, a carriage 42 is typically fitted onto at least two guide rods 41. In this case, due to factors such as machining and assembly errors, multiple guide rods 41 may over-position the carriage 42, causing the carriage 42 to jam or resulting in excessive friction between the carriage 42 and the guide rods 41, thus reducing the smoothness of the carriage 42's movement. Therefore, this invention also proposes a floating connection structure between the carriage 42 and the guide rods 41, which can reduce the impact of the guide rods 41 over-positioning. The following description uses one carriage 42 fitted onto two guide rods 41 as an example, but this should not be construed as limiting this invention. This invention is also applicable to scenarios where one carriage 42 is fitted onto other numbers of guide rods 41.

[0096] In some examples, carriage 42 may include a first connecting mechanism 421 (see Figure 2DIn some examples, the first connecting mechanism 421 can be connected to the guide rod 41. That is, the carriage 42 can be connected to the guide rod 41 through the first connecting mechanism 421. In some examples, the carriage 42 can be floatingly connected to the guide rod 41. In some examples, the first connecting mechanism 421 can be floatingly connected to the guide rod 41. In this case, by floatingly connecting the carriage 42 to the guide rod 41 through the first connecting mechanism 421, the carriage 42 can adapt to the position of the guide rod 41, reducing the possibility of the carriage 42 and the guide rod 41 getting stuck, thereby improving the reliability of the zoom device 10. In this utility model, adaptive connection can refer to the carriage 42 being connected to the guide rod 41 through the first connecting mechanism 421 in a way that automatically adapts to the position of the guide rod 41.

[0097] Specifically, the carriage 42 needs to abut against the guide rod 41 to be guided by it. Therefore, an appropriate abutment force helps the carriage 42 maintain contact with the guide rod 41 during movement and also suppresses the carriage 42 from swaying relative to the guide rod 41. However, when the abutment force is too large (e.g., over-positioning or deformation of the guide rod 41), the friction between the carriage 42 and the guide rod 41 intensifies, increasing the possibility of the carriage 42 jamming with the guide rod 41. Under the action of the first connecting mechanism 421, the carriage 42 can both adapt to the position of the guide rod 41 and maintain contact with the guide rod 41 with an appropriate abutment force to eliminate the gap between them, thereby reducing the possibility of the carriage 42 jamming and allowing the carriage 42 to move under the guidance of the guide rod 41. For ease of description, the guide rod 41 that is floatingly connected to the carriage 42 will be referred to as the first guide rod 41a.

[0098] See in some examples Figure 2D The first connecting mechanism 421 can be sleeved on the first guide rod 41a. In some examples, the first connecting mechanism 421 may include an opening 4211. The opening 4211 can be configured to sleeve the first guide rod 41a. This facilitates the connection between the first connecting mechanism 421 and the first guide rod 41a.

[0099] As described above, the number of guide rods 41 fitted onto the same carriage 42 can be multiple. In some examples, the number of first connecting mechanisms 421 can be at least one. In some examples, the number of first connecting mechanisms 421 can be selected based on the number of guide rods 41 fitted onto the carriage 42. For example, when the number of fitted guide rods 41 is two, the number of first connecting mechanisms 421 can be one (see...). Figure 2D For example, when there are three guide rods 41, the number of first connecting mechanisms 421 can be two.

[0100] In some examples, the zoom device 10 may include a floating element 5 (see Figure 2D In some examples, the floating element 5 can abut against the first guide rod 41a. For ease of understanding, Figure 2D The portion of the floating member 5 and the first guide rod 41a located in the first connecting mechanism 421 is also shown.

[0101] In some examples, the floating member 5 can float according to the position of the first guide rod 41a in the opening 4211. That is, the floating member 5 can float to adapt to the position of the first guide rod 41a in the opening 4211. In this case, the floating member 5 floats and abuts against the first guide rod 41a located at any position in the opening 4211, thereby adapting the first connecting mechanism 421 to the position of the first guide rod 41a. This reduces the possibility of the carriage 42 getting stuck due to the first guide rod 41a overshooting the positioning carriage 42, thereby improving the reliability of the zoom device 10. In addition, the gap between the carriage 42 and the first guide rod 41a can be eliminated, and the carriage 42 can be guided by the first guide rod 41a while floatingly connected to it.

[0102] Understandably, the radial dimension of the opening 4211 is larger than the radial dimension of the first guide rod 41a. In this case, when the first guide rod 41a passes through the opening 4211, there is a gap between the first guide rod 41a and the opening 4211. Since the first guide rod 41a is fixed to the base 2 via the first positioning hole 221, that is, the position of the first guide rod 41a is restricted by the first positioning hole 221, the larger radial dimension of the opening 4211 can provide a larger space to accommodate the first guide rod 41a, thereby reducing the requirement for the machining accuracy of the position of the first positioning hole 221. In addition, it can also allow the actual position of the fixed first guide rod 41a in the opening 4211 to have a certain offset from the predetermined position, suppressing the first guide rod 41a from generating excessive abutment force due to excessive compression of the sidewall of the opening 4211.

[0103] To improve the optical axis consistency of the lens module 1, the position of the slide 42 relative to the base 2 in the radial direction of the guide rod 41 should be fixed as much as possible, that is, the slide 42 should not wobble or twist in the radial direction as much as possible. By abutting the first guide rod 41a with the floating member 5, the gap between the first guide rod 41a and the opening 4211 can be eliminated, the wobble of the slide 42 relative to the guide rod 41 can be suppressed, the linearity of the movement of the slide 42 can be improved, and the optical axis consistency can be improved.

[0104] In some examples, the floating member 5 may be disposed around the opening 4211. In some examples, the floating member 5 may be disposed buoyantly around the opening 4211. This facilitates the floating member 5 abutting against the first guide rod 41a in the opening 4211.

[0105] In some examples, the floating member 5 may be at least partially disposed between the opening 4211 and the first guide rod 41a. In some examples, the floating member 5 may be at least partially disposed between the opening 4211 and the first guide rod 41a in a manner that abuts against the first guide rod 41a. This facilitates a floating connection between the first connecting mechanism 421 and the first guide rod 41a.

[0106] In some examples, the floating member 5 adapting to the position of the first guide rod 41a can mean that the floating member 5 abuts against the first guide rod 41a after moving accordingly based on the position of the first guide rod 41a in the opening 4211. In different zoom devices 10, due to factors such as machining errors of the first positioning hole 221, the position of the guide rod 41 in the opening 4211 may be different. The floating member 5 can automatically adapt (i.e., self-adapt) to any position of the guide rod 41 in the opening 4211 while maintaining contact with the guide rod 41, so that the guide rod 41 guides the carriage 42.

[0107] In some examples, the floating element 5 can also be configured to fix the first connecting mechanism 421 and the first guide rod 41a relative to each other. This suppresses swaying of the carriage 42 relative to the first guide rod 41a.

[0108] In some examples, the floating member 5 can be configured to fix the first connecting mechanism 421 and the first guide rod 41a relative to each other along a preset direction. In some examples, the floating member 5 can abut against the first guide rod 41a in a preset direction. The preset direction can refer to the radial direction of the first guide rod 41a. In this case, since the direction of the abutment force is the radial direction of the first guide rod 41a, the position of the floating member 5 can be adjusted more adaptively, thereby more stably fixing the first connecting mechanism 421 and the first guide rod 41a relative to each other.

[0109] In this utility model, Figure 2D A first embodiment of the first connecting mechanism 421 according to this utility model example is also shown. The first embodiment of the first connecting mechanism 421 is described below.

[0110] In some examples, the first connecting mechanism 421 may include a channel. The floating element 5 may be disposed in the channel.

[0111] In some examples, the number of channels can be two. See also: Figure 2D The first connecting mechanism 421 may include a first channel 4213 and a second channel 4214.

[0112] In some examples, the first channel 4213 may communicate with the opening 4211. The second channel 4214 may also communicate with the opening 4211. In some examples, the first channel 4213 and the second channel 4214 may be arranged on opposite sides of the opening 4211. In some examples, the first channel 4213 and the second channel 4214 may be symmetrically arranged on opposite sides of the opening 4211. The floating member 5 can abut against the first guide rod 41a through the first channel 4213 and the second channel 4214. This allows the abutment force exerted by the floating member 5 on the first guide rod 41a to be collinear, thereby facilitating the relative fixation of the first connecting mechanism 421 and the first guide rod 41a.

[0113] In some examples, the first channel 4213 and the second channel 4214 can be symmetrically arranged on both sides of the opening 4211 along a preset direction. In this case, by arranging the first channel 4213 and the second channel 4214 on both sides of the opening along a preset direction, it is convenient for the floating member 5 to fix the first connecting mechanism 421 and the first guide rod 41a relatively along the preset direction.

[0114] In other examples, the number of channels may be one, three, or four. Understandably, the number of channels can be chosen based on the requirements for the smoothness and linearity of the movement of the carriage 42. The more channels there are, the more restrictions are placed on the degrees of freedom of the first guide rod 41a, and the higher the linearity of the movement of the carriage 42. However, the assembly or adjustment of the floating component 5 also becomes more difficult, and it is easy for the carriage 42 to jam with the guide rod 41.

[0115] Figure 3A It shows Figure 2D An enlarged schematic diagram of region A in the middle. Figure 3B It shows Figure 3A A sectional view along line XX. Figure 3C It shows Figure 3A A cross-sectional view along the YY line. For clarity, in... Figure 3B and Figure 3C The cross-sectional lines of the components and structures in floating part 5 are omitted.

[0116] In some examples, the floating element 5 may include a first rolling column 51a (see...) Figure 3A The first rolling column 51a can be configured to abut against the first guide rod 41a. The first rolling column 51a can also be configured to roll relative to the first guide rod 41a. In some examples, the floating element 5 may include a second rolling column 51b (see [link to example]). Figure 3AThe second rolling column 51b can be configured to abut against the first guide rod 41a. The second rolling column 51b can also be configured to roll relative to the first guide rod 41a. In this case, compared to sliding friction, rolling friction can be formed by the first rolling column 51a and the second rolling column 51b abutting against and rolling relative to the first guide rod 41a, thereby reducing the frictional force between the floating member 5 and the first guide rod 41a.

[0117] See in some examples Figure 3B The first rolling column 51a and the second rolling column 51b can be located at least partially in the opening 4211. This facilitates the contact between the first rolling column 51a and the second rolling column 51b and the first guide rod 41a.

[0118] See in some examples Figure 3A The floating member 5 may include a first locking member 52a. The first locking member 52a may be configured to apply an action to the first rolling column 51a. The floating member 5 may also include a second locking member 52b. The second locking member 52b may be configured to apply an action to the second rolling column 51b. This helps to maintain the first rolling column 51a and the second rolling column 51b in contact with the first guide rod 41a.

[0119] See in some examples Figure 3B The first locking member 52a can be configured to apply force to the first rolling column 51a in a preset direction. The second locking member 52b can be configured to apply force to the second rolling column 51b in a preset direction. This facilitates the first rolling column 51a and the second rolling column 51b abutting against the first guide rod 41a in the preset direction.

[0120] In some examples, the first locking element 52a and the second locking element 52b can be set screws.

[0121] See in some examples Figure 3B The first locking member 52a and the first rolling column 51a can be disposed in the first connecting mechanism 421 in a manner that allows them to be embedded in the first connecting mechanism 421. This allows the first locking member 52a and the first rolling column 51a to be fixed more stably.

[0122] See in some examples Figure 3B The second locking member 52b and the second rolling column 51b can be disposed in the first connecting mechanism 421 in a manner that allows them to be embedded in the first connecting mechanism 421. This enables the second locking member 52b and the second rolling column 51b to be fixed more stably.

[0123] See in some examples Figure 3AThe floating member 5 may include a first support base 53a. The first support base 53a may be disposed between the first locking member 52a and the first rolling column 51a. Thus, it can support the first rolling column 51a.

[0124] See in some examples Figure 3C The first support 53a may have an arcuate groove 54 (hereinafter referred to as the first arcuate groove 54a). The first arcuate groove 54a may abut against the first rolling column 51a. In some examples, the first arcuate groove 54a may match the outer contour of the first rolling column 51a. Matching may mean that the outer contour of the first arcuate groove 54a is the same as that of the first rolling column 51a. Thus, the first rolling column 51a can be better supported to rotate within the first arcuate groove 54a, and the sliding or wobbling of the first rolling column 51a within the first arcuate groove 54a can be suppressed.

[0125] See in some examples Figure 3A The floating member 5 may include a second support base 53b. The second support base 53b may be disposed between the second locking member 52b and the second rolling column 51b. Thus, it can support the second rolling column 51b.

[0126] See in some examples Figure 3C The second support 53b may have an arcuate groove 54 (hereinafter referred to as the second arcuate groove 54b). The second arcuate groove 54b may abut against the second rolling column 51b. In some examples, the second arcuate groove 54b may match the outer contour of the second rolling column 51b. Matching may mean that the outer contour of the second arcuate groove 54b is the same as that of the second rolling column 51b. Thus, the second rolling column 51b can be better supported to rotate within the second arcuate groove 54b, and the sliding or wobbling of the second rolling column 51b within the second arcuate groove 54b can be suppressed.

[0127] In some examples, the materials of the first support 53a and the second support 53b may include at least one of copper, cast iron, lead, and tin. In this case, since such materials readily generate powder during friction, it helps to reduce the frictional resistance between the first rolling column 51a and the first support 53a, and between the second rolling column 51b and the second support 53b.

[0128] See in some examples Figure 3BThe floating element 5 may include an elastic element 55 (e.g., a first elastic element 55a and a second elastic element 55b, described later). In this case, since the position of a rigid floating element 5 is usually difficult to adjust and the positional accuracy requirements for a rigid floating element 5 are also high, while the elastic element 55 can provide a certain buffer space for the position adjustment of the floating element 5 through elastic deformation, the elastic element 55 can effectively reduce the difficulty of adjusting the position of the floating element 5 compared to a rigid floating element 5. In addition, the elastic element 55 can also make adaptive compensation during use. For example, when some undesirable situations occur (such as interference caused by deformation of the first guide rod 41a or gaps caused by wear at the contact position), the elastic element 55 can also actively adapt through elastic deformation, thereby maintaining the contact force between the floating element 5 and the first guide rod 41a within the expected range, reducing the risk of an exponential increase in contact force due to a small interference caused by the design or deformation of the first guide rod 41a, and also reducing the risk of excessively loose contact with the first guide rod 41a due to gaps caused by wear.

[0129] In some examples, the elastic element 55 can be an elastic ball. This allows the elastic element 55 to deform under pressure from any direction. In other examples, the elastic element 55 can also be a spring.

[0130] In some examples, the number of elastic elements 55 can be one. This simplifies the structure of the floating element 5.

[0131] See in some examples Figure 3C The floating element 5 (e.g., elastic element 55) may include a first elastic element 55a. The first elastic element 55a may be disposed between the first guide rod 41a and the first locking element 52a. In this case, by controlling the elastic deformation of the first elastic element 55a, the force exerted by the first locking element 52a on the first guide rod 41a can be easily controlled within the expected range.

[0132] Figure 3D This is a schematic diagram showing the first elastic member 55a and the second elastic member 55b involved in this utility model example. For greater clarity, in... Figure 3D The cross-sectional lines of the components and structures in floating part 5 are omitted.

[0133] In some examples, the number of elastic elements 55 can also be multiple. For example, the number of elastic elements 55 can be two, three, four, or five. See also Figure 3D , Figure 3D An example is shown where the floating element 5 includes two elastic elements 55.

[0134] See in some examples Figure 3DThe floating member 5 may further include a second elastic member 55b. The second elastic member 55b may be disposed between the first guide rod 41a and the second locking member 52b. In this case, by controlling the elastic deformation of the second elastic member 55b, the force exerted by the second locking member 52b on the first guide rod 41a can be easily controlled within the expected range.

[0135] In some examples, the first elastic element 55a and the second elastic element 55b can be arranged on both sides of the first guide rod 41a along a predetermined direction. This enables the floating element 5 to adapt to the lateral deformation of the first guide rod 41a.

[0136] In other examples, the floating element 5 may also consist of only the second elastic element 55b.

[0137] See in some examples Figure 3B The first channel 4213 may include a first through hole 42131. A first locking member 52a may be coupled to the first through hole 42131. In some examples, the coupling between the first locking member 52a and the first through hole 42131 may be threaded coupling. This facilitates the fixing and adjustment of the first locking member 52a.

[0138] See in some examples Figure 3B The first channel 4213 may include a first groove 42132. The first groove 42132 may be configured to receive a first rolling column 51a. In some examples, the first groove 42132 may communicate with a first through hole 42131. This facilitates the first locking member 52a to apply force to the first rolling column 51a.

[0139] See in some examples Figure 3B The second channel 4214 may include a second through hole 42141. The second locking member 52b may be coupled to the second through hole 42141. In some examples, the coupling between the second locking member 52b and the second through hole 42141 may be threaded coupling. This facilitates the fixing and adjustment of the second locking member 52b.

[0140] See in some examples Figure 3B The second channel 4214 may include a second groove 42142. The second groove 42142 may be configured to receive the second rolling column 51b. In some examples, the second groove 42142 may communicate with the second through hole 42141. This facilitates the second locking member 52b in applying force to the second rolling column 51b.

[0141] In some examples, the first connecting mechanism 421 may also include a first cover plate 4215 (see Figure 3AThe first cover plate 4215 can be configured to close the notch of the opening 4211. This reduces the likelihood that components (e.g., the first rolling column 51a and the second rolling column 51b) will fall out of the opening 4211.

[0142] In some examples, the first cover plate 4215 can also be configured to close the first channel 4213 and the second channel 4214 (see Figure 3B This reduces the likelihood of components (such as the first rolling column 51a and the second rolling column 51b) falling out within the first channel 4213 and the second channel 4214.

[0143] The second embodiment of the first connecting mechanism 421 involved in this utility model example is described below. Figure 3E This is a schematic diagram illustrating the structure of a second embodiment of the first connecting mechanism 421 involved in this utility model example. It should be noted that the following only describes in detail the differences between the second embodiment and the first embodiment of the first connecting mechanism 421; identical structures or parts can be referred to the description of the first embodiment of the first connecting mechanism 421, and will not be repeated here.

[0144] In a second embodiment of the first connecting mechanism 421, the first connecting mechanism 421 may not include the first channel 4213 and the second channel 4214. The floating member 5 may not include the first rolling column 51a, the second rolling column 51b, the first locking member 52a, the second locking member 52b, the first support seat 53a, the second support seat 53b, the arcuate groove 54, and the elastic member 55.

[0145] As described above, the opening 4211 can be configured to accommodate the first guide rod 41a, and the floating member 5 can float to adapt to the position of the first guide rod 41a within the opening 4211. See also some examples. Figure 3E The floating member 5 can be disposed in the opening 4211. In some examples, the floating member 5 may include a sliding connector. Let the sliding connector of the floating member 5 be a first sliding connector 56. The first sliding connector 56 can be fitted with the first guide rod 41a. This facilitates the movement of the carriage 42. In some examples, the first sliding connector 56 can be a ball bearing.

[0146] In some examples, the floating member 5 may include an elastic gap-eliminating member. In some examples, the elastic gap-eliminating member may be equivalent to the elastic member 55 in the first embodiment of the first connecting mechanism 421. In some examples, the elastic gap-eliminating member may have the same function as the elastic member 55 in the first embodiment of the first connecting mechanism 421.

[0147] In some examples, an elastic backlash-eliminating element can be disposed between the first sliding connector 56 and the opening 4211. In this case, the elastic backlash-eliminating element can eliminate the gap between the first sliding connector 56 and the opening 4211, suppressing the wobbling of the carriage 42 relative to the guide rod 41, and improving the linearity of the carriage 42's movement and the consistency of its optical axis. In this embodiment, the radial dimension of the opening 4211 is larger than the radial dimension of the first sliding connector 56, thereby providing a certain tolerance space for the positioning of the first guide rod 41a, helping to avoid the first sliding connector 56 directly contacting the carriage 42, reducing the risk of interference fit between the first sliding connector 56 and the carriage 42, and thus reducing the accuracy requirements for the machining position of the first positioning hole 221.

[0148] See in some examples Figure 3E The opening 4211 can be annular. Specifically, the carriage 42 can have a first connecting mechanism 421. The first connecting mechanism 421 can be a protrusion formed by the side wall of the carriage 42, and an opening can be provided at the edge of the protrusion away from the center of the carriage 42 to form an annular structure, which serves as the opening 4211. In some examples, the annular structure can have a notch. Let the notch on the annular structure be a third notch 4212. Thus, it is convenient to assemble the first sliding connector 56 into the opening 4211.

[0149] In some examples, the carriage 42 may also rigidly abut against the guide rod 41. In some examples, the zoom device 10 may include a second guide rod 41b (see...). Figure 2D or Figure 3E The second guide rod 41b can rigidly abut against the carriage 42. That is, the guide rod 41 rigidly connected to the carriage 42 is the second guide rod 41b. This facilitates the second guide rod 41b supporting the carriage 42.

[0150] See in some examples Figure 2D or Figure 3E The first guide rod 41a and the second guide rod 41b can be parallel. This reduces the possibility of the carriage 42 getting stuck.

[0151] See in some examples Figure 2D or Figure 3E The connecting structure 4 may include a sliding connector. Let the sliding connector of the connecting structure 4 be a second sliding connector 44. In some examples, the second sliding connector 44 may connect the carriage 42 and the second guide rod 41b. This facilitates the movement of the carriage 42 along the second guide rod 41b. In some examples, the second sliding connector 44 may be a ball bearing or a linear bearing.

[0152] See in some examples Figure 2DThe carriage 42 may include a guide block 422. The guide block 422 can be fitted onto the second guide rod 41b. That is, the carriage 42 can be fitted onto the second guide rod 41b via the guide block 422. In some examples, the guide block 422 may have a guide hole 4221. The second sliding connector 44 can be disposed in the guide hole 4221. For example, the sidewall of the guide block 422 has an opening for setting a set screw to fix the second sliding connector 44 in the guide hole 4221. Thus, after the carriage 42 is fitted onto the second guide rod 41b, the friction between the guide block 422 and the guide rod 41b can be reduced, thereby improving the smoothness of the movement of the movable mirror assembly 11.

[0153] In some examples, the guide block 422 can be elongated cylindrical. The guide block 422 can be disposed on the side wall of the annular bearing structure of the carriage 42. In some examples, the axial length of the guide block 422 can be greater than its radial length. In this case, by providing a guide block 422 with a larger length-to-diameter ratio, the smoothness of the carriage 42's movement can be effectively improved. It is understood that the longer the guide block 422 is and the smaller the inner diameter of the guide hole 4221 (or the second sliding connector 44), the smoother the movement of the carriage 42. However, since the length of the guide rod 41 is limited by the base 2, the length of the guide block 422 sleeved on the guide rod 41 is not necessarily better the longer it is. An excessively long guide block 422 can easily lead to insufficient space for the carriage 42 to move, thus affecting the zoom effect.

[0154] See in some examples Figure 2D or Figure 3E If the carriage 42 is fitted with at least two guide rods 41, then the carriage 42 can simultaneously have a first connecting mechanism 421 and a guide block 422. The first connecting mechanism 421 and the guide block 422 can each fit one guide rod 41 (for example, the first connecting mechanism 421 can fit a first guide rod 41a, and the guide block 422 can fit a second guide rod 41b). The guide block 422, through its rigid structure and cooperation with the guide rods 41, provides a reference for the positioning of the carriage 42, improving the positional accuracy and linearity of the carriage 42 during movement. The first connecting mechanism 421, through its floating connection, can better adapt to the position of the guide rods 41, reducing the risk of over-positioning and thus lowering the machining accuracy requirements for the position of the first positioning hole 221 used to fix the position of the guide rods 41.

[0155] It should be noted that this utility model does not impose excessive restrictions on the relative positions of the first connecting mechanism 421 and the guide block 422 within the carriage 42, as long as it facilitates the installation of the carriage 42. Of course, this utility model is not limited to this.

[0156] Figure 4 This is a schematic diagram showing the guide block 422 arranged diagonally according to an example of the present invention.

[0157] See in some examples Figure 4 The carriage 42 may also omit the first connecting mechanism 421. The carriage 42 may only have multiple guide blocks 422, and each guide block 422 may be fitted with multiple guide rods 41. This facilitates the installation of the carriage 42.

[0158] See in some examples Figure 4 Different carriages 42 can be fitted with different guide rods 41. Of course, this invention is not limited to this; different carriages 42 can also share one or more guide rods 41. For example, see... Figure 2A There are 3 guide rods 41. Each of the two carriages 42 can be fitted with a second guide rod 41b, and the two carriages 42 can share a first guide rod 41a.

[0159] When there are multiple carriages 42, if the guide block 422 is too long or the distance between the carriages 42 is too close, the guide block 422 of one carriage 42 may collide with another carriage 42, thereby hindering the movement of the carriage 42. In some examples, the position of the guide block 422 of each carriage 42, the position of the first connecting mechanism 421, or the annular bearing structure of the carriage 42 can be adaptively adjusted to form a notch for the guide block 422 to move.

[0160] See in some examples Figure 2C and Figure 4 The sidewall of the annular load-bearing structure of the carriage 42 may have a fourth notch 423. The fourth notch 423 may be configured to allow other guide blocks 422 (e.g., guide blocks 422 of an adjacent carriage 42) to pass through. The size of the fourth notch 423 may be larger than the size of the guide block 422. This reduces obstruction to the movement of the carriage 42. For example, the guide blocks 422 of the two carriages 42 may be in different positions, and after the two carriages 42 are installed, their positions may be staggered. The guide block 422 of the carriage 42 near the front end may pass through the structural notch (i.e., the fourth notch 423) of the carriage 42 near the rear end, where no other structure is provided.

[0161] Figure 4 An embodiment with four guide rods 41 is also shown. See also: [link to example]. Figure 4 Multiple guide blocks 422 can be arranged diagonally on the carriage 42. This further suppresses the torsion of the carriage 42.

[0162] Figure 5 This is a schematic diagram showing the centrally symmetrical arrangement of two carriages 42 involved in this utility model example. Figure 5 In this illustration, some structures have been simplified for clarity, but this should not be construed as a limitation of the present invention.

[0163] See in some examples Figure 5 The guide blocks 422 of two adjacent carriages 42 can be disposed on different guide rods 41. In some examples, the extending directions of the guide blocks 422 of two adjacent carriages 42 can be opposite. That is, two adjacent carriages 42 can be centrally symmetrically fitted onto the guide rods 41. This reduces the obstruction to the movement of the carriages 42.

[0164] In some examples, the number of guide blocks 422 of a carriage 42 can also be multiple. Multiple guide blocks 422 of a carriage 42 can be fitted onto multiple guide rods 41. For example, each guide block 422 can be fitted onto one guide rod 41. This can suppress torsion of the carriage 42, thereby helping to improve the consistency of the optical axis and reducing the possibility of the carriage 42 jamming with the guide rods 41.

[0165] See in some examples Figure 2D or Figure 3E The connecting structure 4 may include a fixing member. Let the fixing member of the connecting structure 4 be a third fixing member 43c. The third fixing member 43c can fix the second sliding connecting member 44 to the carriage 42. Thus, the relative movement between the carriage 42 and the second sliding connecting member 44 can be suppressed, and the control accuracy of the movement of the carriage 42 can be improved.

[0166] In some examples, a mounting hole configured as a third fixing member 43c may be provided on the guide block 422. This facilitates the third fixing member 43c fixing the second sliding connector 44 to the carriage 42. In some examples, the third fixing member 43c can be a set screw. In some examples, when the third fixing member 43c is a set screw, the mounting hole can be a threaded hole. Of course, the present invention is not limited to this; the second sliding connector 44 can also be engaged and fixed in the guide hole 4221 of the guide block 422.

[0167] In some examples, see [reference] Figure 2A The zoom device 10 may include a drive structure 6. In some examples, the drive structure 6 may be configured to drive the lens module 1 to move. In some examples, the drive structure 6 may be configured to drive the movable lens group 11 to move.

[0168] In some examples, the drive structure 6 may include a drive unit 61 (see Figure 2A In some examples, the drive unit 61 may be configured to provide a driving force. In some examples, the drive unit 61 may provide a driving force to the movable mirror assembly 11 (or carriage 42) to drive the movable mirror assembly 11 (or carriage 42) to move.

[0169] In some examples, there can be multiple drive units 61. In some examples, the number of drive units 61 can be equal to the number of carriages 42. In some examples, one drive unit 61 can drive one carriage 42. This facilitates precise zooming. In other examples, one drive unit 61 can also drive multiple carriages 42.

[0170] In some examples, the axial direction of the drive unit 61 can be parallel to the axial direction of the guide rod 41. This facilitates the drive unit 61 in driving the movable mirror assembly 11 to move along the axial direction of the guide rod 41.

[0171] In some examples, the drive structure 6 may include a transmission assembly 62 (see Figure 2A The transmission assembly 62 can be configured to transmit driving force. The transmission assembly 62 can transmit the driving force provided by the drive unit 61 to the movable mirror assembly 11. Specifically, the transmission assembly 62 can move under the drive of the drive unit 61, thereby transmitting the driving force to the movable mirror assembly 11.

[0172] In some examples, see [reference] Figure 2D The transmission assembly 62 can be connected to the carriage 42. Thus, the transmission assembly 62 can drive the carriage 42 to move under the action of the drive unit 61.

[0173] In some examples, the transmission assembly 62 may be movably connected to the carriage 42. In this case, when the drive unit 61 generates an unwanted motion and transmits it to the transmission assembly 62, the transmission assembly 62 can suppress the transmission of the unwanted motion to the carriage 42 by moving relative to the carriage 42, thereby reducing the impact of the unwanted motion on the carriage 42.

[0174] For example, when the drive unit 61 is a lead screw, the undesirable motion may refer to the deformation or swinging of the lead screw during use. In this case, when the transmission assembly 62 is movably connected to the carriage 42, the movable connection provides the transmission assembly 62 with a certain space to move relative to the carriage 42, which can effectively suppress the problem of the carriage 42 getting stuck or generating excessive noise during movement caused by the deformation or swinging of the lead screw acting on the carriage 42 through the transmission assembly 62.

[0175] In some examples, the transmission assembly 62 can be movably connected to the carriage 42 in a manner that allows it to move along a preset plane. In some examples, the preset plane can be orthogonal to the axial direction of the guide rod 41. In this case, when an unwanted movement generated by the drive unit 61 is transmitted to the transmission assembly 62, the transmission assembly 62 can reduce the impact of the unwanted movement generated by the drive unit 61 on the carriage 42 by moving relative to the carriage 42 along the preset plane, thereby improving the optical axis consistency of the lens module 1.

[0176] In other examples, the transmission assembly 62 may also be fixedly connected to the carriage 42. For example, a side wall protrusion of the transmission assembly 62 forms a connector, and a side wall protrusion of the annular load-bearing structure of the carriage 42 forms a connector. The two connectors cooperate with each other to be fixedly connected by means of snap-fit, screws, or adhesive.

[0177] The following is a detailed description of the example of the movable connection between the transmission assembly 62 and the carriage 42. Figure 6 This is an exploded view showing the carriage 42 and transmission assembly 62 involved in this utility model example.

[0178] See in some examples Figure 6 The transmission assembly 62 may include a first connector 621. The carriage 42 may include a second connector 424. The first connector 621 can be connected to the second connector 424. This facilitates the connection between the transmission assembly 62 and the carriage 42.

[0179] In some examples, one side of the first connector 621 can abut against the second connector 424. Specifically, the first connector 621 can be connected to the second connector 424 in such a way that it abuts against the second connector 424 in the axial direction of the guide rod 41. This allows the drive unit 61 to drive the carriage 42 to move along the guide rod 41.

[0180] See in some examples Figure 6 The first connector 621 may have a connecting hole 6211. The second connector 424 may include a connecting post 4241. The connecting post 4241 may mate with the connecting hole 6211. In this case, the mate between the connecting hole 6211 and the connecting post 4241 helps to maintain the connection between the first connector 621 and the second connector 424. That is, it reduces the risk of the first connector 621 and the second connector 424 becoming detached. In some examples, the connecting hole 6211 may be fitted onto the connecting post 4241.

[0181] In some examples, the connecting post 4241 may be parallel to the guide rod 41. In other words, the connecting post 4241 may extend along the axial direction of the guide rod 41. This facilitates the rotation and sliding of the first connecting member 621 relative to the second connecting member 424 within a predetermined plane.

[0182] In some examples, the size of the connecting hole 6211 can match the size of the connecting post 4241. In this case, by reducing the gap between the connecting post 4241 and the connecting hole 6211, it is possible to suppress significant wobbling of the connecting post 4241 within the connecting hole 6211, reduce noise, and lower the likelihood of damage to the connecting post 4241. "Matching" can mean that the size of the connecting hole 6211 is approximately the same as the size of the connecting post 4241, or it can be larger than the size of the connecting post 4241 in some directions.

[0183] See in some examples Figure 6 The connecting hole 6211 can be an oblong hole. The length of the oblong hole can be greater than the outer diameter of the connecting post 4241. The width of the oblong hole can be configured to restrict the sliding of the first connector 621 along the width direction of the oblong hole. For example, the diameter of the connecting post 4241 can be equal to the width of the oblong hole (i.e., the width of the oblong hole is the same as the outer diameter of the connecting post 4241) or slightly smaller than the width of the oblong hole. In this case, the width dimension of the oblong hole can restrict the movable space of the first connector 621 in the width direction and facilitate the sliding of the first connector 621 in the length direction. When the drive unit 61 produces an undesirable movement, the first connector 621 can rotate relative to the second connector 424 about the connecting post 4241 in a preset plane under the drive of the drive unit 61, or slide in a preset plane along the length direction of the oblong hole.

[0184] In other examples, the connecting hole 6211 may also be a circular hole. The diameter of the connecting hole 6211 may be slightly larger than the diameter of the connecting post 4241.

[0185] In some examples, the transmission assembly 62 can abut against the carriage 42 along the axial direction of the guide rod 41. This improves the control precision of the movement of the carriage 42 in the axial direction of the guide rod 41.

[0186] See in some examples Figure 6 The second connector 424 may include a substrate 4242. In some examples, the substrate 4242 may be configured to abut against the transmission assembly 62. In this case, surface contact between the substrate 4242 and the transmission assembly 62 increases the contact area and improves the stability of the abutment compared to point contact.

[0187] In some examples, the first connector 621 may be plate-shaped. This increases the contact area with the base plate 4242, thereby making the transmission assembly 62 more stably contact the carriage 42.

[0188] In some examples, the connecting post 4241 may be formed on the substrate 4242 (see Figure 6 When the transmission component 62 abuts against the base plate 4242, the connection hole 6211 can engage with the connection post 4241.

[0189] See in some examples Figure 6The substrate 4242 may have a connecting groove 4243. A connecting post 4241 may be formed on the bottom surface of the connecting groove 4243. When the connecting hole 6211 mates with the connecting post 4241, the first connector 621 may be located in the connecting groove 4243. This further reduces the possibility of the first connector 621 disengaging from the second connector 424, thereby helping to maintain the contact state between the first connector 621 and the second connector 424.

[0190] In some examples, when the first connector 621 is located in the connecting groove 4243, the first connector 621 can abut against the bottom surface of the connecting groove 4243. This facilitates the positioning of the first connector 621 and the second connector 424 in the axial direction of the guide rod 41.

[0191] In some examples, the size of the connecting groove 4243 can be larger than the size of the portion of the first connector 621 within the connecting groove 4243. That is, there can be a gap between the first connector 621 disposed in the connecting groove 4243 and the sidewall of the connecting groove 4243. This provides movable space for the first connector 621, enabling a movable connection between the two. In some examples, the depth of the connecting groove 4243 can be greater than the thickness of the portion of the first connector 621 within the connecting groove 4243.

[0192] See in some examples Figure 6 A first elastic element 45 may be provided on the side of the first connector 621 away from the substrate 4242. The first elastic element 45 may be configured to apply a first action to the first connector 621 to cause the transmission assembly 62 to abut against the substrate 4242. In this case, by applying an action to the transmission assembly 62, the first elastic element 45 can improve the stability of the abutment between the transmission assembly 62 and the substrate 4242, and the two elastically connected parts have a degree of freedom of relative movement, which can buffer undesired movement of the transmission assembly 62 (e.g., the transmission assembly 62 being impacted), thereby reducing the possibility of the transmission assembly 62 and the carriage 42 jamming.

[0193] In some examples, a cover plate may be provided on the side of the first connector 621 away from the substrate 4242. Let the cover plate provided on the side of the first connector 621 away from the substrate 4242 be designated as the second cover plate 46 (see [reference]). Figure 6 The second cover plate 46 can be configured to compress the first elastic element 45. That is, the first elastic element 45 can remain in an energy-storing state. In this case, the second cover plate 46 can help keep the first elastic element 45 in an energy-storing state and can fix the position of the first elastic element 45.

[0194] In some examples, the first elastic element 45 may be disposed between the first connector 621 and the second cover plate 46. This facilitates the compression of the first elastic element 45.

[0195] In some examples, the second cover plate 46 can be detachably fixed to the base plate 4242. This facilitates the installation of the first elastic element 45.

[0196] In some examples, the second cover plate 46 can be fixed to the substrate 4242 by screws. Specifically, the second cover plate 46 may have an opening, and the substrate 4242 may have screw holes corresponding to the opening, so that the second cover plate 46 can be fixed by screws.

[0197] In some examples, the first elastic element 45 may be configured to apply a second action (i.e., apply a force to the transmission assembly 62) to cause the transmission assembly 62 to abut (or adhere to) the drive portion 61. In this case, the radial clearance between the transmission assembly 62 and the drive portion 61 can be reduced, thereby reducing the possibility of the transmission assembly 62 wobbling and improving the transmission accuracy of the transmission assembly 62.

[0198] In some examples, the first elastic element 45 can be configured to apply a third action (i.e., apply a force to the carriage 42) to cause the carriage 42 to abut (or press against) the guide rod 41. In this case, the radial clearance between the carriage 42 and the guide rod 41 can be reduced, thereby reducing the possibility of the carriage 42 wobbling and improving the accuracy of the repeatability of the carriage 42.

[0199] In some examples, the first elastic element 45 can be a torsion spring (see...) Figure 6 The two torsion arms of the torsion spring can be fixed to the first connecting member 621 and the second cover plate 46, respectively. In this case, the two torsion arms of the torsion spring can generate two forces in opposite directions, which are applied to the first connecting member 621 (i.e., the second force) and the second cover plate 46 (i.e., the third force). Since the second cover plate 46 is fixed to the base plate 4242, the force applied to the second cover plate 46 can be transmitted to the base plate 4242, that is, to the carriage 42.

[0200] In some examples, the first elastic element 45 may be fitted onto the connecting post 4241. This allows the first elastic element 45 to exert its influence on the first connector 621 and the second cover plate 46.

[0201] In some examples, the second cover plate 46 may have a functional hole. Let the functional hole on the second cover plate 46 be a third functional hole 461 (see...). Figure 6 In some examples, the third functional hole 461 can be configured to adjust and fix the first elastic element 45.

[0202] See in some examples Figure 6 The number of third functional holes 461 can be multiple. In this case, by fixing the first elastic element 45 to different third functional holes 461, the second and third actions can be easily adjusted (for example, the size and direction of the second and third actions can be adjusted).

[0203] In some examples, when the first elastic element 45 is a torsion spring, one torsion arm of the torsion spring can be fixed to the third functional hole 461. In some examples, the second and third actions can be adjusted by fixing the torsion arm to different third functional holes 461 to cause the first elastic element 45 to twist to different degrees.

[0204] See in some examples Figure 6 The first connecting member 621 may have a boss 622 configured to abut against the torsion arm of the torsion spring. Of course, the present invention is not limited to this, and the torsion arm of the torsion spring may also abut directly against the main body structure of the transmission assembly 62.

[0205] In some examples, see [reference] Figure 2A The transmission component 62 can be coupled to the drive unit 61. This facilitates the transmission of driving force.

[0206] In some examples, the transmission assembly 62 can be threadedly coupled to the drive unit 61. This improves the control precision of the carriage 42's movement.

[0207] In some examples, the transmission assembly 62 may be made of metal. In some examples, a dust cover may be provided below the drive unit 61. The cross-section of the dust cover may be curved. In this case, since the transmission assembly 62 generates powder during use, isolating the powder with the dust cover can reduce the impact of the powder on other components.

[0208] In some examples, the drive unit 61 can be a lead screw. The transmission assembly 62 can be a nut that mates with the lead screw. In this case, the transmission accuracy can be improved by using a lead screw drive.

[0209] Figure 2DA first embodiment of the transmission assembly 62 is shown. In some examples, the drive unit 61 can be a ball screw. Balls can be provided within the transmission assembly 62. In some examples, when the drive unit 61 is a ball screw, the transmission assembly 62 can be a nut with balls. In this case, it is easy to reduce the gap between the transmission assembly 62 and the drive unit 61 by adjusting the size of the balls. In addition, the coefficient of friction and noise between the transmission assembly 62 and the drive unit 61 can be reduced, and the possibility of adjacent carriages 42 self-locking after a collision can be reduced. Specifically, rolling friction occurs between the nut, balls, and screw, and the interference fit between the three causes a small deformation of the rigid component (i.e., microscopic elastic deformation), thereby reducing the gap between the transmission assembly 62 and the drive unit 61.

[0210] Figure 7A This is a schematic diagram showing the structure of a second embodiment of the transmission component 62 involved in this utility model example. Figure 7B This is a schematic diagram illustrating the second elastic element 624 involved in an example of this utility model. Figure 7A In this illustration, the structure of the transmission component 62 has been simplified for clarity, but this should not be construed as a limitation of the present invention.

[0211] Figure 7A and Figure 7B A second embodiment of the transmission assembly 62 is shown. In some examples, the drive unit 61 may also be a trapezoidal screw or other types of screws besides ball screws. In some examples, the transmission assembly 62 may include a first transmission element 623 (see...). Figure 7A or Figure 7B The first transmission element 623 can be configured to transmit driving force. In some examples, the first transmission element 623 can be connected to the carriage 42. In some examples, the first transmission element 623 can be threadedly coupled to the drive unit 61. Thus, the drive unit 61 can easily drive the carriage 42 via the first transmission element 623.

[0212] In some examples, the transmission assembly 62 may also include a second elastic element 624 (see Figure 7B In some examples, the second elastic element 624 can remain in an energy-storing state. In this case, the first transmission element 623 can be axially pressed against the drive unit 61 under the action of the second elastic element 624, reducing the gap between the first transmission element 623 and the drive unit 61, thereby improving control accuracy.

[0213] In some examples, the energy storage state can refer to a state in which the second elastic element 624 can release energy. For example, it can refer to the deformation of the second elastic element 624 to store elastic potential energy. In some examples, one end of the second elastic element 624 can abut against the first transmission element 623. The other end of the second elastic element 624 can abut against the second transmission element 625 (described later) or the base 2. This facilitates the second elastic element 624 maintaining its energy storage state.

[0214] See in some examples Figure 7B The transmission assembly 62 may further include a second transmission element 625. The second transmission element 625 may be threadedly coupled to the drive unit 61. In some examples, a second elastic element 624 may be disposed between the first transmission element 623 and the second transmission element 625. That is, one end of the second elastic element 624 may abut against the first transmission element 623, and the other end may abut against the second transmission element 625. In this case, the second transmission element 625 is axially pressed against the drive unit 61 under the action of the second elastic element 624, which can reduce the axial clearance between the second transmission element 625 and the drive unit 61, thereby improving control accuracy.

[0215] See in some examples Figure 7B The first transmission element 623 and the second transmission element 625 can be separate units. In this case, since the action of the second elastic element 624 on the first transmission element 623 and the second transmission element 625 is in opposite directions, the separate design facilitates relative movement of the first transmission element 623 and the second transmission element 625 compared to a one-piece structure. Furthermore, it helps prevent the actions of the second elastic element 624 on the first transmission element 623 and the second transmission element 625 from canceling each other out. If the first transmission element 623 and the second transmission element 625 were one piece, the two actions applied by the second elastic element 624 would cancel each other out, making it difficult to eliminate the gap between the first transmission element 623 and the second transmission element 625 and the drive unit 61.

[0216] In some examples, the second transmission element 625 can remain relatively stationary with respect to the first transmission element 623. In this case, the distance between the first transmission element 623 and the second transmission element 625 remains constant, that is, the magnitude of the action exerted by the second elastic element 624 remains constant, which helps to keep the first transmission element 623 and the second transmission element 625 axially pressed against the drive unit 61.

[0217] See in some examples Figure 7A or Figure 7BThe first transmission element 623 may have a first engagement feature 6231. The second transmission element 625 may have a second engagement feature 6251. In some examples, the first engagement feature 6231 may mate with the second engagement feature 6251. In this case, the mating of the first engagement feature 6231 and the second engagement feature 6251 helps to suppress relative rotation between the first transmission element 623 and the second transmission element 625.

[0218] Specifically, since the coupling between the first transmission element 623 and the second transmission element 625 and the drive unit 61 is a threaded coupling, the axial movement of the first transmission element 623 and the second transmission element 625 along the drive unit 61 needs to be achieved by rotating relative to the drive unit 61. Therefore, when the relative rotation of the first transmission element 623 and the second transmission element 625 is suppressed, the first transmission element 623 and the second transmission element 625 can be kept moving synchronously, and the distance between them remains unchanged. This helps the second elastic element 624 to maintain an energy storage state so as to continuously apply force to the first transmission element 623 and the second transmission element 625. However, when the first transmission element 623 and the second transmission element 625 move relative to each other, the distance between the first transmission element 623 and the second transmission element 625 changes (e.g., they move away from each other), which may cause the second elastic element 624 to no longer maintain an energy storage state, that is, no longer apply force to the first transmission element 623 and the second transmission element 625. Through the cooperation of the first engagement feature 6231 and the second engagement feature 6251, it is easy for the first transmission element 623 and the second transmission element 625 to remain relatively stationary.

[0219] See in some examples Figure 7A or Figure 7B At least a portion of the first transmission element 623 may be embedded in the second transmission element 625 (or at least a portion of the second transmission element 625 may be embedded in the first transmission element 623). In some examples, the first engagement feature 6231 and the second engagement feature 6251 may be complementary protrusion and groove structures.

[0220] In some examples, the drive unit 61 can be fixed to the base 2 (see reference 2). Figure 2A In some examples, the base 2 may have drive unit positioning holes (i.e., the third positioning hole 223 and the fourth positioning hole 233, described later). The drive unit positioning holes may be configured to position the drive unit 61. In some examples, the drive unit positioning holes may also be configured to fix the drive unit 61. In some examples, the drive unit 61 may be fitted into the interior of the base 2 (i.e., the hollow portion 21) through the drive unit positioning holes. This facilitates the drive unit 61 driving the carriage 42.

[0221] In some examples, the number of drive unit positioning holes can be at least one. Each drive unit 61 can be fixed to at least one drive unit positioning hole. For example, each drive unit 61 can be fixed to one or two drive unit positioning holes. Preferably, each end of each drive unit 61 can be fixed to two drive unit positioning holes respectively. This improves the stability of the drive unit 61's fixation.

[0222] In some examples, when there are multiple drive unit positioning holes, these holes can be arranged in pairs opposite to each other at the front and rear ends of the base 2. Specifically, the first end 22 may have a third positioning hole 223. The second end 23 may have a fourth positioning hole 233 (see...). Figure 2B The two ends of the drive unit 61 can be fixed to the third positioning hole 223 and the fourth positioning hole 233, respectively. The drive unit 61 is connected to the base 2 in such a way that it is positioned in the third positioning hole 223 and the fourth positioning hole 233. In this case, by providing the third positioning hole 223 and the fourth positioning hole 233, it is easy to position the drive unit 61. In addition, it helps the drive unit 61 to be parallel to the optical axis of the lens module 1, thereby driving the carriage 42 to move along the optical axis.

[0223] Figure 8A This is a schematic diagram showing the structure of the drive structure 6 involved in this utility model example. Figure 8B This is a schematic diagram showing the first bearing 63a involved in this utility model example. Figure 8C This is a schematic diagram showing the second bearing 63b involved in this utility model example. Figure 8A For clarity, the drive structure 6 has been simplified, but this should not be construed as a limitation of the present invention.

[0224] In some examples, the drive portion 61 may include a first threaded portion 611 (see [reference]). Figure 8A The transmission assembly 62 can be threadedly coupled to the first threaded portion 611. In some examples, the transmission assembly 62 can move on the first threaded portion 611. In some examples, the driving force generated by the drive unit 61 can be transmitted to the transmission assembly 62 through the first threaded portion 611.

[0225] In some examples, a bearing 63 may be provided at the end of the drive unit 61. In some examples, the drive unit 61 may include a fixing part 612 (see [reference]). Figure 8A The fixing part 612 can be configured to house the bearing 63. That is, the bearing 63 can be mounted on the fixing part 612. The fixing part 612 can be connected to the first threaded part 611. In some examples, the radial dimension of the fixing part 612 is smaller than the radial dimension of the first threaded part 611. In this case, the bearing 63 mounted on the fixing part 612 can abut against the end face of the first threaded part 611, thereby facilitating the positioning of the drive part 61 by the bearing 63.

[0226] In some examples, the bearing 63 may be disposed in the drive unit positioning hole. In some examples, the drive unit 61 may be positioned in the drive unit positioning hole via the bearing 63. Thus, the rotation of the drive unit 61 can be affected while it is positioned. It should be noted that positioning the drive unit 61 in the drive unit positioning hole may mean that the axial position of the drive unit 61 is limited, while the drive unit 61 can still rotate in the circumferential direction.

[0227] In some examples, the bearing 63 located at the front end (i.e., the first bearing 63a described later) can be a ball bearing. The bearing 63 located at the rear end (i.e., the second bearing 63b described later) can be a double angular contact ball bearing. This improves the rigidity of the bearing 63 and the precision of the fit between the bearing 63 and the drive unit 61.

[0228] In some examples, the drive unit 61 can be fixed to the base 2 by a bearing 63. Specifically, the outer ring of the bearing 63 can be fixed to the drive unit positioning hole (e.g., by snap-fit). The fixing part 612 can be provided in the inner ring of the bearing 63. The size of the inner ring of the bearing 63 matches the fixing part 612. This helps to define the position of the drive unit 61 and facilitates the rotation of the drive unit 61.

[0229] In some examples, the drive structure 6 may also include a threaded plug 64 (see...) Figure 8A A threaded plug 64 may be provided in the third positioning hole 223. In some examples, the threaded plug 64 may abut against the bearing 63. The threaded plug 64 can fix the bearing 63 by abutting against it. In this case, fixing the bearing 63 by the threaded plug 64 facilitates the fixing of the drive unit 61. In addition, by adjusting the position of the threaded plug 64, it is easy to adjust the axial force applied to the bearing 63, thereby reducing the possibility of over-tightening the bearing 63.

[0230] In other examples, the threaded plug 64 may also be provided in the fourth positioning hole 233 or in both the third positioning hole 223 and the fourth positioning hole 233.

[0231] In some examples, the threaded plug 64 may only abut against the outer ring of the bearing 63. Thus, by providing axial force to the outer ring of the bearing 63 through the threaded plug 64, the axial clearance between the outer and inner rings of the bearing 63 can be reduced, thereby suppressing undesirable movement of the drive unit 61 (e.g., axial runout). Furthermore, since the threaded plug 64 only abuts against the outer ring of the bearing 63 and does not contact the inner ring, it facilitates rotation of the inner ring relative to the outer ring.

[0232] See in some examples Figure 8B and Figure 8CThe inner diameter of bearing 63 can be smaller than the size of the first threaded portion 611. The inner diameter of the outer ring of bearing 63 is larger than the size of the first threaded portion 611. In this case, the end face of the first threaded portion 611 can abut against the inner ring of bearing 63 without abutting against the outer ring of bearing 63. Thus, when the inner ring of bearing 63 is positioned using the first threaded portion 611, an axial force is applied to the outer ring of bearing 63 through the threaded plug 64, causing the inner and outer rings of bearing 63 to be axially pressed together, thereby reducing the axial clearance between the outer and inner rings of bearing 63.

[0233] See in some examples Figure 8A Bearings 63 can be disposed at both ends of the first threaded portion 611. This further facilitates the rotation of the drive portion 61. For ease of description, the fixing portion 612 at the front end of the drive portion 61 is referred to as the first fixing portion 612a, the fixing portion 612 at the rear end of the drive portion 61 is referred to as the second fixing portion 612b, the bearing 63 disposed in the first fixing portion 612a is referred to as the first bearing 63a, and the bearing 63 disposed in the second fixing portion 612b is referred to as the second bearing 63b.

[0234] In some examples, the threaded plug 64 can be secured to the third locating hole 223 at the front end (see...). Figure 8B The threaded plug 64 can abut against the outer ring of the first bearing 63a. When the outer ring of the first bearing 63a abuts against the threaded plug 64, the inner ring of the first bearing 63a can abut against the end face of the front end of the first threaded portion 611. In some examples, the outer ring of the second bearing 63b can be fixed to the fourth positioning hole 233. In this case, the end face of the first threaded portion 611 abuts against the inner rings of the first bearing 63a and the second bearing 63b, respectively. The threaded plug 64 applies force to the outer ring of the first bearing 63a, and the force is transmitted through the inner ring of the first bearing 63a and the first threaded portion 611 to the inner ring of the second bearing 63b. During this process, the outer and inner rings of the first bearing 63a are axially pressed together, and the outer and inner rings of the second bearing 63b are axially pressed together, thereby suppressing undesirable movement of the drive unit 61.

[0235] In some examples, the drive structure 6 may include a resilient connector 65 (see...) Figure 8A or Figure 8BIn some examples, the drive unit positioning hole can be formed as an open hole. The resilient connector 65 can be disposed between the first bearing 63a and the threaded plug 64 (i.e., the first bearing 63a does not directly contact the threaded plug 64). In some examples, the resilient connector 65 can remain in an energy-storing state. In some examples, the resilient connector 65 in an energy-storing state can abut against the outer ring of the first bearing 63a. In this case, the resilient connector 65 in an energy-storing state continuously applies force to the outer ring of the first bearing 63a, thereby reducing the axial clearance between the outer and inner rings of the first bearing 63a. Furthermore, by controlling the deformation of the resilient connector 65, the magnitude of the force applied by the resilient connector 65 can be easily controlled, thereby reducing the possibility of a sudden increase in resistance or even jamming of the outer and inner rings of the bearing 63 due to excessive force. Additionally, since the force applied by the resilient connector 65 is elastic, it can buffer unwanted movement of the drive unit 61, thereby reducing the possibility of damage to the drive unit 61.

[0236] In some examples, the drive structure 6 may not include the threaded plug 64. In some examples, the drive unit positioning hole may be formed as a blind hole. The resilient connector 65 may be disposed between the first bearing 63a and the drive unit positioning hole. This facilitates the resilient connector 65 in maintaining an energy-storing state.

[0237] In other examples, the drive structure 6 may include a cylindrical block. The cylindrical block may replace the elastic connector 65 between the first bearing 63a and the threaded plug 64. In this case, the cylindrical block is more rigid and less prone to deformation than the elastic connector 65, thereby suppressing the wobbling of the drive unit 61.

[0238] See in some examples Figure 8A or Figure 8C The drive structure 6 may include a retaining sleeve 66. In some examples, the retaining sleeve 66 may be configured to secure the second bearing 63b to the fourth locating hole 233.

[0239] In some examples, the retaining sleeve 66 can be fixed to the fourth positioning hole 233. This facilitates the fixing of the second bearing 63b. In some examples, the retaining sleeve 66 can be threadedly coupled to the fourth positioning hole 233.

[0240] See in some examples Figure 8CThe fourth positioning hole 233 may have a positioning block 2331. The positioning block 2331 may be formed by protruding into the hole from the edge of the fourth positioning hole 233 near the first threaded portion 611. The inner diameter of the positioning block 2331 is larger than the outer diameter of the first threaded portion 611 and smaller than the inner diameter of the outer ring of the second bearing 63b. In this case, one side of the outer ring of the second bearing 63b may abut against the positioning block 2331, and the other side of the outer ring of the second bearing 63b may abut against the fixing sleeve 66, thereby fixing the position of the outer ring of the second bearing 63b between the positioning block 2331 and the fixing sleeve 66, thus achieving the position fixation of the second bearing 63b.

[0241] In some examples, the retaining sleeve 66 may abut against the second bearing 63b. Specifically, the retaining sleeve 66 may abut only against the outer ring of the second bearing 63b. This facilitates relative movement between the outer and inner rings of the second bearing 63b.

[0242] See in some examples Figure 8A or Figure 8C The drive structure 6 may include a fixing nut 67. The fixing nut 67 may be configured to position the drive unit 61. Specifically, the fixing nut 67 can position the drive unit 61 in the inner ring of the second bearing 63b, which can be fixed to the fourth positioning hole 233. Thus, the fixing nut 67 can position the drive unit 61.

[0243] See in some examples Figure 8A or Figure 8C The drive unit 61 may include a second threaded portion 613. The second threaded portion 613 may be connected to a second fixing portion 612b. In some examples, the second fixing portion 612b may be located between the first threaded portion 611 and the second threaded portion 613. This facilitates the positioning of the inner ring of the second bearing 63b by the fixing nut 67. Specifically, one side of the inner ring of the second bearing 63b may abut against the end face of the first threaded portion 611, and the other side may abut against the fixing nut 67, thereby positioning the inner ring of the second bearing 63b between the first threaded portion 611 and the fixing nut 67. The relative positions of the first threaded portion 611, the fixing nut 67, and the inner ring of the second bearing 63b are fixed, thereby preventing the second fixing portion 612b of the drive unit 61 from disengaging from the second bearing 63b.

[0244] In some examples, the retaining nut 67 may be threadedly coupled to the second threaded portion 613.

[0245] See in some examples Figure 8A or Figure 8C The fixing nut 67 can be disposed within the fixing sleeve 66. In some examples, the fixing nut 67 may not contact the fixing sleeve 66. This facilitates the rotation of the drive unit 61.

[0246] See in some examples Figure 8A or Figure 8C The size of the second threaded portion 613 can be smaller than or equal to the size of the second fixing portion 612b. This makes it easier to install the second bearing 63b on the second fixing portion 612b.

[0247] See in some examples Figure 8A The drive structure 6 may also include a power source 68. The power source 68 may be configured to provide driving force to the drive unit 61. The power source 68 may be an electric motor. For example, the power source 68 may be a brushed geared motor.

[0248] In some examples, the power source 68 can be located outside the base 2. This reduces the impact on the lens module 1 inside the base 2.

[0249] In some examples, the power source 68 may be connected to the drive unit 61. In some examples, when the power source 68 is located outside the base 2, the drive unit 61 may pass through the base 2 and be connected to the power source 68.

[0250] See in some examples Figure 8A The drive structure 6 may also include a coupling 69. The coupling 69 can connect the power source 68 and the drive unit 61. This reduces the wobbling of the drive unit 61.

[0251] In some examples, see [reference] Figure 2B The zoom device 10 may include a measuring structure 7. In some examples, the measuring structure 7 may be configured to measure the distance traveled by the carriage 42 (or the movable lens group 11).

[0252] In some examples, the measurement structure 7 may include a grating encoder 71 (see Figure 2B In some examples, the grating encoder 71 may include a grating ruler 711 (see [reference]). Figure 2C ) and reading head 712 (see Figure 2B The grating ruler 711 can be mounted on the carriage 42. The reading head 712 can be mounted on the base 2. This facilitates the measurement of the distance the carriage 42 moves relative to the base 2. It is understood that the reading head 712 can be positioned directly opposite the grating ruler 711 and correspond one-to-one. The base 2 has an opening at the position where the two are directly opposite each other. This facilitates the installation and operation of the reading head 712.

[0253] In some examples, each carriage 42 may be equipped with a linear encoder 711. In some examples, the linear encoder 711 may be fixed to the carriage 42 by dispensing adhesive. For example, see... Figure 2CThe grating ruler 711 can be mounted on the guide block 422. A dispensing nozzle can be formed on the side wall of the guide block 422. Therefore, when the grating ruler 711 is attached to the side wall of the guide block 422, it can be fixed by dispensing adhesive through the dispensing nozzle.

[0254] In some examples, the measurement structure 7 may include a second sensor 72 (see...) Figure 2B The second sensor 72 can be configured to sense the position of the carriage 42 when it moves to the zero position to generate a trigger signal. In this case, the trigger signal can be used to sense that the carriage 42 is at the zero position. This zero position can be used as a reference point for the movement of the carriage 42, and the position of the carriage 42 after movement can be determined based on this reference point and the distance the carriage 42 has moved.

[0255] Understandably, the zoom device 10 needs to mark the zero point position each time it is initialized or reset. In this case, the second sensor 72 can accurately determine the zero point position, improving the repeatability accuracy of the determined zero point position each time. That is, each time it is initialized or reset, the determined zero point position is made to be in the same position as much as possible.

[0256] In some examples, each carriage 42 can be equipped with a corresponding second sensor 72. This allows for precise positioning of each carriage 42, enabling accurate zooming.

[0257] In some examples, the second sensor 72 can be a position sensor.

[0258] In some examples, the second sensor 72 may be located at the front or rear end of the base 2 (i.e., the first end 22 or the second end 23). For example, see Figure 2B The second sensor 72 can be disposed on the upper side wall of the rear end (i.e., the second end 23) of the base 2. This facilitates sensing that the carriage 42 is in the zero position.

[0259] In other examples, the second sensor 72 may also be located at both the front and rear ends of the base 2.

[0260] In some examples, the second sensor 72 can be a non-contact sensor. This reduces the impact on the movement of the carriage 42.

[0261] In some examples, the non-contact sensor may be a photoelectric sensor. A photoelectric sensor may include a transmitter and a receiver. The transmitter may generate a transmitted signal, and the receiver may receive the transmitted signal. In some examples, the carriage 42 may have a baffle 425 (see...). Figure 2C or Figure 6The second sensor 72 can be configured to work in conjunction with the movement path of the baffle 425. When the carriage 42 moves to a certain position, the baffle 425 can enter between the transmitter and the receiver and block the transmission signal. When the receiver does not receive the transmission signal, the photoelectric sensor can generate a trigger signal (i.e., the baffle 425 triggers the photoelectric sensor). Therefore, based on whether the trigger signal is generated, it is easy to determine whether the carriage 42 is currently at the zero position.

[0262] In some examples, when the second sensor 72 is disposed on the upper sidewall of the second end 23, the baffle 425 may be disposed at the end of the guide block 422 near the second end 23. This facilitates the cooperation between the second sensor 72 and the baffle 425.

[0263] In other examples, the second sensor 72 may also be a contact sensor. The contact sensor may include a first contact element and a second contact element. The first and second contact elements may be respectively disposed on the carriage 42 and the base 2. In some examples, when the carriage 42 moves to the zero position, the first contact element may contact the second contact element. In some examples, when the first contact element contacts the second contact element, the contact sensor may generate a trigger signal. Thus, based on whether a trigger signal is generated, it is easy to determine whether the carriage 42 is at the zero position.

[0264] In this invention, the guide rod 41 guides the carriage 42, providing more stable guidance and improving the linearity of its movement. Furthermore, by integrally molding the base 2, its rigidity is increased, reducing deformation during the use of the zoom device 10. Compared to a split base 2, the integrally molded base 2 also reduces errors caused by assembly. Therefore, measurement accuracy is improved.

[0265] In summary, according to this utility model, a zoom device 10 that improves measurement accuracy can be provided.

[0266] Although the present invention has been specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the present invention in any way. Those skilled in the art can make modifications and variations to the present invention as needed without departing from the essential spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A zoom device comprising a base and a lens module configured to adjust a focal length, characterized in that, The zoom device further includes a connecting structure configured to assemble the lens module onto the base, and a driving structure for driving the lens module to move. The connecting structure includes a guide rod fixedly connected to the base, and a slide sleeved on the guide rod and configured to assemble the lens module. The driving structure includes a driving part and a transmission component coupled to the driving part and connected to the slide. The base is integrally formed.

2. The zoom device according to claim 1, characterized in that, The base has a cylindrical structure with a hollow section, the carriage is housed in the hollow section, and the guide rod is fixed to both ends of the base along the length of the base.

3. The zoom device according to claim 1 or 2, characterized in that, The base includes a first end, a second end, and a side portion that cooperates with the first end and the second end to form a hollow portion for accommodating the carriage. The first end has a first positioning hole, and the second end has a second positioning hole. The guide rod is fixedly connected to the base in such a way that it is positioned in the first positioning hole and the second positioning hole.

4. The zoom device according to claim 3, characterized in that, The first end also has a first functional hole that communicates with and is orthogonal to the first positioning hole, and the second end also has a second functional hole that communicates with and is orthogonal to the second positioning hole. A first fixing member and a second fixing member configured to fix the guide rod are respectively provided in the first functional hole and the second functional hole.

5. The zoom device according to claim 4, characterized in that, The guide rod has a first notch with a plane and a second notch with a plane at its two ends near the base, and the first fixing member and the second fixing member abut against the plane of the first notch and the plane of the second notch, respectively.

6. The zoom device according to claim 1, characterized in that, There are multiple guide rods and multiple carriages, with each carriage sleeved on multiple guide rods.

7. The zoom device according to claim 1, characterized in that, The drive unit is a lead screw, and the transmission assembly is threadedly coupled to the drive unit.

8. The zoom device according to claim 1 or 7, characterized in that, A bearing is provided at the end of the drive unit. The drive unit includes a fixed part configured to provide the bearing and a first threaded part coupled to the transmission assembly and connected to the fixed part. The size of the fixed part is not greater than the size of the first threaded part.

9. The zoom device according to claim 8, characterized in that, The base includes a first end, a second end, and a side portion that cooperates with the first end and the second end to form a hollow portion for accommodating the carriage. The first end has a third positioning hole, and the second end has a fourth positioning hole. The drive unit is connected to the base in a manner that positions itself in the third positioning hole and the fourth positioning hole. The drive structure includes a threaded plug disposed in the third positioning hole and a fixed sleeve disposed in the fourth positioning hole. The threaded plug and the fixed sleeve are configured to fix the bearing in a manner that abuts against the bearing.

10. The zoom device according to claim 9, characterized in that, The drive structure includes an elastic connector, which is disposed between the threaded plug and the bearing and maintains an energy storage state.

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