Zoom module for optical measuring instrument

Abstract

The invention provides a zoom module for an optical measuring instrument, which comprises a base and a lens module configured to adjust the focal length, and the lens module comprises a fixed lens group fixed on the base and a movable lens group capable of moving relative to the base, the zoom module further comprises a connecting structure configured to assemble the movable lens group on the base and a driving structure driving the movable lens group to move, the connecting structure comprises a guide rod fixed to the base and a sliding frame arranged on the guide rod in a sleeving mode and configured to assemble the movable lens group, and the driving structure comprises a driving part and a transmission assembly coupled with the driving part. The transmission assembly is movably connected to the sliding frame in the mode that the transmission assembly can move along a preset plane, and the preset plane is orthogonal to the axial direction of the guide rod. According to the zoom module for the optical measuring instrument, the control precision can be improved.

Description

[0001] This application is a divisional application of the patent application with the application number 2025111856409, the application date of August 22, 2025, and the invention title of Zoom device for optical measuring instrument. TECHNICAL FIELD

[0002] The present disclosure relates to the field of intelligent manufacturing equipment industry, in particular to a zoom module for optical measuring instrument. BACKGROUND

[0003] A laser tracker is a three-dimensional measuring device, which is widely used in industrial manufacturing, aerospace, and automobile manufacturing, etc. large assembly fields. It realizes large range and high precision three-dimensional measurement through laser ranging technology. The laser tracker usually includes a camera, which can be used to obtain the attitude information of the measured object, thereby assisting the laser tracker to realize accurate positioning, real-time tracking, and high-precision measurement of the target object.

[0004] The camera usually has a zoom function to meet the measurement scene of different distances and different sizes of measured objects. A zoom module and a driving mechanism are generally provided in the camera. The movable lens group in the zoom module is driven to move by the driving mechanism to change the focal length of the zoom module so that the camera can be aligned, enlarged or reduced to the measured object, thereby obtaining a clear image of the measured object.

[0005] However, the driving mechanism usually deforms or swings, which causes the zoom module connected with the driving mechanism to be affected by the deformation or swing of the driving mechanism, and further causes the control precision of the zoom module to decrease. SUMMARY

[0006] The present disclosure is proposed in view of the above-mentioned prior art, and aims to provide a zoom device for optical measuring instrument which can improve the control precision.

[0007] To this end, the present disclosure provides a zoom device for an optical measuring instrument, the zoom device comprising a base and a lens module configured to adjust a focal length, the lens module comprising a fixed lens group fixed to the base and a movable lens group movable relative to the base, the zoom device further comprising a connecting structure configured to assemble the movable lens group to the base, and a driving structure configured to drive the movable lens group to move, the connecting structure comprising a guide rod fixed to the base and a sliding carriage sleeved to the guide rod and configured to assemble the movable lens group, the driving structure comprising a driving part and a transmission assembly coupled to the driving part and connected to the sliding carriage, the transmission assembly being movably connected to the sliding carriage along a preset plane, the preset plane being orthogonal to an axial direction of the guide rod, the transmission assembly comprising a first connecting member, the sliding carriage comprising a second connecting member, the first connecting member having a connecting hole, the second connecting member comprising a connecting column matched with the connecting hole and extending along the axial direction of the guide rod.

[0008] In the present disclosure, when the driving part generates an undesired motion transmitted to the transmission assembly, the transmission assembly can reduce the influence of the undesired motion generated by the driving part on the sliding carriage by moving relative to the sliding carriage along the preset plane, thereby improving the optical axis consistency of the lens module. In addition, by matching the connecting hole with the connecting column, the connection between the first connecting member and the second connecting member can be facilitated, i.e., the risk of disconnection between the first connecting member and the second connecting member can be reduced. Thus, the control accuracy of the zoom device can be improved.

[0009] In addition, in the zoom device for an optical measuring instrument related to the present disclosure, optionally, the connecting hole is a waist-shaped hole, the length of the waist-shaped hole is greater than the outer diameter of the connecting column, and the width of the waist-shaped hole is the same as the outer diameter of the connecting column. In this case, the width dimension of the waist-shaped hole can limit the movable space of the first connecting member in the width direction and facilitate the sliding of the first connecting member in the length direction.

[0010] In addition, in the zoom device for an optical measuring instrument related to the present disclosure, optionally, the transmission assembly abuts against the sliding carriage along the axial direction of the guide rod. Thus, the control accuracy of the motion of the sliding carriage in the axial direction of the guide rod can be improved.

[0011] In addition, in the zoom device for an optical measuring instrument according to the present disclosure, optionally, the second connecting member comprises a base plate configured to abut against the transmission assembly, the connecting column is formed on the base plate, and a first elastic element configured to apply a first force to the first connecting member to make the transmission assembly abut against the base plate and a cover plate configured to compress the first elastic element are arranged on a side of the first connecting member away from the base plate. In this case, the first elastic element in the energy storage state can improve the stability of the abutment between the transmission assembly and the base plate by applying a force to the transmission assembly, and can buffer the unwanted movement of the transmission assembly, thereby reducing the possibility of the transmission assembly being stuck with the slide rail. In addition, the cover plate can help the first elastic element to maintain the energy storage state.

[0012] In addition, in the zoom device for an optical measuring instrument according to the present disclosure, optionally, the cover plate is detachably fixed to the base plate, and the first elastic element is further configured to apply a second force and a third force to the first connecting member and the second connecting member respectively to make the transmission assembly abut against the driving part and the slide rail abut against the guide rod. In this case, by making the transmission assembly abut against the driving part, the gap between the transmission assembly and the driving part in the radial direction can be reduced, thereby reducing the possibility of the transmission assembly shaking and improving the transmission accuracy of the transmission assembly; by making the slide rail abut against the guide rod, the gap between the slide rail and the guide rod in the radial direction can be reduced, thereby reducing the possibility of the slide rail shaking and improving the positioning accuracy of the slide rail.

[0013] In addition, in the zoom device for an optical measuring instrument according to the present disclosure, optionally, the cover plate has a plurality of functional holes configured to adjust and fix the first elastic element. In this case, by fixing the first elastic element to different functional holes, the second force and the third force can be easily adjusted.

[0014] In addition, in the zoom device for an optical measuring instrument according to the present disclosure, optionally, the base plate is formed with a connecting groove, and the connecting column is formed on the bottom surface of the connecting groove. When the connecting hole cooperates with the connecting column, the first connecting member is located in the connecting groove. Thus, the possibility of the first connecting member being separated from the second connecting member can be further reduced, thereby helping to maintain the abutment state of the first connecting member and the second connecting member.

[0015] In addition, in the zoom device for an optical measuring instrument according to the present disclosure, optionally, a measurement structure configured to measure the distance of the movement of the slide rail is further included, and the measurement structure comprises a grating encoder, which comprises a grating ruler arranged on the slide rail and a reading head arranged on the base. Thus, the distance of the movement of the slide rail relative to the base can be easily measured.

[0016] In addition, in the zoom device for optical measuring instruments according to the present disclosure, the driving part is a screw rod, and the transmission assembly is a nut matched with the screw rod. In this case, the transmission precision can be improved by screw rod transmission.

[0017] In addition, in the zoom device for optical measuring instruments according to the present disclosure, the transmission assembly is threadedly coupled with the driving part, and the transmission assembly is provided with a ball. Alternatively, the transmission assembly further comprises a second elastic element, a first transmission element and a second transmission element threadedly coupled with the driving part. The second elastic element is arranged between the first transmission element and the second transmission element which is relatively static with the first transmission element and is kept in an energy storage state. In this case, when the transmission assembly is provided with a ball, the friction coefficient and noise between the transmission assembly and the driving part can be reduced, the possibility of self-locking of adjacent carriages after collision can be reduced, and the gap between the transmission assembly and the driving part can be reduced by adjusting the size of the ball. When the transmission assembly comprises a second elastic element, a first transmission element and a second transmission element, the first transmission element and the second transmission element are relatively axially pressed against the driving part under the action of the second elastic element which is kept in an energy storage state, the gap between the first transmission element, the second transmission element and the driving part is reduced, and the control precision is improved.

[0018] According to the present disclosure, a zoom device for optical measuring instruments with improved control precision can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present disclosure will now be explained in further detail by way of example only with reference to the accompanying drawings.

[0020] Figure 1 FIG. 1 is a diagram showing the application scenario of an optical measuring instrument according to an example of the present disclosure.

[0021] Figure 2A FIG. 2 is a structural schematic diagram of a zoom device according to an example of the present disclosure.

[0022] Figure 2B FIG. 3 is a structural schematic diagram of a base according to an example of the present disclosure.

[0023] Figure 2C FIG. 4 is a schematic diagram showing that a movable mirror assembly is assembled on a carriage according to an example of the present disclosure.

[0024] Figure 2D FIG. 5 is a schematic diagram showing that a carriage is sleeved on a guide rod according to an example of the present disclosure.

[0025] Figure 2Eis a schematic view showing a first positioning hole and a second positioning hole according to an example of the present disclosure.

[0026] Figure 3A is a schematic view showing Figure 2D is an enlarged schematic view of the A region in

[0027] Figure 3B is a schematic view showing Figure 3A is a sectional view along the line X-X in

[0028] Figure 3C is a schematic view showing Figure 3A is a sectional view along the line Y-Y in

[0029] Figure 3D is a schematic view showing a first elastic member and a second elastic member according to an example of the present disclosure.

[0030] Figure 3E is a schematic view showing a structure of a second embodiment of a first connecting mechanism according to an example of the present disclosure.

[0031] Figure 4 is a schematic view showing a guide block arranged in a diagonal direction according to an example of the present disclosure.

[0032] Figure 5 is a schematic view showing two carriages arranged in a central symmetry according to an example of the present disclosure.

[0033] Figure 6 is an exploded view showing a carriage and a transmission assembly according to an example of the present disclosure.

[0034] Figure 7A is a schematic view showing a structure of a second embodiment of a transmission assembly according to an example of the present disclosure.

[0035] Figure 7B is a schematic view showing a second elastic element according to an example of the present disclosure.

[0036] Figure 8A is a schematic view showing a driving structure according to an example of the present disclosure.

[0037] Figure 8B is a schematic view showing a first bearing according to an example of the present disclosure.

[0038] Figure 8C is a schematic view showing a second bearing according to an example of the present disclosure. DETAILED DESCRIPTION

[0039] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same components are designated by the same reference numerals, and repetitive description will be omitted. In addition, the accompanying drawings are schematic views, and the ratio of the dimensions between components or the shape of the components, etc. can be different from reality.

[0040] It should be noted that the terms "comprising" and "having" and any variations thereof, such as a process, method, system, product, or apparatus including or having a series of steps or units, are not necessarily limited to those steps or units clearly listed, but can include or have other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatuses. In this document, relative position and relative direction terms such as "above", "below", "left", "right", "front", "back", etc. are with reference to the usual operating posture, and should not be considered as limiting.

[0041] First, the related terms involved in the present disclosure are introduced. The "control accuracy" can refer to the accuracy of controlling the movable lens group to move to a predetermined position. The higher the control accuracy, the closer the position moved by the movable lens group to the predetermined position. The "control accuracy" can also refer to the accuracy of controlling the movable lens group to move a predetermined distance, and the higher the control accuracy, the closer the distance moved by the movable lens group to the predetermined distance. The "floating connection" can refer to a dynamically adjustable connection. For example, the floating connection of the slide and the guide rod can refer to that the relative position of the slide and the guide rod can be dynamically adjusted.

[0042] The zoom device involved in the examples of the present disclosure can be used in an optical measuring instrument, and by accurately controlling the movable lens group to move to a predetermined position or to move a predetermined distance, the control accuracy is improved, thereby helping the optical measuring instrument to accurately position the target. In some examples, the optical measuring instrument involved in the present disclosure can 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 involved in the present disclosure can also be referred to as a zoom module, a zoom system, or a camera, etc.

[0043] The zoom device involved in the examples of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0044] Figure 1 is a diagram showing an application scenario of an optical measuring instrument 100 involved in the examples of the present disclosure.

[0045] In some examples, referring to Figure 1The optical measurement instrument 100 can measure the target 200. In some examples, the optical measurement instrument 100 can be configured to emit a light beam to the target 200. The target 200 can reflect the received light beam back to the optical measurement instrument 100. In some examples, the optical measurement instrument 100 can measure the target 200 based on the light beam reflected by the target 200.

[0046] In some examples, the optical measurement instrument 100 can measure the spatial coordinates and the spatial pose of the target 200. In some examples, the optical measurement instrument 100 can also identify the target 200 based on the light beam reflected by the target 200. In some examples, the optical measurement instrument 100 can also track the target 200 based on the light beam reflected by the target 200. In some examples, the optical measurement instrument 100 can be a laser tracker, a laser radar, or a total station, etc.

[0047] In some examples, referring to Figure 1 The optical measurement instrument 100 can have the zoom device 10. In some examples, the zoom device 10 can be configured to acquire the spatial pose of the target 200. In some examples, the zoom device 10 can acquire the spatial pose of the target 200 by acquiring an image of the target 200. In this way, it can be helpful for the optical measurement instrument 100 to measure the spatial pose of the target 200.

[0048] In some examples, the zoom device 10 can have a zoom function. That is, the zoom device 10 can adjust its focal length. In some examples, the zoom device 10 can adjust its focal length to achieve alignment, magnification or reduction of the target 200. In this way, it can be helpful for the zoom device 10 to acquire a clear image of the target 200 in different measurement scenarios.

[0049] Figure 2A is a structural schematic diagram of the zoom device 10 involved in the examples of the present disclosure. Figure 2B is a structural schematic diagram of the base 2 involved in the examples of the present disclosure. Figure 2C is a schematic diagram showing that the movable mirror group 11 of the zoom device 10 is assembled on the carriage 42.

[0050] In some examples, referring to Figure 2A The zoom device 10 can include the lens module 1. The lens module 1 can be configured to adjust the focal length.

[0051] As described above, the zoom device 10 can acquire an image of the target 200. In some examples, the lens module 1 can acquire the image of the target 200. In some examples, the image acquired by the lens module 1 can be a light signal (hereinafter referred to as a first light signal) containing the spatial pose information of the target 200. In this way, it can be convenient to acquire the spatial pose of the target 200.

[0052] In some examples, referring to Figure 2A The base 2 can be configured to carry the lens module 1. In some examples, the base 2 can be integrally formed. In this way, the rigidity of the base 2 can be improved, thereby improving the stability of the zoom device 10. In addition, the assembly error when assembling other components (e.g. the lens module 1) into the base 2 can be reduced.

[0053] In other examples, the base 2 can also be separately formed. In this way, it can be convenient to assemble other components (e.g. the lens module 1) into the interior of the base 2.

[0054] In some examples, referring to Figure 2B The base 2 can have a hollow portion 21. The hollow portion 21 can be configured to accommodate the lens module 1. In some examples, the base 2 can have a cylindrical structure. In this way, more sufficient movement space can be provided for the lens module 1.

[0055] In some examples, referring to Figure 2B The base 2 can include a first end portion 22 and a second end portion 23. The first end portion 22 can be located at the front end of the base 2. The second end portion 23 can be located at the rear end of the base 2. The first end portion 22 can be opposite to the second end portion 23.

[0056] In some examples, referring to Figure 2B The base 2 can also include a side portion 24. The side portion 24 can cooperate with the first end portion 22 and the second end portion 23 to form the hollow portion 21.

[0057] In some examples, referring to Figure 2B The base 2 can have a first opening 25. The lens module 1 can be assembled into the interior of the base 2 through the first opening 25. In some examples, the first opening 25 can be located above the base 2. In this way, it can be convenient to assemble the lens module 1.

[0058] In some examples, the base 2 can have a second opening. The second opening can be located below the base 2. In some examples, the lens module 1 can also be assembled into the interior of the base 2 from the second opening. In the case that the guide block 422 (described later) is relatively long, the lens module 1 can be conveniently assembled through the second opening below the base 2.

[0059] In some examples, referring to Figure 2B The base 2 can have a third opening 26. The third opening 26 can be located at the sidewall (i.e. the side portion 24) of the base 2. In this way, it can be convenient to debug the lens module 1 inside the base 2. In some examples, the size of the third opening 26 can be determined according to factors such as the rigidity of the base 2 and the size of the components assembled into the base 2.

[0060] In some examples, the two opposite sidewalls of the base 2 can each be provided with a third opening 26. In this case, when the movable lens group 11 (to be described later) is multiple, the installation of the movable lens group 11 and the driving structure 6 (to be described later) matched with each movable lens group 11 can be assisted from the two third openings 26 respectively, so as to reduce the difficulty of installation.

[0061] In some examples, the zoom device 10 can include a shielding film configured to shield the third opening 26. Thus, after the assembly and adjustment of the lens module 1 are completed, the influence of external factors (such as dust or water vapor) on the lens module 1 can be reduced.

[0062] In some examples, the zoom device 10 can include a first sensor 3 (see Figure 2A or Figure 2B ). The first sensor 3 can be configured to receive a signal (such as a first optical signal). Thus, the image of the target 200 can be obtained and transmitted conveniently. In some examples, the first sensor 3 can be an optical sensing element.

[0063] In some examples, referring to Figure 2B , the first sensor 3 can be assembled to the base 2. The base 2 can further include a first boss 27. The first boss 27 can be formed at the rear end of the base 2. The first sensor 3 can be fixed to the first boss 27. Thus, the first sensor 3 can receive the signal from the lens module 1 conveniently. In some examples, the inside of the first boss 27 can be a hollow structure, and the photosensitive coupling component on the first sensor 3 at the rear end can be arranged opposite to the lens module 1 arranged at the front end, so as to receive the signal from the lens module 1 conveniently.

[0064] In some examples, the lens module 1 can include a movable lens group 11 (see Figure 2C ). The movable lens group 11 can move relative to the base 2. Thus, the focal length of the lens module 1 can be adjusted conveniently.

[0065] In some examples, the number of the movable lens group 11 can be at least one. For example, the number of the movable lens group 11 can be one, two, three, four or five. In some examples, when the number of the movable lens group 11 is one, the movable lens group 11 can be moved relative to the base 2 to adjust the focal length. In some examples, when the number of the movable lens group 11 is multiple, one or more movable lens groups 11 can be moved relative to the base 2 simultaneously to adjust the focal length.

[0066] In some examples, referring to Figure 2AThe lens module 1 can include a fixed lens group 12. The fixed lens group 12 can be fixed to the base 2. In the embodiment, the fixed lens group 12 is fixed in the base 2, and can provide basic optical performance for the entire optical system, and to a certain extent, optimize the imaging quality, improve the definition, contrast, and resolution of the image, and can work with the movable lens group 11 to achieve good imaging effect of the zoom device 10 at different focal lengths.

[0067] 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. For another example, the number of fixed lens groups 12 can be two, and 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 fixed to the front end or the rear end of the base 2.

[0068] In the present disclosure, the number of fixed lens groups 12 is two, and the two fixed lens groups 12 are fixed to the front end and the rear end of the base 2, which is described as an example, but this should not be understood as a limitation of the present disclosure.

[0069] In some examples, the front end of the base 2 has a through hole configured to fit the fixed lens group 12. In some examples, the fixed lens group 12 can be fitted in the through hole of the front end of the base 2 and the inside of the first boss 27 of the rear end of the base 2 respectively.

[0070] In some examples, referring to Figure 2A The zoom device 10 can include a connecting structure 4. The connecting structure 4 can be configured to fit the movable lens group 11 to the base 2.

[0071] In some examples, the connecting structure 4 can connect the movable lens group 11 and the base 2. In some examples, the movable lens group 11 can be movably connected to the base 2 through the connecting structure 4. Thus, the movement of the movable lens group 11 relative to the base 2 can be facilitated.

[0072] In some examples, the connecting structure 4 can include a guide rod 41 (see Figure 2A ). In some examples, the guide rod 41 can be configured to guide the movable lens group 11. Thus, the movement of the movable lens group 11 along the predetermined path planned by the guide rod 41 can be facilitated. In some examples, the predetermined path can refer to the desired movement path of the movable lens group 11. The guide rod 41 can extend along the predetermined path. The movable lens group 11 can move along the extension direction (also referred to as the axial direction) of the guide rod 41.

[0073] In some examples, referring to 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 the length direction of the base 2. 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. In this way, more sufficient movement space can be provided for the movable lens group 11.

[0074] In some examples, the connecting structure 4 can include a slide 42 (see Figure 2A ). The slide 42 can be configured to assemble (or carry) the lens module 1. Specifically, the slide 42 can be configured to assemble (or carry) the movable lens group 11. In some examples, the movable lens group 11 can be fixed to the slide 42 (see Figure 2C ).

[0075] In some examples, the slide 42 can be accommodated in the hollow portion 21. In this way, more sufficient movement space can be provided for the slide 42.

[0076] In some examples, the guide rod 41 can also be configured to position and guide the slide 42. The slide 42 can be connected to the guide rod 41 (for example, sleeved on the guide rod 41). The movable lens group 11 can be connected to the guide rod 41 through the slide 42. In this case, compared with the movable lens group 11 being directly connected to the guide rod 41, the movable lens group 11 being connected to the guide rod 41 through the slide 42 can facilitate the protection of the movable lens group 11 and can improve the smoothness of the movement of the movable lens group 11. Among them, the higher the smoothness of the movement of the movable lens group 11 (or the slide 42) along the guide rod 41, the lower the possibility of the movable lens group 11 (or the slide 42) being stuck.

[0077] In some examples, referring to Figure 2C , the slide 42 can have a ring-shaped carrying structure. For example, the ring-shaped carrying structure can have a circular ring shape. In this way, the assembly of the movable lens group 11 can be facilitated.

[0078] 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. One slide 42 can be sleeved on at least one guide rod 41. In some examples, the number of slides 42 can be at least one. For example, the number of slides 42 can be one, two, three, or four. One slide 42 can carry at least one movable lens group 11.

[0079] Figure 2D is a schematic view showing that the slide 42 of the example of the present disclosure is sleeved on the guide rod 41.

[0080] In some examples, referring to Figure 2D, each sliding carriage 42 can be sleeved on a plurality of guide rods 41. In this way, the twisting of the sliding carriage 42 can be inhibited, thereby helping to improve the consistency of the optical axis. It can be understood that the number of guide rods 41 sleeved on one sliding carriage 42 can be selected according to requirements. For example, the number of guide rods 41 can be selected according to the requirements for the linearity of the movement of the sliding carriage 42 and the reliability of the zoom device 10, or can be selected according to the machining accuracy and assembly accuracy of each component (for example, the sliding carriage 42 and the guide rod 41). Preferably, the number of guide rods 41 sleeved on one sliding carriage 42 can be two, thereby reducing the assembly difficulty while improving the linearity of the movement of the sliding carriage 42.

[0081] As described above, the guide rod 41 can be fixed to the base 2 (see Figure 2A ). In some examples, the base 2 can have guide rod positioning holes (that is, the first positioning hole 221 and the second positioning hole 231 described later). The guide rod positioning hole can be configured to position the guide rod 41. In some examples, the guide rod positioning hole can also be configured to fix the guide rod 41. In some examples, the guide rod 41 can be assembled inside (that is, the hollow part 21) of the base 2 through the guide rod positioning hole.

[0082] In some examples, the positions of the guide rod positioning holes can match the positions of the fixed lens group 12. Matching can mean that when the guide rod 41 is fixed to the guide rod positioning hole and the sliding carriage 42 is sleeved on the guide rod 41, the optical axis of the movable lens group 11 assembled on the sliding carriage 42 coincides with the optical axis of the fixed lens group 12 assembled on the base 2. In this way, it can help to improve the consistency of the optical axis, thereby improving the clarity of the image (for example, the image of the target 200) and the measurement accuracy.

[0083] In some examples, the number of guide rod positioning holes can be at least one. One guide rod 41 can be fixed to at least one guide rod positioning hole. For example, one guide rod 41 can have only one end fixed to one guide rod positioning hole. For another example, both ends of one guide rod 41 can be fixed to two guide rod positioning holes, respectively. In this way, the guide rod 41 can be more stably fixed.

[0084] Figure 2E is a schematic diagram showing the first positioning hole 221 and the second positioning hole 231 involved in the examples of the present disclosure.

[0085] In some examples, when the number of guide rod positioning holes is a plurality, the plurality of guide rod positioning holes can be arranged opposite to each other at the front end and the rear end of the base 2. Specifically, see Figure 2B , the first end portion 22 can have the first positioning hole 221. The second end portion 23 can have the second positioning hole 231. Both ends of the guide rod 41 can be fixed to the first positioning hole 221 and the second positioning hole 231, respectively. In this way, it can help the guide rod 41 to be parallel to the optical axis of the fixed lens group 12.

[0086] In some examples, referring to Figure 2B The first end 22 can further have a first functional hole 222. The first functional hole 222 can be in communication with the first positioning hole 221. In some examples, a first fixing member 43a (see Figure 2E ) can be arranged in the first functional hole 222. The first fixing member 43a can be configured to fix the guide rod 41. Thus, the guide rod 41 can be fixed conveniently.

[0087] In some examples, referring to Figure 2E The first functional hole 222 can be orthogonal to the first positioning hole 221. Thus, the fixing effect of the first fixing member 43a can be improved.

[0088] In some examples, referring to Figure 2E The second end 23 can further have a second functional hole 232. The second functional hole 232 can be in communication with the second positioning hole 231. In some examples, a second fixing member 43b can be arranged in the second functional hole 232. The second fixing member 43b can be configured to fix the guide rod 41. Thus, the guide rod 41 can be fixed conveniently.

[0089] In some examples, referring to Figure 2E The second functional hole 232 can be orthogonal to the second positioning hole 231. Thus, the fixing effect of the second fixing member 43b can be improved.

[0090] In some examples, the first fixing member 43a and the second fixing member 43b can be insertion rods. The portion of the guide rod 41 fixed to the first positioning hole 221 and the second positioning hole 231 can have an insertion hole. In this case, the first fixing member 43a and the second fixing member 43b can fix the guide rod 41 by being inserted into the insertion hole.

[0091] In some examples, the first fixing member 43a and the second fixing member 43b can be jackscrews. 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 in abutment with the guide rod 41. Thus, the guide rod 41 can be fixed to the first positioning hole 221 and the second positioning hole 231 conveniently, and the guide rod 41 can be fixed more firmly. Hereinafter, the first fixing member 43a and the second fixing member 43b are taken as jackscrews for description.

[0092] In some examples, referring to Figure 2E The guide rod 41 can have a first notch 411a and a second notch 411b. When the guide rod 41 is fixed to the first positioning hole 221, the first notch 411a can be located in the first positioning hole 221. When the guide rod 41 is fixed to the second positioning hole 231, the second notch 411b can be located in the second positioning hole 231. Thus, the guide rod 41 can be fixed conveniently.

[0093] In other examples, the guide rod 41 can also have only the first notch 411a or the second notch 411b. In this way, the machining of the guide rod 41 can be facilitated.

[0094] In some examples, referring to Figure 2E , the first notch 411a can be formed with a flat surface. The flat surface formed by the first notch 411a is a 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. The flat surface formed by the second notch 411b is a 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 contact, which can more stably fix the guide rod 41 and inhibit the rotation of the guide rod 41, improving the reliability of the fixation of the guide rod 41, compared with point contact.

[0095] In other examples, the guide rod 41 can also not have the first functional hole 222, the second functional hole 232, the first fixing member 43a, the second fixing member 43b, the first notch 411a, and the second notch 411b. 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, for example, glue dispensing, clamping, or welding.

[0096] In order to improve the linearity of the movement of the carriage 42 and inhibit the torsion of the carriage 42, one carriage 42 is usually sleeved on at least two guide rods 41. In this case, due to the influence of factors such as machining and assembly errors, the plurality of guide rods 41 will usually over-position the carriage 42, causing the carriage 42 to be stuck or the friction between the carriage 42 and the guide rods 41 to be too large, resulting in too low smoothness of the movement of the carriage 42. Therefore, the present disclosure also proposes a floating connection structure of the carriage 42 and the guide rod 41, which can reduce the influence of the over-positioning of the guide rod 41. The following describes an example in which one carriage 42 is sleeved on two guide rods 41, but this should not be understood as a limitation of the present disclosure, and the present disclosure is also applicable to the scenario in which one carriage 42 is sleeved on other numbers of guide rods 41.

[0097] In some examples, the carriage 42 can include a first connecting mechanism 421 (see Figure 2D). In some examples, the first connecting mechanism 421 can be connected with the guide rod 41. That is, the sliding carriage 42 can be connected with the guide rod 41 through the first connecting mechanism 421. In some examples, the sliding carriage 42 can be floatingly connected with the guide rod 41. In some examples, the first connecting mechanism 421 can be floatingly connected with the guide rod 41. In this case, by floatingly connecting the sliding carriage 42 with the guide rod 41 through the first connecting mechanism 421, the sliding carriage 42 can be adapted to the position of the guide rod 41, and the possibility of the sliding carriage 42 being stuck with the guide rod 41 can be reduced, thereby improving the reliability of the zoom device 10. In the present disclosure, the adaptive connection can refer to the sliding carriage 42 being connected with the guide rod 41 through the first connecting mechanism 421 in a manner of automatically adapting to the position of the guide rod 41.

[0098] Specifically, the sliding carriage 42 needs to abut against the guide rod 41 to be guided by the guide rod 41. Therefore, appropriate abutment force can help the sliding carriage 42 to keep abutting against the guide rod 41 during movement, and can also inhibit the sliding carriage 42 from shaking relative to the guide rod 41. However, when the abutment force is too large (for example, in the case of over-positioning or deformation of the guide rod 41), the friction between the sliding carriage 42 and the guide rod 41 is intensified, and the possibility of the sliding carriage 42 being stuck with the guide rod 41 is increased. Under the action of the first connecting mechanism 421, the sliding carriage 42 can not only adapt to the position of the guide rod 41, but also keep abutting against the guide rod 41 with appropriate abutment force to eliminate the gap therebetween, thereby reducing the possibility of the sliding carriage 42 being stuck, and enabling the sliding carriage 42 to move under the guidance of the guide rod 41. For ease of description, the guide rod 41 floatingly connected with the sliding carriage 42 is referred to as the first guide rod 41a.

[0099] In some examples, referring to Figure 2D , the first connecting mechanism 421 can be sleeved on the first guide rod 41a. In some examples, the first connecting mechanism 421 can include an opening portion 4211. The opening portion 4211 can be configured to be sleeved on the first guide rod 41a. In this way, the connection of the first connecting mechanism 421 with the first guide rod 41a can be facilitated.

[0100] As described above, the number of guide rods 41 sleeved on the same sliding 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 according to the number of guide rods 41 sleeved on the sliding carriage 42. For example, when the number of guide rods 41 sleeved is two, the number of first connecting mechanisms 421 can be one (see Figure 2D ). For another example, when the number of guide rods 41 sleeved is three, the number of first connecting mechanisms 421 can be two.

[0101] In some examples, the zoom device 10 can include a floating member 5 (see Figure 2D ). In some examples, the floating member 5 can abut against the first guide rod 41a. For ease of understanding,Figure 2D It is also shown that the floating member 5 abuts against the portion of the first guide rod 41a located in the first connecting mechanism 421.

[0102] In some examples, the floating member 5 can float with the position of the first guide rod 41a in the opening portion 4211. That is, the floating member 5 can float to adapt to the position of the first guide rod 41a in the opening portion 4211. In this case, the floating member 5 abuts against the first guide rod 41a located at any position in the opening portion 4211 by floating, so that the first connecting mechanism 421 can adapt to the position of the first guide rod 41a, thereby reducing the possibility of the carriage 42 being stuck due to the first guide rod 41a over-positioning the carriage 42, and 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 being in floating connection with the first guide rod 41a.

[0103] It can be understood that the radial dimension of the opening portion 4211 is greater than the radial dimension of the first guide rod 41a. In this case, when the first guide rod 41a passes through the opening portion 4211, there is a gap between the first guide rod 41a and the opening portion 4211. Since the first guide rod 41a is fixed to the base 2 through the first positioning hole 221, that is, the position of the first guide rod 41a is limited by the first positioning hole 221, the larger radial dimension of the opening portion 4211 can provide more space for accommodating the first guide rod 41a, thereby reducing the requirement for the machining precision 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 portion 4211 to deviate from the predetermined position to some extent, and inhibit the first guide rod 41a from generating excessive abutting force due to excessive extrusion of the side wall of the opening portion 4211.

[0104] In order to improve the optical axis consistency of the lens module 1, the position of the carriage 42 in the radial direction of the guide rod 41 relative to the base 2 should be fixed as much as possible, that is, the carriage 42 should not shake or twist as much as possible in the radial direction. By abutting the first guide rod 41a through the floating member 5, the gap between the first guide rod 41a and the opening portion 4211 can be eliminated, the shaking of the carriage 42 relative to the guide rod 41 can be inhibited, the linearity of the movement of the carriage 42 can be improved, and the optical axis consistency can be improved.

[0105] In some examples, the floating member 5 can be arranged around the opening portion 4211. In some examples, the floating member 5 can be arranged around the opening portion 4211 in a floating manner. In this way, the floating member 5 can abut against the first guide rod 41a in the opening portion 4211.

[0106] In some examples, the floating member 5 can be disposed at least partially between the opening portion 4211 and the first guide rod 41a. In some examples, the floating member 5 can be disposed at least partially between the opening portion 4211 and the first guide rod 41a in a manner of abutting the first guide rod 41a. In this way, the floating connection between the first connecting mechanism 421 and the first guide rod 41a can be facilitated.

[0107] 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 the first guide rod 41a after corresponding movement according to the position of the first guide rod 41a in the opening portion 4211. In different zoom devices 10, due to the influence of factors such as machining errors of the first positioning hole 221, the positions of the guide rods 41 in the opening portion 4211 can be different from each other, and the floating member 5 can move different distances while maintaining abutment with the guide rods 41 according to the positions of the guide rods 41 in the opening portion 4211, thereby being able to automatically adapt (i.e., self-adapt) to any position of the guide rods 41 in the opening portion 4211 to guide the carriages 42.

[0108] In some examples, the floating member 5 can also be configured to relatively fix the first connecting mechanism 421 and the first guide rod 41a. In this way, the shaking of the carriage 42 relative to the first guide rod 41a can be inhibited.

[0109] In some examples, the floating member 5 can be configured to relatively fix the first connecting mechanism 421 and the first guide rod 41a in a preset direction. In some examples, the floating member 5 can abut the first guide rod 41a in the preset direction. The preset direction can mean the radial direction of the first guide rod 41a. In this case, since the direction of the abutting force is the radial direction of the first guide rod 41a, the position of the floating member 5 can be better adaptively adjusted, thereby relatively fixing the first connecting mechanism 421 and the first guide rod 41a more stably.

[0110] In the present disclosure, Figure 2D A first embodiment of the first connecting mechanism 421 involved in the examples of the present disclosure is also shown. The first embodiment of the first connecting mechanism 421 is described below.

[0111] In some examples, the first connecting mechanism 421 can include a channel. The floating member 5 can be disposed in the channel.

[0112] In some examples, the number of channels can be two. In some examples, referring to Figure 2D , the first connecting mechanism 421 can include a first channel 4213 and a second channel 4214.

[0113] In some examples, the first channel 4213 can pass through the opening portion 4211. The second channel 4214 can pass through the opening portion 4211. In some examples, the first channel 4213 and the second channel 4214 can be arranged on two sides of the opening portion 4211. In some examples, the first channel 4213 and the second channel 4214 can be symmetrically arranged on two sides of the opening portion 4211. The floating member 5 can abut against the first guide rod 41a through the first channel 4213 and the second channel 4214. Thus, the abutting force exerted by the floating member 5 on the first guide rod 41a can be collinear, thereby facilitating the relative fixation of the first connecting mechanism 421 and the first guide rod 41a.

[0114] In some examples, the first channel 4213 and the second channel 4214 can be symmetrically arranged on two sides of the opening portion 4211 along a preset direction. In this case, the first channel 4213 and the second channel 4214 can facilitate the relative fixation of the first connecting mechanism 421 and the first guide rod 41a along the preset direction by being arranged on two sides of the opening along the preset direction.

[0115] In other examples, the number of channels can also be one, three or four. It can be understood that the number of channels can be selected according to the requirements of smoothness and linearity of the movement of the carriage 42. The more the number of channels, the more the freedom of the first guide rod 41a is limited, the higher the linearity of the movement of the carriage 42 is, but the difficulty of assembly or adjustment of the floating member 5 also rises, and the carriage 42 and the guide rod 41 are prone to be stuck.

[0116] Figure 3A is a schematic view showing an enlarged A region in Figure 2D . Figure 3B is a sectional view along the line X-X in Figure 3A . Figure 3C is a sectional view along the line Y-Y in Figure 3A . For a clearer illustration, the sectional lines of the components and structures in the floating member 5 are omitted in Figure 3B and Figure 3C .

[0117] In some examples, the floating member 5 can 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 be relatively rollable with the first guide rod 41a. In some examples, the floating member 5 can include a second rolling column 51b (see Figure 3A). The 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, by the first rolling column 51a and the second rolling column 51b abutting against and rolling relative to the first guide rod 41a, rolling friction can be formed, thereby reducing the friction between the floating member 5 and the first guide rod 41a.

[0118] In some examples, referring to Figure 3B , the first rolling column 51a and the second rolling column 51b can be at least partially located in the opening portion 4211. In this way, the first rolling column 51a and the second rolling column 51b can be facilitated to abut against the first guide rod 41a.

[0119] In some examples, referring to Figure 3A , the floating member 5 can include a first locking member 52a. The first locking member 52a can be configured to apply an action to the first rolling column 51a. The floating member 5 can also include a second locking member 52b. The second locking member 52b can be configured to apply an action to the second rolling column 51b. In this way, the first rolling column 51a and the second rolling column 51b can be facilitated to maintain abutment with the first guide rod 41a.

[0120] In some examples, referring to Figure 3B , the first locking member 52a can be configured to apply an action to the first rolling column 51a in a preset direction. The second locking member 52b can be configured to apply an action to the second rolling column 51b in the preset direction. In this way, the first rolling column 51a and the second rolling column 51b can be facilitated to abut against the first guide rod 41a in the preset direction.

[0121] In some examples, the first locking member 52a and the second locking member 52b can be thumbscrews.

[0122] In some examples, referring to Figure 3B , the first locking member 52a and the first rolling column 51a can be arranged in the first connecting mechanism 421 in a manner of being embedded in the first connecting mechanism 421. In this way, the first locking member 52a and the first rolling column 51a can be more stably fixed.

[0123] In some examples, referring to Figure 3B , the second locking member 52b and the second rolling column 51b can be arranged in the first connecting mechanism 421 in a manner of being embedded in the first connecting mechanism 421. In this way, the second locking member 52b and the second rolling column 51b can be more stably fixed.

[0124] In some examples, referring to Figure 3AThe floating member 5 can include a first support seat 53a. The first support seat 53a can be disposed between the first locking member 52a and the first rolling column 51a. Thus, the first rolling column 51a can be supported.

[0125] In some examples, referring to Figure 3C The first support seat 53a can have an arc-shaped groove 54 (hereinafter referred to as a first arc-shaped groove 54a). The first arc-shaped groove 54a can abut against the first rolling column 51a. In some examples, the first arc-shaped groove 54a can match the outer contour of the first rolling column 51a. The matching can mean that the first arc-shaped groove 54a is the same as the outer contour of the first rolling column 51a. Thus, the first rolling column 51a can be better supported to rotate in the first arc-shaped groove 54a, and the first rolling column 51a can be inhibited from sliding or wobbling in the first arc-shaped groove 54a.

[0126] In some examples, referring to Figure 3A The floating member 5 can include a second support seat 53b. The second support seat 53b can be disposed between the second locking member 52b and the second rolling column 51b. Thus, the second rolling column 51b can be supported.

[0127] In some examples, referring to Figure 3C The second support seat 53b can have an arc-shaped groove 54 (hereinafter referred to as a second arc-shaped groove 54b). The second arc-shaped groove 54b can abut against the second rolling column 51b. In some examples, the second arc-shaped groove 54b can match the outer contour of the second rolling column 51b. The matching can mean that the second arc-shaped groove 54b is the same as the outer contour of the second rolling column 51b. Thus, the second rolling column 51b can be better supported to rotate in the second arc-shaped groove 54b, and the second rolling column 51b can be inhibited from sliding or wobbling in the second arc-shaped groove 54b.

[0128] In some examples, the material of the first support seat 53a and the second support seat 53b can include at least one of copper, cast iron, lead, and tin. In this case, since such materials are easy to generate powder during friction, the frictional resistance between the first rolling column 51a and the first support seat 53a, and between the second rolling column 51b and the second support seat 53b can be reduced.

[0129] In some examples, referring to Figure 3BIn some examples, the floating member 5 can include elastic members 55 (e.g., first and second elastic members 55a and 55b described later). In this case, since the position of the rigid floating member 5 is generally difficult to adjust and the position accuracy of the rigid floating member 5 is also relatively high, the elastic members 55 can provide a certain buffer space for the position adjustment of the floating member 5 by elastic deformation, so that the elastic members 55 can effectively reduce the adjustment difficulty of the position of the floating member 5 compared with the rigid floating member 5. In addition, the elastic members 55 can also make adaptive compensation during use, for example, when some unexpected situations occur (e.g., problems such as interference caused by deformation of the first guide rod 41a or gap caused by wear of the contact position), the elastic members 55 can also actively adapt by elastic deformation, so as to maintain the abutting force between the floating member 5 and the first guide rod 41a within the expected range, reduce the risk of exponential increase of the abutting force caused by the slight interference of the first guide rod 41a design, deformation, etc., and also reduce the risk of abutting too loose with the first guide rod 41a due to the gap caused by wear.

[0130] In some examples, the elastic members 55 can be elastic balls. In this way, the elastic members 55 can be deformed in any direction. In other examples, the elastic members 55 can also be springs.

[0131] In some examples, the number of elastic members 55 can be one. In this way, the structure of the floating member 5 can be simplified.

[0132] In some examples, referring to Figure 3C , the floating member 5 (e.g., the elastic members 55) can include first elastic members 55a. The first elastic members 55a can be arranged between the first guide rod 41a and the first locking member 52a. In this case, by controlling the elastic deformation of the first elastic members 55a, the force applied by the first locking member 52a to the first guide rod 41a can be controlled within the expected range.

[0133] Figure 3D is a schematic view showing the first and second elastic members 55a and 55b involved in the examples of the present disclosure. In order to show more clearly, the section lines of the components and structures in the floating member 5 are omitted in Figure 3D .

[0134] In some examples, the number of elastic members 55 can also be multiple. For example, the number of elastic members 55 can be two, three, four or five. Referring to Figure 3D , Figure 3D shows an example in which the floating member 5 includes two elastic members 55.

[0135] In some examples, referring to Figure 3DThe floating member 5 can further include a second elastic member 55b. The second elastic member 55b can 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 controlled within a desired range.

[0136] In some examples, the first elastic member 55a and the second elastic member 55b can be arranged on both sides of the first guide rod 41a in a predetermined direction. In this way, the floating member 5 can have the ability to adapt to the deformation of the first guide rod 41a to both sides.

[0137] In other examples, the floating member 5 can also only include the second elastic member 55b.

[0138] In some examples, referring to Figure 3B The first channel 4213 can include a first through hole 42131. The first locking member 52a can be coupled with the first through hole 42131. In some examples, the coupling between the first locking member 52a and the first through hole 42131 can be a threaded coupling. In this way, the first locking member 52a can be conveniently fixed and adjusted.

[0139] In some examples, referring to Figure 3B The first channel 4213 can include a first recess 42132. The first recess 42132 can be configured to accommodate the first rolling column 51a. In some examples, the first recess 42132 can be in communication with the first through hole 42131. In this way, the first locking member 52a can conveniently exert force on the first rolling column 51a.

[0140] In some examples, referring to Figure 3B The second channel 4214 can include a second through hole 42141. The second locking member 52b can be coupled with the second through hole 42141. In some examples, the coupling between the second locking member 52b and the second through hole 42141 can be a threaded coupling. In this way, the second locking member 52b can be conveniently fixed and adjusted.

[0141] In some examples, referring to Figure 3B The second channel 4214 can include a second recess 42142. The second recess 42142 can be configured to accommodate the second rolling column 51b. In some examples, the second recess 42142 can be in communication with the second through hole 42141. In this way, the second locking member 52b can conveniently exert force on the second rolling column 51b.

[0142] In some examples, the first connecting mechanism 421 can further include a first cover plate 4215 (see Figure 3A). The first cover plate 4215 can be configured to close the gap of the opening portion 4211. Thereby, the possibility of components (e.g., the first rolling column 51a and the second rolling column 51b) falling out of the opening portion 4211 can be reduced.

[0143] 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 ). Thereby, the possibility of components (e.g., the first rolling column 51a and the second rolling column 51b) falling out of the first channel 4213 and the second channel 4214 can be reduced.

[0144] The following describes a second embodiment of the first connecting mechanism 421 involved in the examples of the present disclosure. Figure 3E is a structural schematic diagram illustrating the second embodiment of the first connecting mechanism 421 involved in the examples of the present disclosure. It should be noted that the following only describes the differences between the second embodiment and the first embodiment of the first connecting mechanism 421 in detail, and the same structures or parts can refer to the description of the first embodiment of the first connecting mechanism 421, which will not be described again.

[0145] In the second embodiment of the first connecting mechanism 421, the first connecting mechanism 421 can not include the first channel 4213 and the second channel 4214. The floating member 5 can 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 arc-shaped slot 54, and the elastic member 55.

[0146] As described above, the opening portion 4211 can be configured to cover the first guide rod 41a, and the floating member 5 can float to adapt to the position of the first guide rod 41a in the opening portion 4211. In some examples, referring to Figure 3E , the floating member 5 can be arranged in the opening portion 4211. In some examples, the floating member 5 can include a sliding connecting member. Let the sliding connecting member of the floating member 5 be a first sliding connecting member 56. The first sliding connecting member 56 can cover the first guide rod 41a. Thereby, the movement of the carriage 42 can be facilitated. In some examples, the first sliding connecting member 56 can be a ball bearing.

[0147] In some examples, the floating member 5 can include an elastic anti-backlash member. In some examples, the elastic anti-backlash member can be equivalent to the elastic member 55 in the first embodiment of the first connecting mechanism 421. In some examples, the elastic anti-backlash member can have the same function as the elastic member 55 in the first embodiment of the first connecting mechanism 421.

[0148] In some examples, an elastic gap eliminator can be arranged between the first sliding connector 56 and the opening portion 4211. In this case, the gap between the first sliding connector 56 and the opening portion 4211 can be eliminated by the elastic gap eliminator, the shaking of the sliding carriage 42 relative to the guide rod 41 can be inhibited, and the linearity of the movement of the sliding carriage 42 and the consistency of the optical axis can be improved. In the present embodiment, the radial dimension of the opening portion 4211 is greater than the radial dimension of the first sliding connector 56, so that a certain fault tolerance space can be provided for the positioning of the first guide rod 41a, which helps to avoid the direct contact of the first sliding connector 56 with the sliding carriage 42, reduces the risk of interference fit between the first sliding connector 56 and the sliding carriage 42, and thus reduces the accuracy requirement for the machining position of the first positioning hole 221.

[0149] In some examples, referring to Figure 3E , the opening portion 4211 can have a ring structure. Specifically, the sliding carriage 42 can have a first connecting mechanism 421. The first connecting mechanism 421 can be a protrusion formed on the side wall of the sliding carriage 42, and the edge of the protrusion away from the center of the sliding carriage 42 can be provided with an opening to form a ring structure and take the ring structure as the opening portion 4211. In some examples, the ring structure can have a notch. The notch on the ring structure is a third notch 4212. In this way, the first sliding connector 56 can be easily assembled into the opening portion 4211.

[0150] In some examples, the sliding carriage 42 can also rigidly abut the guide rod 41. In some examples, the zoom device 10 can include a second guide rod 41b (see Figure 2D or Figure 3E ). The second guide rod 41b can rigidly abut the sliding carriage 42. That is, the guide rod 41 rigidly connected with the sliding carriage 42 is the second guide rod 41b. In this way, the second guide rod 41b can support the sliding carriage 42.

[0151] In some examples, referring to Figure 2D or Figure 3E , the first guide rod 41a and the second guide rod 41b can be parallel. In this way, the possibility of the sliding carriage 42 being stuck can be reduced.

[0152] In some examples, referring to Figure 2D or Figure 3E , the connecting structure 4 can include a sliding connector. The sliding connector of the connecting structure 4 is a second sliding connector 44. In some examples, the second sliding connector 44 can connect the sliding carriage 42 and the second guide rod 41b. In this way, the sliding carriage 42 can move along the second guide rod 41b. In some examples, the second sliding connector 44 can be a ball bearing or a linear bearing.

[0153] In some examples, referring to Figure 2DThe sliding carriage 42 can include a guide block 422. The guide block 422 can be sleeved on the second guide rod 41b. That is, the sliding carriage 42 can be sleeved on the second guide rod 41b through the guide block 422. In some examples, the guide block 422 can have a guide hole 4221. The second sliding connector 44 can be arranged in the guide hole 4221. For example, the sidewall of the guide block 422 is formed with an opening for arranging a top screw to fix the second sliding connector 44 in the guide hole 4221. Thus, after the sliding carriage 42 is sleeved on the second guide rod 41b, the friction between the guide block 422 and the guide rod 41 can be reduced, thereby improving the smoothness of the movement of the movable lens group 11.

[0154] In some examples, the guide block 422 can have a long cylindrical shape. The guide block 422 can be arranged on the sidewall of the annular bearing structure of the sliding carriage 42. In some examples, the axial length of the guide block 422 can be greater than the radial length. In this case, by arranging the guide block 422 with a large length-diameter ratio, the smoothness of the movement of the sliding carriage 42 can be effectively improved. It can be understood that the longer the length of the guide block 422 and the smaller the inner diameter of the guide hole 4221 (or the second sliding connector 44), the higher the smoothness of the movement of the sliding 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 the longer the better, and the guide block 422 that is too long can easily cause the movable space of the sliding carriage 42 to be too small, thereby affecting the zooming effect.

[0155] In some examples, referring to Figure 2D or Figure 3E , if the sliding carriage 42 is sleeved on at least two guide rods 41, the sliding carriage 42 can simultaneously have the first connecting mechanism 421 and the guide block 422, and the first connecting mechanism 421 and the guide block 422 can be sleeved on one guide rod 41 respectively (for example, the first connecting mechanism 421 can be sleeved on the first guide rod 41a, and the guide block 422 can be sleeved on the second guide rod 41b). Among them, the guide block 422 can provide a reference for the positioning of the sliding carriage 42 through the cooperation with the guide rod 41 by the rigid structure, thereby improving the position accuracy and linearity of the sliding carriage 42 when moving. The first connecting mechanism 421 can better adapt to the position of the guide rod 41 through the floating connection, thereby reducing the risk of over-positioning, and thereby reducing the requirement for the machining accuracy of the position of the first positioning hole 221 for fixing the position of the guide rod 41.

[0156] It should be noted that the present disclosure does not excessively limit the relative position of the first connecting mechanism 421 and the guide block 422 in the sliding carriage 42, and the installation of the sliding carriage 42 can be facilitated. Of course, the present disclosure is not limited thereto.

[0157] Figure 4 is a schematic view showing that the guide block 422 involved in the examples of the present disclosure is arranged in a diagonal direction.

[0158] In some examples, referring to Figure 4 , the carriage 42 can also not have the first connecting mechanism 421. The carriage 42 can only be provided with the plurality of guide blocks 422, which can respectively cover the plurality of guide rods 41. In this way, the installation of the carriage 42 can be facilitated.

[0159] In some examples, referring to Figure 4 , different carriages 42 can respectively cover different guide rods 41. Of course, the present disclosure is not limited thereto, and different carriages 42 can also share one or more guide rods 41. For example, referring to Figure 2A , the number of guide rods 41 is three, two carriages 42 can respectively cover one second guide rod 41b, and the two carriages 42 can share the first guide rod 41a.

[0160] In the case where the number of carriages 42 is multiple, 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 can collide with another carriage 42, thereby causing the movement of the carriage 42 to be blocked. 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 gap for the movement of the guide block 422.

[0161] In some examples, referring to Figure 2C and Figure 4 , the side wall of the annular bearing structure of the carriage 42 can be formed with a fourth gap 423. The fourth gap 423 can be configured to pass through the other guide block 422 (for example, the guide block 422 of the adjacent other carriage 42). The size of the fourth gap 423 can be greater than the size of the guide block 422. In this way, the obstruction to the movement of the carriage 42 can be reduced. For example, the positions of the guide blocks 422 of two carriages 42 can be different, and after the installation of the two carriages 42, the positions of the two guide blocks 422 can be staggered with each other. The guide block 422 of the carriage 42 close to the front end can pass through the structure gap (i.e. the fourth gap 423) of the carriage 42 close to the rear end which is not provided with other structures.

[0162] Figure 4 Embodiments of four guide rods 41 are also shown. In some examples, referring to Figure 4 , the plurality of guide blocks 422 can be arranged on the carriage 42 in a diagonal direction. In this way, the twisting of the carriage 42 can be further inhibited.

[0163] Figure 5 is a schematic view showing the central symmetrical arrangement of two carriages 42 involved in the examples of the present disclosure. In Figure 5 , part of the structure is simplified for a clearer illustration, but should not be understood as a limitation of the present disclosure.

[0164] In some examples, referring to Figure 5 The guide blocks 422 of two adjacent carriages 42 can be arranged on different guide rods 41. In some examples, the extension directions of the guide blocks 422 of two adjacent carriages 42 can be opposite. That is, two adjacent carriages 42 can be arranged on the guide rods 41 in a central symmetric manner. In this way, the movement of the carriages 42 can be reduced.

[0165] In some examples, the number of guide blocks 422 of one carriage 42 can also be multiple. The multiple guide blocks 422 of one carriage 42 can be arranged on multiple guide rods 41. For example, each guide block 422 can be arranged on one guide rod 41. In this way, the twisting of the carriage 42 can be inhibited, thereby helping to improve the consistency of the optical axis and reducing the possibility of the carriage 42 being stuck with the guide rod 41.

[0166] In some examples, referring to Figure 2D or Figure 3E The connecting structure 4 can include a fixing member. The fixing member of the connecting structure 4 is a third fixing member 43c. The third fixing member 43c can fix the second sliding connecting member 44 to the carriage 42. In this way, the relative movement between the carriage 42 and the second sliding connecting member 44 can be inhibited, and the control accuracy of the movement of the carriage 42 can be improved.

[0167] In some examples, a mounting hole configured as the third fixing member 43c can be arranged on the guide block 422. In this way, the third fixing member 43c can be facilitated to fix the second sliding connecting member 44 to the carriage 42. In some examples, the third fixing member 43c can be a jackscrew. In some examples, when the third fixing member 43c is a jackscrew, the mounting hole can be a threaded hole. Of course, the present disclosure is not limited thereto, and the second sliding connecting member 44 can also be clamped and fixed in the guide hole 4221 of the guide block 422.

[0168] In some examples, referring back to Figure 2A The zoom device 10 can include a driving structure 6. In some examples, the driving structure 6 can be configured to drive the movement of the lens module 1. In some examples, the driving structure 6 can be configured to drive the movement of the movable lens group 11.

[0169] In some examples, the driving structure 6 can include a driving part 61 (see Figure 2A ). In some examples, the driving part 61 can be configured to provide a driving force. In some examples, the driving part 61 can provide a driving force for the movable lens group 11 (or the carriage 42) to drive the movement of the movable lens group 11 (or the carriage 42).

[0170] In some examples, the number of driving portions 61 can be multiple. In some examples, the number of driving portions 61 can be equal to the number of carriages 42. In some examples, one driving portion 61 can drive one carriage 42. In this way, it is convenient to realize accurate zooming. In other examples, one driving portion 61 can also drive multiple carriages 42.

[0171] In some examples, the axial direction of the driving portion 61 can be parallel to the axial direction of the guide rod 41. In this way, the driving portion 61 can conveniently drive the movable lens group 11 to move along the axial direction of the guide rod 41.

[0172] In some examples, the driving structure 6 can 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 driving portion 61 to the movable lens group 11. Specifically, the transmission assembly 62 can move under the driving of the driving portion 61, thereby transmitting the driving force to the movable lens group 11.

[0173] In some examples, referring back to Figure 2D , the transmission assembly 62 can be connected with the carriage 42. In this way, the transmission assembly 62 can drive the carriage 42 to move under the action of the driving portion 61.

[0174] In some examples, the transmission assembly 62 can be movably connected with the carriage 42. In this case, when the driving portion 61 generates an undesirable movement and transmits it to the transmission assembly 62, the transmission assembly 62 can suppress the transmission of the undesirable movement to the carriage 42 by moving relative to the carriage 42, thereby reducing the impact of the undesirable movement on the carriage 42.

[0175] For example, when the driving portion 61 is a lead screw, the undesirable movement can refer to the deformation or whipping of the lead screw occurring during use. In this case, when the transmission assembly 62 is movably connected with the carriage 42, the connection form of the movable connection provides a certain space for the transmission assembly 62 to move relative to the carriage 42, which can effectively suppress the problem of the carriage 42 being stuck or generating a large noise during movement caused by the deformation or whipping of the lead screw acting on the carriage 42 via the transmission assembly 62.

[0176] In some examples, the transmission assembly 62 can be movably connected to the carriage 42 in a manner that can 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 the undesirable movement generated by the driving portion 61 is transmitted to the transmission assembly 62, the transmission assembly 62 can reduce the impact of the undesirable movement generated by the driving portion 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.

[0177] In some examples, the transmission assembly 62 can be fixedly connected with the slide carriage 42. For example, the side wall of the transmission assembly 62 can be provided with a protrusion, and the side wall of the annular bearing structure of the slide carriage 42 can be provided with a protrusion, and the two protrusions can be fixedly connected with each other by means of snap fit, screwing or glueing.

[0178] The transmission assembly 62 and the slide carriage 42 are movably connected in the following examples. Figure 6 FIG. 6 shows an exploded view of the slide carriage 42 and the transmission assembly 62 according to an example of the present disclosure.

[0179] In some examples, referring to FIG. 6, the transmission assembly 62 can include a first connecting member 621. The slide carriage 42 can include a second connecting member 424. The first connecting member 621 can be connected with the second connecting member 424. In this way, the transmission assembly 62 can be conveniently connected with the slide carriage 42. Figure 6 In some examples, one side of the first connecting member 621 can abut against the second connecting member 424. Specifically, the first connecting member 621 can be connected with the second connecting member 424 in such a way that the two members abut against each other in the axial direction of the guide rod 41. In this way, the drive portion 61 can drive the slide carriage 42 to move along the guide rod 41.

[0180] In some examples, referring to FIG. 6, the first connecting member 621 can have a connecting hole 6211. The second connecting member 424 can include a connecting column 4241. The connecting column 4241 can cooperate with the connecting hole 6211. In this case, the cooperation between the connecting hole 6211 and the connecting column 4241 can help maintain the connection between the first connecting member 621 and the second connecting member 424. That is, the risk of disconnection between the first connecting member 621 and the second connecting member 424 can be reduced. In some examples, the connecting hole 6211 can be sleeved on the connecting column 4241.

[0181] Figure 6 In some examples, the connecting column 4241 can be parallel to the guide rod 41. In other words, the connecting column 4241 can extend in the axial direction of the guide rod 41. In this way, the first connecting member 621 can be conveniently rotated and slid relative to the second connecting member 424 in a predetermined plane.

[0182] In some examples, the size of the connecting hole 6211 can match the size of the connecting column 4241. In this case, by reducing the gap between the connecting column 4241 and the connecting hole 6211, the connecting column 4241 can be inhibited from shaking greatly in the connecting hole 6211, noise can be reduced, and the possibility of damage to the connecting column 4241 can be reduced. The matching can mean that the size of the connecting hole 6211 is substantially the same as the size of the connecting column 4241, and of course, the size of the connecting hole 6211 can be greater than the size of the connecting column 4241 in some directions.

[0183] In some examples, the size of the connecting hole 6211 can match the size of the connecting column 4241. In this case, by reducing the gap between the connecting column 4241 and the connecting hole 6211, the connecting column 4241 can be inhibited from shaking greatly in the connecting hole 6211, noise can be reduced, and the possibility of damage to the connecting column 4241 can be reduced. The matching can mean that the size of the connecting hole 6211 is substantially the same as the size of the connecting column 4241, and of course, the size of the connecting hole 6211 can be greater than the size of the connecting column 4241 in some directions. ​

[0184] In some examples, referring to Figure 6 The waist-shaped hole can have a length greater than an outer diameter of the connecting post 4241. The waist-shaped hole can be configured to limit the first connecting member 621 from sliding in a width direction of the waist-shaped hole. For example, the diameter of the connecting post 4241 can be equal to or slightly smaller than the width of the waist-shaped hole. In this case, the width dimension of the waist-shaped hole can limit the movable space of the first connecting member 621 in the width direction, and help the first connecting member 621 to slide in the length direction. When the driving portion 61 generates an unexpected movement, the first connecting member 621 can rotate around the connecting post 4241 in a preset plane or slide in the length direction of the waist-shaped hole in the preset plane under the driving of the driving portion 61 relative to the second connecting member 424.

[0185] In other examples, the connecting hole 6211 can also be a circular hole. The diameter of the connecting hole 6211 can be slightly greater than the diameter of the connecting post 4241.

[0186] In some examples, the transmission assembly 62 can abut against the sliding carriage 42 in the axial direction of the guide rod 41. In this way, the control accuracy of the movement of the sliding carriage 42 in the axial direction of the guide rod 41 can be improved.

[0187] In some examples, referring to Figure 6 The second connecting member 424 can include a base plate 4242. In some examples, the base plate 4242 can be configured to abut against the transmission assembly 62. In this case, by the surface contact between the base plate 4242 and the transmission assembly 62, compared with point contact, the contact area can be increased, and the stability of the abutment can be improved.

[0188] In some examples, the first connecting member 621 can be plate-shaped. In this way, the abutment area with the base plate 4242 can be increased, so that the transmission assembly 62 can more stably abut against the sliding carriage 42.

[0189] In some examples, the connecting post 4241 can be formed on the base plate 4242 (see Figure 6 When the transmission assembly 62 abuts against the base plate 4242, the connecting hole 6211 can cooperate with the connecting post 4241.

[0190] In some examples, referring to Figure 6When the connecting hole 6211 cooperates with the connecting post 4241, the first connecting member 621 can be located in the connecting groove 4243. In this way, the possibility of the first connecting member 621 being separated from the second connecting member 424 can be further reduced, thereby helping to maintain the abutting state of the first connecting member 621 and the second connecting member 424.

[0191] In some examples, when the first connecting member 621 is located in the connecting groove 4243, the first connecting member 621 can abut the bottom surface of the connecting groove 4243. In this way, the first connecting member 621 and the second connecting member 424 can be conveniently positioned in the axial direction of the guide rod 41.

[0192] In some examples, the size of the connecting groove 4243 can be greater than the size of the portion of the first connecting member 621 in the connecting groove 4243. That is, there can be a gap between the first connecting member 621 disposed in the connecting groove 4243 and the side wall of the connecting groove 4243. In this way, the first connecting member 621 can be provided with a movable space, realizing the movable connection of the two. In some examples, the depth of the connecting groove 4243 can be greater than the thickness of the portion of the first connecting member 621 in the connecting groove 4243.

[0193] In some examples, referring to Figure 6 A first elastic element 45 can be disposed on the side of the first connecting member 621 away from the substrate 4242. The first elastic element 45 can be configured to exert a first action on the first connecting member 621 to make the transmission assembly 62 abut the substrate 4242. In this case, the first elastic element 45 can improve the stability of the abutment of the transmission assembly 62 and the substrate 4242 by exerting an action on the transmission assembly 62, and the two elastically connected parts have a degree of freedom of relative movement, which can buffer the unwanted movement of the transmission assembly 62 (for example, the transmission assembly 62 is impacted), thereby reducing the possibility of the transmission assembly 62 and the carriage 42 being stuck.

[0194] In some examples, a cover plate can be disposed on the side of the first connecting member 621 away from the substrate 4242. Let the cover plate disposed on the side of the first connecting member 621 away from the substrate 4242 be a second cover plate 46 (see 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 be kept in an energy storage state. In this case, the second cover plate 46 can help to keep the first elastic element 45 in an energy storage state, and can fix the position of the first elastic element 45.

[0195] In some examples, the first elastic element 45 can be arranged between the first connecting member 621 and the second cover plate 46. In this way, the first elastic element 45 can be compressed conveniently.

[0196] In some examples, the second cover plate 46 can be detachably fixed to the base plate 4242. In this way, the first elastic element 45 can be arranged conveniently.

[0197] In some examples, the second cover plate 46 can be fixed to the base plate 4242 by means of a screw. Specifically, the second cover plate 46 can have an opening, and the base plate 4242 can be formed with a screw hole corresponding to the opening, so that the second cover plate 46 can be fixed by means of a screw.

[0198] In some examples, the first elastic element 45 can be configured to exert a second action (i.e. an action force) on the transmission assembly 62 to make the transmission assembly 62 abut (or closely adhere to) the driving portion 61. In this case, the gap between the transmission assembly 62 and the driving portion 61 in the radial direction can be reduced, so as to reduce the possibility of the transmission assembly 62 shaking and improve the transmission accuracy of the transmission assembly 62.

[0199] In some examples, the first elastic element 45 can be configured to exert a third action (i.e. an action force) on the sliding carriage 42 to make the sliding carriage 42 abut (or closely adhere to) the guide rod 41. In this case, the gap between the sliding carriage 42 and the guide rod 41 in the radial direction can be reduced, so as to reduce the possibility of the sliding carriage 42 shaking and improve the positioning accuracy of the sliding carriage 42.

[0200] 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 form two action forces in opposite directions, which are exerted on the first connecting member 621 (i.e. the second action) and the second cover plate 46 (i.e. the third action) respectively. Since the second cover plate 46 is fixed to the base plate 4242, the action force exerted on the second cover plate 46 can be transmitted to the base plate 4242, i.e. to the sliding carriage 42.

[0201] In some examples, the first elastic element 45 can be sleeved on the connecting column 4241. In this way, the first elastic element 45 can exert an action on the first connecting member 621 and the second cover plate 46.

[0202] In some examples, the second cover plate 46 can have a functional hole. The functional hole on the second cover plate 46 is 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.

[0203] In some examples, referring to Figure 6 , the number of the third function holes 461 can be multiple. In this case, by fixing the first elastic element 45 to different third function holes 461, the second action and the third action can be adjusted (for example, the size and direction of the second action and the third action can be adjusted).

[0204] 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 function hole 461. In some examples, by fixing the torsion arm to different third function holes 461, the first elastic element 45 can be twisted to different degrees, thereby adjusting the second action and the third action.

[0205] In some examples, referring to Figure 6 , the first connecting piece 621 can be formed with a second boss 622 configured to abut against the torsion arm of the torsion spring. Of course, the present disclosure is not limited thereto, and the torsion arm of the torsion spring can also directly abut against the body structure of the transmission assembly 62.

[0206] In some examples, referring back to Figure 2A , the transmission assembly 62 can be coupled with the driving part 61. In this way, the transmission of driving force can be facilitated.

[0207] In some examples, the transmission assembly 62 can be threadedly coupled with the driving part 61. In this way, the control accuracy of the movement of the carriage 42 can be improved.

[0208] In some examples, the transmission assembly 62 can be made of a metal material. In some examples, a dust cover can be provided below the driving part 61. The cross section of the dust cover can be arc-shaped. In this case, since the transmission assembly 62 will generate powder during use, by isolating the powder through the dust cover, the influence of the powder on other components can be reduced.

[0209] In some examples, the driving part 61 can be a lead screw. The transmission assembly 62 can be a nut matched with the lead screw. In this case, by means of lead screw transmission, the transmission accuracy can be improved.

[0210] Figure 2DA first embodiment of the transmission assembly 62 is shown. In some examples, the driving part 61 can be a ball screw. The transmission assembly 62 can be provided with balls inside. In some examples, when the driving part 61 is a ball screw, the transmission assembly 62 can be a nut with balls. In this case, the gap between the transmission assembly 62 and the driving part 61 can be reduced by adjusting the size of the balls. In addition, the friction coefficient and noise between the transmission assembly 62 and the driving part 61 can be reduced, and the possibility of self-locking of the adjacent carriages 42 after a collision can be reduced. Specifically, the rolling friction between the nut, the balls and the screw is caused by the interference fit between the three, which causes a slight deformation of the rigid parts (i.e. elastic deformation in a microscopic sense), thereby reducing the gap between the transmission assembly 62 and the driving part 61.

[0211] Figure 7A is a structural schematic diagram showing a second embodiment of the transmission assembly 62 involved in the examples of the present disclosure. Figure 7B is a schematic diagram showing a second elastic element 624 involved in the examples of the present disclosure. In Figure 7A , the structure of the transmission assembly 62 is simplified for a clearer illustration, but should not be understood as a limitation of the present disclosure.

[0212] Figure 7A and Figure 7B A second embodiment of the transmission assembly 62 is shown. In some examples, the driving part 61 can also be a trapezoidal screw or other different types of screws other than ball screws. In some examples, the transmission assembly 62 can 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 with the carriage 42. In some examples, the first transmission element 623 can be threadedly coupled with the driving part 61. Thus, the driving part 61 can drive the carriage 42 through the first transmission element 623.

[0213] In some examples, the transmission assembly 62 can also include a second elastic element 624 (see Figure 7B ). In some examples, the second elastic element 624 can be kept in an energy storage state. In this case, the first transmission element 623 can be pressed against the driving part 61 in the axial direction under the action of the second elastic element 624, reducing the gap between the first transmission element 623 and the driving part 61, thereby improving the control accuracy.

[0214] In some examples, the energy storage state can refer to a state in which the second elastic element 624 can release energy externally. For example, it can refer to a state in which the second elastic element 624 is deformed to accumulate elastic potential energy. In some examples, one end of the second elastic element 624 can be in abutment with the first transmission element 623. The other end of the second elastic element 624 can be in abutment with the second transmission element 625 (to be described later) or the base 2. In this way, it can be convenient for the second elastic element 624 to remain in the energy storage state.

[0215] In some examples, referring to Figure 7B , the transmission assembly 62 can further include a second transmission element 625. The second transmission element 625 can be threadedly coupled with the driving portion 61. In some examples, the second elastic element 624 can be disposed between the first transmission element 623 and the second transmission element 625. That is, one end of the second elastic element 624 can be in abutment with the first transmission element 623, and the other end can be in abutment with the second transmission element 625. In this case, the second transmission element 625 is axially pressed against the driving portion 61 under the action of the second elastic element 624, which can reduce the axial gap between the second transmission element 625 and the driving portion 61, thereby improving the control accuracy.

[0216] In some examples, referring to Figure 7B , the first transmission element 623 and the second transmission element 625 can be separate bodies. In this case, since the directions of the actions of the second elastic element 624 on the first transmission element 623 and the second transmission element 625 are opposite, compared with the integrated structure, the relative movement of the first transmission element 623 and the second transmission element 625 can be facilitated by the separate design. In addition, it can be helpful to avoid the actions of the second elastic element 624 on the first transmission element 623 and the second transmission element 625 canceling each other out. If the first transmission element 623 and the second transmission element 625 are integrated, it will result in the two actions of the second elastic element 624 canceling each other out, thereby making it difficult to eliminate the gap between the first transmission element 623, the second transmission element 625, and the driving portion 61.

[0217] In some examples, the second transmission element 625 can remain relatively stationary with the first transmission element 623. In this case, the distance between the first transmission element 623 and the second transmission element 625 is constant, that is, the magnitude of the action of the second elastic element 624 is constant, which can help the first transmission element 623 and the second transmission element 625 to remain axially pressed against the driving portion 61.

[0218] In some examples, referring to 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.

[0219] 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.

[0220] 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.

[0221] In some examples, the drive unit 61 can be fixed to the base 2 (see reference below). 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.

[0222] 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.

[0223] 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.

[0224] Figure 8A This is a schematic diagram illustrating the structure of the driving structure 6 involved in the example of this disclosure. Figure 8B This is a schematic diagram illustrating the first bearing 63a involved in the example of this disclosure. Figure 8C This is a schematic diagram illustrating the second bearing 63b involved in the example of this disclosure. Figure 8A For clarity, the drive structure 6 has been simplified, but this should not be construed as a limitation of this disclosure.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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 positioning hole of the drive unit (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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] 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.

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] In some examples, the retaining nut 67 may be threadedly coupled to the second threaded portion 613.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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).

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] In some examples, the second sensor 72 can be a position sensor.

[0259] 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 makes it easy to sense that the carriage 42 is in the zero position.

[0260] In other examples, the second sensor 72 may also be located at both the front and rear ends of the base 2.

[0261] In some examples, the second sensor 72 can be a non-contact sensor. This reduces the impact on the movement of the carriage 42.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] In this disclosure, when an unwanted movement generated by the drive unit 61 is transmitted to the transmission assembly 62, the transmission assembly 62 moves relative to the carriage 42 along a preset plane, thereby reducing the impact of the unwanted movement generated by the drive unit 61 on the carriage 42 and improving the optical axis consistency of the lens module 1. Furthermore, the engagement of the connecting hole 6211 with the connecting post 4241 helps maintain the connection between the first connector 621 and the second connector 424, thus reducing the risk of the first connector 621 and the second connector 424 disengaging. This improves the control accuracy of the zoom device 10.

[0266] In summary, according to this disclosure, a zoom device 10 for an optical measuring instrument 100 can be provided to improve control accuracy.

[0267] While the present disclosure has been specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the foregoing description does not limit the present disclosure in any way. Those skilled in the art can make modifications and variations to the present disclosure as needed without departing from its essential spirit and scope, and all such modifications and variations shall fall within the scope of the present disclosure.

Claims

1. A zoom module for an optical measuring instrument, comprising a base and a lens module configured for adjusting the focal length, the lens module comprising a fixed lens group fixed to the base and a movable lens group movable relative to the base, characterized in that, The zoom module further includes a connecting structure configured to assemble the movable lens group onto the base, and a driving structure for driving the movable lens group to move. The connecting structure includes a guide rod fixed to the base and a slide sleeved on the guide rod and configured to assemble the movable lens group. The drive structure includes a drive unit and a transmission assembly coupled to the drive unit. The transmission component is movably connected to the carriage in a manner that allows it to move along a preset plane, the preset plane being orthogonal to the axial direction of the guide rod.

2. The zoom module for optical measuring instruments according to claim 1, characterized in that, The transmission assembly abuts against the carriage along the axial direction of the guide rod.

3. The zoom module for optical measuring instruments according to claim 1, characterized in that, The transmission assembly includes a first connector, and the carriage includes a second connector. The first connector has a connecting hole, and the second connector includes a connecting post that mates with the connecting hole and extends along the axial direction of the guide rod.

4. The zoom module for optical measuring instruments according to claim 3, characterized in that, The size of the connecting hole matches the size of the connecting post.

5. The zoom module for optical measuring instruments according to claim 4, characterized in that, The connecting hole is an oblong hole, the length of which is greater than the outer diameter of the connecting post, and the width of which is the same as the outer diameter of the connecting post; or the connecting hole is a circular hole, the diameter of which is slightly larger than the diameter of the connecting post.

6. The zoom module for optical measuring instruments according to claim 3, characterized in that, The second connector includes a base plate configured to abut against the transmission assembly, a cover plate having the connecting post formed thereon is provided on the side of the first connector away from the base plate, and a first elastic element is provided between the base plate and the cover plate, the first elastic element being kept in an energy-storing state and configured to apply a first action to the first connector.

7. The zoom module for optical measuring instruments according to claim 6, characterized in that, The first connector is plate-shaped and abuts against the substrate.

8. The zoom module for optical measuring instruments according to claim 6, characterized in that, The cover plate is detachably fixed to the base plate, and the first elastic element is further configured to apply a second action and a third action to the first connector and the second connector, respectively, so that the transmission assembly abuts against the drive portion and the carriage abuts against the guide rod.

9. The zoom module for optical measuring instruments according to claim 8, characterized in that, The first elastic element is a torsion spring, and the first elastic element is sleeved on the connecting post.

10. The zoom module for an optical measuring instrument according to claim 9, characterized in that, The two torsion arms of the torsion spring are respectively fixed to the first connector and the cover plate, and the first connector has a boss configured for the torsion arms of the torsion spring to abut against.

Images