A floating lens

Abstract

The application discloses a floating lens and relates to the field of optical lenses. The floating lens comprises a box body, a lens frame movably arranged in the box body and a driving assembly, wherein the lens frame is fixedly installed with at least one lens. The floating lens further comprises an elastic clamping seat provided with a second slot and a first elastic sheet; the lens frame is provided with a first mounting slot and a first slot; the elastic clamping seat is fixed in the first mounting slot, and the second slot is aligned and communicated with the first slot at the end to form a plug-in slot. The driving assembly comprises a mounting frame, a stepping motor, a screw rod and a sliding block, wherein the sliding block is screwed on the screw rod and is provided with a plug-in connector; the mounting frame is fixed to the box body, the plug-in connector is inserted into the plug-in slot, and the first elastic sheet is elastically abutted against the side surface of the plug-in connector to form an interference fit, so that the plug-in connector is fastened in the plug-in slot. The sliding block and the lens frame are fastened and connected through plug-in and elastic sheet interference fit, transmission loosening is effectively prevented, focusing stability is improved, the structure is compact, and the lens is beneficial to miniaturization.

Description

Technical Field

[0001] This invention relates to the field of optical lenses, specifically a floating lens. Background Technology

[0002] In existing floating focus and zoom lenses, such as the Chinese utility model patent with publication number CN 217689579 U, a single-element floating focus fixed focus lens typically includes a lens frame movably disposed within a housing and a drive mechanism for driving the lens frame. The drive mechanism includes a stepper motor, a lead screw, and a U-shaped rack. The helical teeth of the U-shaped rack mesh with the lead screw, and the U-shaped rack is fixedly connected to the lens frame. However, this drive structure has the following problems: (1) The spacing between the teeth of the U-shaped rack is too large, resulting in poor meshing and easy for the U-shaped rack to fall off, which in turn affects the normal movement of the frame and ultimately interferes with the focusing and zooming functions of the lens.

[0003] (2) The U-shaped rack and its connection structure with the frame occupy a large space, which is not conducive to the miniaturization of the product; at the same time, the structure is complex and the assembly is difficult. Summary of the Invention

[0004] The purpose of this invention is to provide a floating lens that overcomes the aforementioned problems existing in the prior art.

[0005] To achieve the objective, the present invention provides the following technical solution: A floating lens includes a housing and a lens frame movably disposed within the housing, the lens frame having at least one lens fixedly mounted thereon, and a drive assembly for driving the lens frame to move on the housing; it also includes an elastic bracket; the elastic bracket has a second slot, and the inner sidewall of the second slot has a first spring piece; The frame is provided with a first mounting groove and a first slot; the elastic bracket is fixedly installed in the first mounting groove, and the second slot is aligned and connected to the end of the first slot to form a plug-in groove; The drive assembly includes a mounting bracket, a stepper motor, a lead screw, and a slider. The slider is screwed onto the lead screw through its internal threaded hole. Both ends of the lead screw are rotatably mounted on the connecting lugs of the mounting bracket, and one end is fixedly connected to the output shaft of the stepper motor. The slider is provided with a connector. The mounting bracket is fixedly installed on the housing, and the connector is inserted into and fitted into the connector slot. The first spring piece elastically abuts against the side of the connector, so that the connector and the connector slot form an interference fit, and the connector is fastened in the connector slot.

[0006] Furthermore, the connector is inserted into and fitted into the connector slot, specifically: the left and right sides of the connector abut against the left and right inner walls of the first slot, respectively.

[0007] Furthermore, the first spring contact elastically abuts against the side of the connector, so that the connector and the connector slot form an interference fit. Specifically, the first spring contact elastically abuts against the lower side of the connector, and the upper side of the connector abuts against the upper inner wall of the first slot, forming an interference fit.

[0008] Furthermore, the inner bottom surface of the second slot is provided with a second spring piece, which elastically abuts against the end face of the connector.

[0009] Furthermore, the elastic card holder is U-shaped and includes an upper plate, a side plate, and a lower plate that are fixedly connected in sequence; the lower plate is provided with the first spring piece, and the side plate is provided with the second spring piece.

[0010] Furthermore, the two ends of the first spring are fixedly connected to the lower plate, and the middle is curved inward into an arch shape. The upper end of the second spring is fixedly connected to the side plate, and the lower end is a free end extending inward.

[0011] Furthermore, the elastic card holder is a stamped metal part.

[0012] Furthermore, the left and right sides of the upper plate are fixedly connected to the glue dispensing groove of the first mounting groove by glue.

[0013] Furthermore, the slider is inserted into and fitted into the first slot, and the frame is provided with a first clearance groove for avoiding the connecting ear and a second clearance groove for avoiding the lead screw.

[0014] Furthermore, the mounting bracket is fixedly installed on the outer side wall of the housing, and the housing is provided with a third clearance groove for avoiding the drive assembly.

[0015] Furthermore, it also includes a cover, guide rods, an optocoupler switch, a sensor plate, and an FPC. The cover and the housing are interlocked and fixedly connected. Several guide rods are provided between the cover and the housing for moving the mirror frame. The mirror frame is fixedly equipped with the optocoupler switch for controlling the stepper motor, and the mirror frame is fixedly equipped with a sensor plate for triggering the optocoupler switch.

[0016] Optical coupler switches and stepper motors are connected to the back-end control system via FPC. When the sensor plate that moves with the lens frame passes the optical coupler switch, it feeds a signal back to the back-end control system, stopping the stepper motor and preventing the lens frame, lens and other components from colliding.

[0017] Compared with the prior art, the present invention has the following advantages: Firstly, by setting up an elastic bracket, which has a second slot and a first spring piece, and aligns and communicates with the end of the first slot of the lens frame to form a plug groove; the plug of the drive component is inserted and fitted into the plug groove, and the first spring piece elastically abuts against the side of the plug to form an interference fit. Compared with the problem of easy loosening and falling off when the U-shaped rack and screw meshes with the lead screw in the prior art, the slider of the present invention is threaded into the lead screw, effectively preventing loosening and falling off. At the same time, the present invention uses the interference fit of the plug and the spring piece to achieve a tight connection between the slider and the lens frame, effectively preventing loosening during the transmission process, and the structure is compact. The combination of the two significantly improves the transmission stability and reliability of the floating focusing lens, and the structural design is compact.

[0018] Secondly, a second spring is provided on the inner bottom surface of the second slot, which elastically abuts against the end face of the connector. This structure provides additional preload between the connector and the elastic retainer (radial of the lead screw), further eliminating assembly gaps, enhancing the vibration resistance of the connection, and preventing loosening of the fit due to machining tolerances.

[0019] Thirdly, by setting the elastic retainer to a U-shaped structure (including an upper plate, side plates, and a lower plate), where the first spring is fixed at both ends and arched in the middle, and the second spring is a cantilever structure with a fixed upper end and a free lower end, the elastic retainer structure becomes compact and easy to manufacture. Furthermore, the arched spring provides more stable elastic force, acting as a support, while the cantilevered second spring provides greater elastic deformation. Together, they achieve multi-directional elastic restraint of the connector, optimizing mechanical performance within a limited space.

[0020] Fourth, by setting a first clearance groove to avoid the connecting ear, a second clearance groove to avoid the lead screw, and a third clearance groove on the housing to avoid the drive assembly, these clearance structures allow components such as the lead screw, slider, and connecting ear to be compactly arranged between the lens frame and the housing, avoiding motion interference, while significantly reducing the space occupied by the lens in the axial and radial directions, further enabling product miniaturization. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0023] Figure 3 This is a disassembly diagram of the present invention. Figure 1 .

[0024] Figure 4 This is a disassembly diagram of the present invention. Figure 2 .

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention in its inverted state.

[0026] Figure 6 This is a disassembly diagram of the present invention in its inverted state.

[0027] Figure 7 This is a three-dimensional schematic diagram of the elastic card holder in this invention.

[0028] Figure 8 for Figure 3 A magnified view of part A in the diagram. Detailed Implementation

[0029] Specific embodiments of the present invention will now be described with reference to the accompanying drawings. Many details are described below to provide a comprehensive understanding of the invention; however, those skilled in the art will be able to implement the invention without these details.

[0030] like Figures 1 to 8 As shown, a floating lens includes a case cover 1, a case body 6, and a lens frame 4. The case cover 1 and the case body 6 are interlocked and fixedly connected. The lens frame 4 is movably disposed inside the case body 6, and a drive assembly for moving the lens frame 4 is mounted on the case body 6. At least one lens 3 is fixedly mounted on the lens frame 4, which is a common configuration and will not be described in detail here. More specifically, several guide rods 5 are provided between the case cover 1 and the case body 6 for movable positioning, and the lens frame 4 is movably disposed within the case cover 1 via these guide rods 5. Of course, the lens frame 4 can also employ other linear sliding mechanisms.

[0031] The innovation of this invention lies mainly in the driving component and its connection structure with the frame 4, as detailed below: like Figures 1 to 8 As shown, the present invention also includes an elastic card holder 2, which includes, but is not limited to, a stamped metal part.

[0032] like Figures 1 to 8 As shown, the elastic bracket 2 is provided with a second slot 20, and the inner sidewall of the second slot 20 is provided with a first spring piece 231. The frame 4 is provided with a first mounting groove 401 and a first slot 403. The elastic bracket 2 is fixedly installed in the first mounting groove 401, and the ends of the second slot 20 and the first slot 403 are aligned and connected to form a plug-in groove.

[0033] Preferably, the inner bottom surface of the second slot 20 is provided with a second spring 221. The second spring 221 elastically abuts against the end face of the connector 841.

[0034] like Figures 1 to 8As shown, in one specific embodiment, the elastic card holder 2 includes a U-shaped structure comprising an upper plate 21, a side plate 22, and a lower plate 23 that are fixedly connected in sequence. The lower plate 23 is provided with a first spring piece 231, and the side plate 22 is provided with a second spring piece 221.

[0035] Preferably, the first spring piece 231 is fixedly connected to the lower plate 23 at both ends, and curved inward in an arch shape in the middle, so that the first spring piece 231 can provide stable elastic force and support, and stably support the connector 841. The second spring piece 221 is a cantilever structure, with its upper end fixedly connected to the side plate 22 and its lower end being a free end extending inward. The cantilever structure of the second spring piece 221 can provide better elastic deformation.

[0036] Preferably, the upper plate 21, the side plate 22, the lower plate 23, the first spring 231, and the second spring 221 are stamped metal parts, which may include, but are not limited to, iron products.

[0037] Preferably, the left and right sides of the upper plate 21 are fixedly connected to the glue dispensing groove 400 of the first mounting groove 401 by glue, thereby fixing the elastic card holder 2 in the first mounting groove 401.

[0038] like Figures 1 to 8 As shown, the drive assembly includes a mounting bracket 80, a stepper motor 82, a lead screw 83, and a slider 84. The slider 84 is screwed onto the lead screw 83 through its internal threaded hole. Both ends of the lead screw 83 are rotatably mounted on connecting lugs 801 of the mounting bracket 80, and one end is fixedly connected to the output shaft of the stepper motor 82. In addition, the slider 84 is provided with a connector 841.

[0039] Preferably, the slider 84 and the connector 841 are integrally formed.

[0040] like Figures 1 to 8 As shown, the mounting bracket 80 is fixedly installed on the housing 6, including but not limited to being fixedly installed on the outer side wall of the housing 6 by screws, and the housing 6 is provided with a third clearance groove 61 for avoiding the aforementioned drive components.

[0041] like Figures 1 to 8 As shown, when the mounting bracket 80 is fixedly installed on the housing 6, the plug 841 is inserted into and fitted into the plug groove, and the first spring piece 231 elastically abuts against the side of the plug 841, so that the plug 841 and the plug groove form an interference fit, thereby fastening the plug 841 in the plug groove.

[0042] like Figures 1 to 8As shown, preferably, the connector 841 is inserted into and fitted into the connector slot. Specifically, the left and right sides of the connector 841 abut against the left and right inner walls of the first slot 403, respectively, so that the connector 841 and the frame 4 are fixed together in the circumferential direction of the lead screw 83. The first spring piece 231 elastically abuts against the side of the connector 841, so that the connector 841 and the connector slot form an interference fit. Specifically, the first spring piece 231 elastically abuts against the lower side of the connector 841, so that the upper side of the connector 841 abuts against the upper inner wall of the first slot 403, forming an interference fit, so that the connector 841 and the frame 4 are fixed together in the axial direction of the lead screw 83, and the interference fit is used to tighten the assembly connection between the two to prevent accidental loosening.

[0043] Preferably, the second spring 221 elastically abuts against the end face of the plug 841, and the plug 841 and the elastic retainer 2 support each other radially on the lead screw 83.

[0044] Of course, it is not excluded that in other specific embodiments, the left and right sides of the connector 841 may be further press-fitted with the left and right inner walls of the first slot 403, respectively, while abutting against each other; it is not excluded that in other specific embodiments, the upper side of the connector 841 may also abut against the inner wall of the upper plate 21.

[0045] In other specific embodiments, it is not excluded that the connector 841 is inserted into and fitted into the insertion slot. Alternatively, the upper and lower sides of the connector 841 may abut against the upper and lower inner walls of the first slot 403, respectively, thus fixing the connector 841 and the frame 4 axially along the lead screw 83. The first spring piece 231 elastically abuts against the side of the connector 841, forming an interference fit between the connector 841 and the insertion slot. Alternatively, the first spring piece 231 elastically abuts against the right side of the connector 841, and the left side of the connector 841 abuts against the right inner wall of the first slot 403, forming an interference fit. At this time, the elastic retainer 2 is U-shaped, including a left plate (equivalent to the upper plate 21), a side plate (equivalent to the side plate 22), and a right plate (equivalent to the lower plate 23) that are fixedly connected in sequence.

[0046] like Figures 1 to 8 As shown, preferably, the slider 84 is inserted into and fitted into the first slot 403, and the frame 4 is provided with a first clearance groove 402 for avoiding the connecting ear 801, and a second clearance groove 4031 for avoiding the lead screw 83. This not only makes the connection between the slider 84 and the frame 4 more secure, but also makes the overall assembly structure more compact.

[0047] like Figures 1 to 8As shown, the present invention also includes an optocoupler switch 7, a sensing element 9, and an FPC 81. The lens frame 4 is fixedly mounted with the optocoupler switch 7 for controlling the stepper motor 82, and the lens frame 4 is also fixedly mounted with the sensing element 9 for triggering the optocoupler switch 7. Specifically, the optocoupler switch 7 and the stepper motor 82 are connected to the back-end control system (not shown in the figure) via the FPC 81. When the sensing element 9, which moves with the lens frame 4, passes the optocoupler switch 7, the optocoupler switch 7 is triggered and sends a signal back to the back-end control system, stopping the stepper motor 82 and preventing the lens frame 4, lens 3, and other components from colliding.

[0048] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A floating lens, comprising a housing (6) and a lens frame (4) movably disposed within the housing (6), wherein at least one lens (3) is fixedly mounted on the lens frame (4), and the housing (6) is provided with a driving assembly for driving the lens frame (4) to move, characterized in that: It also includes a flexible card holder (2); the flexible card holder (2) is provided with a second slot (20), and the inner sidewall of the second slot (20) is provided with a first spring piece (231); The frame (4) is provided with a first mounting groove (401) and a first slot (403); the elastic bracket (2) is fixedly installed in the first mounting groove (401), and the second slot (20) is aligned and connected with the end of the first slot (403) to form a plug-in groove; The drive assembly includes a mounting bracket (80), a stepper motor (82), a lead screw (83), and a slider (84). The slider (84) is screwed onto the lead screw (83) through its internal threaded hole. Both ends of the lead screw (83) are rotatably mounted on the connecting lugs (801) of the mounting bracket (80), and one end is fixedly connected to the output shaft of the stepper motor (82). The slider (84) is provided with a connector (841). The mounting bracket (80) is fixedly installed on the housing (6), and the plug (841) is inserted into and fitted into the plug slot, and the first spring piece (231) elastically abuts against the side of the plug (841), so that the plug (841) and the plug slot form an interference fit, and the plug (841) is fastened in the plug slot.

2. A floating lens according to claim 1, characterized in that: The connector (841) is inserted into and fitted into the connector slot, specifically: the left and right sides of the connector (841) abut against the left and right inner walls of the first slot (403), respectively.

3. A floating lens according to claim 2, characterized in that: The first spring (231) elastically abuts against the side of the plug (841), so that the plug (841) and the plug slot form an interference fit. Specifically, the first spring (231) elastically abuts against the lower side of the plug (841), and the upper side of the plug (841) abuts against the upper inner wall of the first slot (403), forming an interference fit.

4. A floating lens according to claim 3, characterized in that: The inner bottom surface of the second slot (20) is provided with a second spring (221), which elastically abuts against the end face of the connector (841).

5. A floating lens according to claim 4, characterized in that: The elastic card holder (2) is U-shaped and includes an upper plate (21), a side plate (22) and a lower plate (23) that are fixedly connected in sequence; the lower plate (23) is provided with the first spring piece (231) and the side plate (22) is provided with the second spring piece (221).

6. A floating lens according to claim 5, characterized in that: The first spring piece (231) is fixedly connected to the lower plate (23) at both ends, and is curved inward in an arch shape in the middle. The upper end of the second spring piece (221) is fixedly connected to the side plate (22), and the lower end is a free end extending inward.

7. A floating lens according to claim 1, 5 or 6, characterized in that: The elastic card holder (2) is a stamped metal part.

8. A floating lens according to claim 5, characterized in that: The left and right sides of the upper plate (21) are fixedly connected to the glue dispensing groove (400) of the first mounting groove (401) by glue.

9. A floating lens according to claim 1, characterized in that: The slider (84) is inserted into and fitted into the first slot (403), and the frame (4) is provided with a first clearance groove (402) for avoiding the connecting ear (801) and a second clearance groove (4031) for avoiding the lead screw (83).

10. A floating lens according to claim 9, characterized in that: The mounting bracket (80) is fixedly installed on the outer side wall of the housing (6), and the housing (6) is provided with a third clearance groove (61) for avoiding the drive assembly.

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