Telescopic lens cone convenient to adjust

Abstract

The utility model relates to the technical field of observation mirrors, and particularly discloses a telescopic lens cone convenient to adjust. The telescopic lens barrel comprises a first lens barrel, a second lens barrel and a third lens barrel. An auxiliary connecting cylinder is arranged between the second lens cone and the third lens cone. The third lens barrel can adjust the distance from the first lens based on the second lens; all the lens cones are hollow, the first lens cone is provided with a first lens, the third lens cone is provided with a second lens, and a certain distance is reserved between the two lenses. A rack is arranged at the bottom of the third lens barrel, a telescopic groove and a gear groove are arranged at the bottom in the auxiliary connecting barrel, and a transmission gear meshed with the rack is arranged in the groove. And rotating wheels are arranged at two ends of the transmission shaft. During use, a user can rotate the first rotating wheel or the second rotating wheel while observing, so that the third lens cone can adjust the distance between the third lens cone and the first lens in the second lens cone, and a better imaging effect is obtained. Adjustment and observation can be carried out at the same time and are very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of photography, in particular to a telescopic lens barrel which is convenient to adjust. Background Art

[0002] In the field of photography, a telescopic lens barrel is a very crucial and commonly used device. Its main function is to meet the needs of photographers to flexibly adjust the distance and angle between the lens and the shooting object during the shooting process. The design of the telescopic lens barrel is very delicate. It usually consists of multiple telescopic lenses, and these lenses can slide relative to each other to change the total length of the lens. In this way, the photographer can easily change the distance between the camera lens and the shooting object, as well as the focal length of the lens according to the shooting needs, so as to obtain different shooting effects. The telescopic lens barrel is widely used in various photographic occasions, such as in film shooting, television production, news interviews, etc., and is a very important tool. Its use can not only improve the work efficiency of photographers, but also enhance the quality and richness of the shooting images.

[0003] It is very important for the telescopic lens barrel to be flexibly adjustable so that it can be freely telescoped according to the needs of the observer, making it more convenient and comfortable for the observer to observe objects. The design of this kind of telescopic lens barrel needs to consider the actual needs of the observer to improve the efficiency and quality of observation. Whether in scientific research, production manufacturing, or in daily life, this kind of conveniently adjustable telescopic lens barrel can play an important role and provide great convenience for the observer.

[0004] In the patent "A lens barrel for facilitating the stretching of a lens" (publication number: CN213302743U, hereinafter referred to as the prior art 1), a lens barrel that can adjust the focal length between lenses is disclosed. The prior art 1 includes components such as an outer lens barrel, a telescopic barrel, an objective lens barrel, and a pressing rod. By setting a sliding groove, the upper end of the objective lens barrel is fixedly connected with a sunshade mechanism near the middle position, a pressing rod and a pressing block are arranged on the outer surface near the right side of the upper end of the lens barrel, and the sunshade mechanism includes a sunshade plate. Three groups of brackets are evenly installed near the left side of the upper end of the sunshade plate, and a rotating shaft is connected between the three groups of brackets, realizing the stretching and retracting of the lens. In the prior art 1, the distance between the lens barrels is adjusted by pressing on the pressing block. Since the lens barrels are directly moved by hand, when the user uses the device, one hand needs to press the pressing block and the other hand needs to move, which is very inconvenient for the user. During the adjustment process, the vibration generated between the lenses is also relatively large, unstable, and the adjustment accuracy is not high. Summary of the Utility Model

[0005] In view of this, the embodiment of the utility model provides a telescopic lens barrel which is convenient to adjust, so as to solve the problem of large vibration and instability when adjusting the distance between lenses in the prior art.

[0006] In a first aspect, an embodiment of the present utility model provides a telescopable lens barrel that is convenient to adjust, including a first lens barrel, a second lens barrel, and a third lens barrel; both ends of the second lens barrel are respectively connected to the first lens barrel and the second lens barrel; an auxiliary connection barrel is provided at the connection between the second lens barrel and the third lens barrel; the first lens barrel, the second lens barrel, and the third lens barrel are all hollow; a rack is provided at the bottom of the outer body of the third lens barrel; a telescopic groove is provided at the bottom inside the auxiliary connection barrel; a through gear groove is provided in the middle of the telescopic groove; a transmission gear meshing with the rack is provided in the gear groove; the transmission gear is fixedly connected to a transmission shaft; a runner is provided on the transmission shaft; a limit cover is provided at the bottom of the transmission gear.

[0007] Preferably, the limit cover covers the part where the transmission gear meshes with the rack, and a through hole for the transmission shaft is provided on the limit cover.

[0008] Preferably, the limit cover is detachably arranged at the bottom of the telescopic groove.

[0009] Preferably, the runner includes a first runner and a second runner; the first runner and the second runner are respectively fixedly arranged at both ends of the transmission shaft.

[0010] Preferably, a first lens is provided at one end of the first lens barrel where it is connected to the second lens barrel; a second lens is provided at one end of the third lens barrel where it is connected to the second lens barrel; there is a spacing distance between the first lens and the second lens.

[0011] Preferably, the inner diameter of the first lens barrel is greater than that of the second lens barrel; the inner diameter of the second lens barrel is greater than that of the third lens barrel.

[0012] Preferably, the third lens barrel reduces or increases the distance between the second lens and the first lens through the relative movement of the transmission gear and the rack.

[0013] Preferably, an installation part is provided at one end of the third lens barrel away from the second lens; the third lens barrel is detachably provided with an observation component through the installation part.

[0014] Preferably, a hinge platform is provided at the bottom of the second lens barrel; a first hinge plate and a second hinge plate are respectively provided on both sides of the hinge platform.

[0015] Preferably, coaxial hinge holes are provided on the first hinge plate and the second hinge plate.

[0016] A telescopable lens barrel that is convenient to adjust provided by the present utility model has the following beneficial effects:

[0017] In the present utility model, an auxiliary connecting cylinder for connection is arranged between the second lens barrel and the third lens barrel, enabling the third lens barrel to move inside the second lens barrel based on the auxiliary connecting cylinder. Through the telescopic structure of the gear and the rack arranged, the control degree of the telescoping is higher, and it can be adjusted according to the scenario during the use by the user. And through the telescopic arrangement set between the second lens barrel and the third lens barrel, the user can rotate the knob while observing, so that the third lens barrel can adjust the distance from the first lens inside the second lens barrel. The adjustment and the observation can be carried out simultaneously, completing the real-time observation and the adjustment of the imaging effect, which is very convenient and fast in use. Through the transmission cooperation of the gear and the rack in the present utility model, the vibration generated during the adjustment between the third lens barrel and the second lens barrel is smaller compared with the prior art, and the stability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, and all of these are within the protection scope of the present utility model.

[0019] Figure 1 is a schematic structural diagram of a telescopic lens barrel that is convenient for adjustment;

[0020] Figure 2 is a schematic cross-sectional structural diagram of a telescopic lens barrel that is convenient for adjustment;

[0021] Figure 3 is a schematic structural diagram of the auxiliary connecting cylinder;

[0022] Parts and numbers in the figure:

[0023] 110 - first lens barrel, 111 - first lens, 120 - second lens barrel, 130 - third lens barrel, 131 - second lens, 132 - rack, 140 - auxiliary connecting cylinder, 141 - telescopic groove, 142 - gear groove, 143 - driving gear, 145 - first runner, 146 - second runner, 147 - limiting cover, 160 - hinged platform, 161 - first hinged plate, 162 - second hinged plate, 163 - hinged hole, 170 - mounting part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. Moreover, the terms "include", "comprise", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article, or device including the said elements. If there is no conflict, the embodiments of the present utility model and the various features in the embodiments may be combined with each other, and all are within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figure 1, an embodiment of the present utility model provides a telescopic lens barrel that is convenient to adjust. It has convenient adjustment performance, enabling users to easily perform fine-tuning and precise control. This telescopic lens barrel is particularly suitable for occasions that require precise observation and operation, such as microscopes, telescopes, and other various optical instruments. Its main feature is that the length of the lens barrel can be flexibly telescoped according to the user's needs, so as to obtain different working distances to adapt to various observation targets and environments. The telescopic lens barrel includes a first lens barrel 110, a second lens barrel 120, and a third lens barrel 130. Both ends of the second lens barrel 120 are respectively connected to the first lens barrel 110 and the second lens barrel 120. The telescopic lens barrel is a lens system composed of multiple lens barrels, including three main parts, namely the first lens barrel 110, the second lens barrel 120, and the third lens barrel 130. These three lens barrels cooperate together so that during the telescoping process of the lens, the focal length of the lens can be effectively adjusted to achieve the purpose of clearly imaging the photographed object. In the structure of the telescopic lens barrel, the second lens barrel 120 plays a role of connecting the front and the back. Its two ends are respectively tightly connected to the first lens barrel 110 and the third lens barrel 130, forming a complete lens telescoping system. Through the telescopic setting provided between the second lens barrel 120 and the third lens barrel 130, the user can observe while rotating the first rotating wheel 145 or the second rotating wheel 146, so that the third lens barrel 130 can adjust the distance from the first lens 111 inside the second lens barrel 120. During use, adjustment and observation can be carried out simultaneously, which is very convenient.

[0027] When the lens needs to be telescoped, the second lens barrel 120 can move flexibly between the first lens barrel 110 and the third lens barrel 130 to adjust the focal length between the lenses, so as to obtain an ideal imaging effect. Furthermore, the design of the telescopic lens barrel also fully considers the stability and durability of the lens. The connection between each lens barrel adopts a sealed structure, effectively preventing dust and moisture inside the lens from invading, ensuring the clarity and imaging quality of the lens.

[0028] Please refer to Figure 1 and Figure 3 , at the connection between the second lens barrel 120 and the third lens barrel 130, there is an auxiliary connection barrel 140. The auxiliary connection barrel 140 plays a role of a bridge. It tightly connects the second lens barrel 120 and the third lens barrel 130 together, ensuring the stability and coordination between the two. In this way, whether during use or during maintenance and adjustment, it can provide convenience and facility. The existence of the auxiliary connection barrel 140 not only enhances the stability of the overall structure but also improves the efficiency and effect of use.

[0029] The first lens barrel 110, the second lens barrel 120, and the third lens barrel 130 are all hollow; at one end of the first lens barrel 110 connected to the second lens barrel 120, a first lens 111 is provided; at one end of the third lens barrel 130 connected to the second lens barrel 120, a second lens 131 is provided; there is a spacing distance between the first lens 111 and the second lens 131.

[0030] Please refer to Figure 1 , for the first lens barrel 110, the second lens barrel 120, and the third lens barrel 130, they are all designed to be hollow, which can provide necessary space for the installation of internal components, and at the same time can reduce the overall weight and improve the convenience of use. At one end of the first lens barrel 110, where it is connected to the second lens barrel 120, the first lens 111 is provided. The first lens 111 can initially focus the incoming light to ensure that the subsequent optical system can receive clear light. And at one end of the third lens barrel 130, where it is connected to the second lens barrel 120, the second lens 131 is provided. The second lens 131 can further focus and adjust the light to ensure that the final optical system can receive high-quality light. There is a certain spacing distance between these two lenses. Such a design can ensure the stability and accuracy of the light during transmission, and avoid affecting the performance of the optical system due to the distance between the lenses being too close or too far.

[0031] Please refer to Figure 2 , at the bottom of the outer body of the third lens barrel 130, a rack 132 is provided; at the bottom of the inside of the auxiliary connection barrel 140, a telescopic groove 141 is provided; in the middle part of the telescopic groove 141, a through gear groove 142 is provided. In the gear groove 142, a transmission gear 143 meshing with the rack 132 is provided; the transmission gear 143 is fixedly connected to a transmission shaft; both ends of the transmission shaft are respectively connected with a first runner 145 and a second runner.

[0032] At the bottom of the outer body of the third lens barrel 130, a fine rack 132 structure is provided. This rack 132 structure can provide stable gear engagement during mechanical operation, ensuring the efficiency and accuracy of power transmission. At the same time, a telescopic groove 141 is installed at the bottom inside the auxiliary connection barrel 140. The telescopic groove 141 can make the third lens barrel 130 extend and contract relative to the second lens barrel 120 when needed to adapt to different working requirements.

[0033] Please refer to Figure 2, Further, in the middle part of the telescopic slot 141, a through gear slot 142 is provided, which enables the gear to be smoothly installed in the slot and also facilitates the meshing between the gear and the rack 132. A precision transmission gear 143 meshing with the bottom rack 132 is assembled in the gear slot 142. This meshing can ensure the accuracy during the transmission process and has a better effect on the focal length adjustment between the first lens 111 and the second lens 131.

[0034] Please refer to Figure 1 and Figure 3 , both ends of the transmission shaft are respectively connected with a first runner 145 and a second runner. These two runners can drive the transmission shaft to rotate synchronously under the action of an external force, so as to transmit the power to the third lens barrel 130 and drive the third lens barrel 130 to displace relative to the second lens barrel 120. A limit cover 147 is further provided at the bottom of the transmission gear 143. Since the mechanism part of the gear transmission is arranged at the bottom and is suspended without fixation, it will fall off. Therefore, the limit cover 147 is provided to limit the transmission mechanism of the gear rack 132 to a fixed position through the limit cover 147, so that stable transmission operation can be carried out. Further, the limit cover 147 covers the meshing part of the transmission gear 143 and the rack 132, and a through hole for the transmission shaft is provided on the limit cover 147. The limit cover 147 is detachably connected to the telescopic slot 141. The transmission shaft passes through the through hole and can rotate.

[0035] Embodiment 2

[0036] Please refer to Figure 1 and Figure 2 , the embodiment of the present utility model provides a telescopic lens barrel convenient for adjustment. The limit cover 147 comprehensively covers the meshing area of the transmission gear 143 and the rack 132, ensuring the complete protection of this part. A hole for the transmission shaft to pass through is also provided, which not only ensures the smooth passing of the transmission shaft but also takes into account the overall structural stability of the limit cover 147. In addition, this limit cover 147 can be conveniently disassembled for maintenance or replacement. It is connected to the telescopic slot 141 through a detachable connection method, improving the convenience of maintaining the transmission part.

[0037] Preferably, the inner diameter of the first lens barrel 110 is greater than that of the second lens barrel 120; the inner diameter of the second lens barrel 120 is greater than that of the third lens barrel 130. The third lens barrel 130 drives the distance between it and the first lens 111 to decrease or increase through the transmission of the transmission gear 143 and the rack 132.

[0038] Please refer to Figure 2, the inner diameter of the first lens barrel 110 should be larger than that of the second lens barrel 120; and the inner diameter of the second lens barrel 120 should also be larger than that of the third lens barrel 130. Such a setting can ensure the installation and sealing of the lens barrels and also create conditions for relative movement between the second lens barrel 120 and the third lens barrel 130. In addition, the third lens barrel 130 can achieve a free reduction or increase in the distance from the first lens barrel 110 through the transmission mechanism of the transmission gear 143 and the rack 132. This flexible adjustment function enables the entire lens system to better adapt to different shooting requirements, thereby improving the shooting quality and effect.

[0039] Please refer to Figure 1 , at one end of the third lens barrel 130 away from the second lens 131, there is a mounting portion; the third lens barrel 130 is detachably provided with an observation component through the mounting portion. The third lens barrel 130 is provided with a dedicated mounting portion at one end away from the second lens 131; the function of this mounting portion is to enable the component for observation to be easily disassembled and assembled with the third lens barrel 130. It loads the observation component into it in a detachable manner. In this way, users can easily install or replace the observation component according to their needs, greatly improving the flexibility and expandability of the device. Preferably, at the bottom of the second lens barrel 120, there is a hinge platform 160; on both sides of the hinge platform 160, there are respectively a first hinge plate 161 and a second hinge plate 162, and on the first hinge plate 161 and the second hinge plate 162, there are coaxial hinge holes 163.

[0040] Please refer to Figure 2 , furthermore, at the bottom of the second lens barrel 120 of the present invention, there is designed a hinge platform 160, which is used to achieve the flexible assembly of the whole lens barrel with other components. On both sides of the hinge platform 160, there are respectively a first hinge plate 161 and a second hinge plate 162, and these two hinge plates play a role in support and connection. More importantly, on the first hinge plate 161 and the second hinge plate 162, there are coaxial hinge holes 163. The setting of these hinge holes 163 enables the hinge plates to be connected with coaxial components, thereby providing more stable and reliable connection performance. The setting of the hinge platform 160 enables the lens barrel to be installed with other mounting frames or receiving frames, and can be fixedly installed or rotatably connected with the mounting frames or receiving frames through the hinge holes 163 on the first hinge plate 161 and the second hinge plate 162. This gives the lens barrel more adjustment possibilities.

[0041] In use, the required observation component is installed through the installation part of the third lens barrel 130, and the images received by the first lens 111 and the second lens 131 are observed through the observation component. During observation, it is necessary to adjust the focal length between the first lens 111 and the second lens 131 to achieve the quality of the required image. At this time, rotate the first rotating wheel 145 or the second rotating wheel 146, so that the real-time third lens barrel 130 moves in the direction of approaching or moving away from the real-time first lens 111, so that the second lens 131 approaches or moves away from the first lens 111. Through real-time adjustment and observation, when the required degree is reached, stop the adjustment. Adjustment and observation can be carried out simultaneously, completing the real-time observation and adjustment of the imaging effect, which is very convenient and fast in use. Through the transmission cooperation of gears and racks, the vibration generated during the adjustment between the third lens barrel and the second lens barrel of the present utility model is small and the stability is high.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A telescopic lens barrel that is easy to adjust, characterized in that: It comprises a first lens barrel (110), a second lens barrel (120) and a third lens barrel (130); two ends of the second lens barrel (120) are respectively connected to the first lens barrel (110) and the second lens barrel (120); An auxiliary connecting tube (140) is provided at the connection between the second lens barrel (120) and the third lens barrel (130); the first lens barrel (110), the second lens barrel (120) and the third lens barrel (130) are all hollow; A rack (132) is provided at the bottom of the outer body of the third lens barrel (130); a telescopic slot (141) is provided at the bottom of the interior of the auxiliary connecting tube (140); a through gear slot (142) is provided in the middle of the telescopic slot (141); a transmission gear (143) meshing with the rack (132) is provided in the gear slot (142); the transmission gear (143) is fixedly connected to a transmission shaft; a rotating wheel is provided on the transmission shaft; and a limit cover (147) is provided at the bottom of the transmission gear (143).

2. The conveniently adjustable telescopic lens barrel according to claim 1, characterized in that: The limiting cover (147) covers the part where the transmission gear (143) meshes with the rack (132), and a through hole for the transmission shaft is provided on the limiting cover (147).

3. The conveniently adjustable telescopic lens barrel according to claim 2, characterized in that: The limiting cover (147) is detachably arranged at the bottom of the telescopic slot (141).

4. The conveniently adjustable telescopic lens barrel according to claim 1, characterized in that: The rotating wheel comprises a first rotating wheel (145) and a second rotating wheel (146); the first rotating wheel (145) and the second rotating wheel (146) are respectively fixedly arranged at two ends of the transmission shaft.

5. The conveniently adjustable telescopic lens barrel according to claim 1, characterized in that: The first lens barrel (110) is provided with a first lens (111) at one end connected to the second lens barrel (120); the third lens barrel (130) is provided with a second lens (131) at one end connected to the second lens barrel (120); and a spacing distance is provided between the first lens (111) and the second lens (131).

6. The conveniently adjustable telescopic lens barrel according to claim 1, characterized in that: The inner diameter of the first lens barrel (110) is greater than that of the second lens barrel (120); and the inner diameter of the second lens barrel (120) is greater than that of the third lens barrel (130).

7. The conveniently adjustable telescopic lens barrel according to claim 5, characterized in that: The third lens barrel (130) reduces or increases the distance between the second lens (131) and the first lens (111) through the relative movement of the transmission gear (143) and the rack (132).

8. The conveniently adjustable telescopic lens barrel according to claim 5, characterized in that: The third lens barrel (130) is provided with a mounting portion (170) at one end away from the second lens (131); the third lens barrel (130) is detachably provided with an observation component via the mounting portion (170).

9. The conveniently adjustable telescopic lens barrel according to claim 1, characterized in that: A hinged platform (160) is provided at the bottom of the second lens barrel (120); and a first hinged plate (161) and a second hinged plate (162) are respectively provided on two sides of the hinged platform (160).

10. The conveniently adjustable telescopic lens barrel according to claim 9, characterized in that: The first hinge plate (161) and the second hinge plate (162) are provided with coaxial hinge holes (163).

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