CN220252260U - Focusing device for lens - Google Patents

Abstract

The utility model provides a focusing device for a lens, which comprises a lens holder, a lens barrel, a transmission assembly, a shell and two focusing knobs, wherein the lens holder, the lens barrel and the transmission assembly are all arranged in a containing cavity of the shell, the two focusing knobs are respectively and rotatably arranged at two sides of the shell, the lens holder is at least partially contained in a guide channel of the lens barrel and can reciprocate along the guide channel, the transmission assembly can drive the lens holder to move along the guide channel when the focusing knobs are driven to rotate, and when the focusing knobs rotate clockwise, the lens holder is driven to move towards a first extending direction of the guide channel, and when the focusing knobs rotate anticlockwise, the lens holder is driven to move towards a second extending direction of the guide channel, wherein the first extending direction and the second extending direction are opposite to each other.

Description

Focusing device for lens

Technical Field

The present disclosure relates to optical lenses, and particularly to a focusing device for a lens.

Background

Manual focusing is a focusing method widely used in focusing lenses, and is used for a user to change the distance between a front lens group and a rear lens group in a manner of manually adjusting a focusing mechanism, so that the lenses can focus on objects with different distances, and the definition of an image is adjusted. This approach is most common in professional devices such as cameras and video cameras, and some high-end lenses also support manual focusing.

At present, a common manual focusing mode realizes a focusing function by rotating a focusing knob. However, the focus knob is typically positioned in a centered position on the top of the lens, and the user is required to raise his or her hand to the top of the lens and move to the centered position for further manipulation during focusing. Although the above design can ensure that two types of users with different hands are not too difficult to focus, the scheme of the compromise does not accord with ergonomics, and the focusing mode is complex and laborious for both users with left hands and right hands, and can easily lead to fatigue of arms and wrists in the focusing process, thereby influencing the smoothness and efficiency of operation.

Disclosure of Invention

The utility model has the main advantages that the focusing device for the lens comprises two focusing knobs which are respectively arranged at two sides of the focusing device, and a user can independently rotate the focusing knobs at any side to focus, so that the user who uses the hand for the left hand can conveniently rotate the left focusing knob to focus, and the user who uses the hand for the right hand can conveniently rotate the right focusing knob to focus, thereby enhancing the operability of the focusing device and widening the applicable crowd and applicable scenes of the focusing device.

Another advantage of the present utility model is to provide a focusing apparatus for a lens, wherein a transmission assembly of the focusing apparatus is capable of converting rotation of the focus knob into translational movement (linear movement) of a lens holder of the focusing apparatus, so that the lens holder is capable of reciprocating along an optical axis of the lens, thereby implementing a focusing function of the focusing apparatus.

Another advantage of the present utility model is to provide a focusing apparatus for a lens, wherein the driving assembly includes a driving lever, a driving ring, and a driving pin, wherein when the focusing knob is rotated by a user, the driving lever is driven to rotate by the focusing knob, and then the driving ring is driven to rotate by the driving lever, and then the driving pin is driven by the driving ring to move along the optical axis under the co-guiding action of a first guiding groove of the driving ring and a second guiding groove of a lens barrel of the focusing apparatus, and finally, the lens holder is driven to move along the optical axis by the driving pin. In view of this, the focusing device is not only ingenious in design, but also has stronger reliability and higher integration level.

Other advantages and features of the present utility model will become apparent from the following detailed description.

Accordingly, according to the present utility model, a focusing device for a lens having at least one of the above advantages comprises:

the lens holder, the lens cone, the transmission assembly, the casing and two focusing knobs, wherein the lens holder, the lens cone and the transmission assembly are all installed in the accommodating cavity of the casing, the two focusing knobs are respectively rotatably arranged on two sides of the casing, wherein the lens holder is at least partially accommodated in the guide channel of the lens cone, the lens holder is arranged to reciprocate along the guide channel, the transmission assembly is arranged to drive the lens holder to move along the guide channel when the focusing knobs are driven to rotate, wherein when the focusing knobs rotate clockwise, the lens holder is driven to move towards a first extending direction of the guide channel, and when the focusing knobs rotate anticlockwise, the lens holder is driven to move towards a second extending direction of the guide channel, and the first extending direction and the second extending direction are opposite to each other.

In one embodiment, the transmission assembly comprises a transmission rod, wherein two ends of the transmission rod are respectively connected with the corresponding focusing knobs, so that the two focusing knobs and the transmission rod can synchronously rotate, co-rotate and coaxially rotate.

In one embodiment, the transmission rod comprises a shaft rod and screw thread teeth, wherein the screw thread teeth are arranged on the shaft rod, and two ends of the shaft rod are respectively connected with the corresponding focusing knobs.

In one embodiment, the transmission assembly further comprises a transmission ring and at least one transmission pin, wherein the transmission ring is rotatably sleeved on the lens barrel, and the transmission pin is fixedly connected to the lens holder in a manner of penetrating through a first guide groove of the transmission ring and a second guide groove of the lens barrel, wherein the transmission pin is partially accommodated in the first guide groove, and the transmission pin is partially accommodated in the second guide groove.

In one embodiment, the lens barrel comprises a limiting part, a guiding part and an avoidance part, wherein the guiding part extends between the limiting part and the avoidance part, the guiding part is used for forming the guiding channel and the second guiding groove, the limiting part is used for limiting the transmission ring, the transmission ring comprises a main body part, an extending part and a meshing part, the extending part extends between the main body part and the meshing part, the main body part is rotatably sleeved on the guiding part of the lens barrel, the meshing part is meshed with the thread teeth of the transmission rod, the first guiding groove is formed in the main body part, and the meshing part is provided with a group of meshing teeth.

In one embodiment, the first guide groove is formed obliquely to the main body portion of the drive ring, the second guide groove is formed to the guide portion of the lens barrel, and the second guide groove extends to both sides in the first extending direction and the second extending direction.

In one embodiment, the avoidance portion of the lens barrel is provided with an avoidance opening, wherein the engagement portion of the drive ring is opposite to the avoidance opening.

In one embodiment, the focusing device further comprises a base, wherein the base is fixedly installed in the accommodating cavity of the housing, the base is sleeved on the avoidance portion of the lens barrel, the avoidance portion of the lens barrel is fixedly connected to the base, the main body portion of the driving ring is limited by the limiting portion of the lens barrel and the base together, the base is provided with an avoidance opening, and the avoidance opening is opposite to the avoidance opening of the avoidance portion of the lens barrel.

In one embodiment, the base is further provided with an alignment groove, wherein the shaft of the transmission rod is at least partially accommodated in the alignment groove.

In one embodiment, the focusing apparatus further comprises a release stop, wherein the shaft of the drive rod is constrained between the release stop and the base.

In one embodiment, the guide channel of the lens barrel extends along an extending direction of an optical axis of the lens.

In one embodiment, the axis of rotation of the drive rod is perpendicular to the optical axis of the lens.

In one embodiment, the second guide groove extends along an extending direction of the optical axis of the lens.

The foregoing and other advantages of the utility model will become more fully apparent from the following description and appended drawings.

The above and other advantages and features of the present utility model are readily apparent from the following detailed description of the utility model and the accompanying drawings.

Drawings

Fig. 1 is a perspective view of a focusing apparatus for a lens according to an embodiment of the present utility model.

Fig. 2 is an assembly schematic of a focusing apparatus for a lens according to an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view of a focusing apparatus for a lens according to an embodiment of the present utility model.

Fig. 4 is a schematic top view of a lens barrel of a transmission assembly of a focusing apparatus for a lens according to an embodiment of the present utility model.

Fig. 5 is a perspective view of a transmission assembly of a focusing apparatus for a lens according to an embodiment of the present utility model.

Fig. 6 is a perspective view of a transmission rod of a transmission assembly of a focusing apparatus for a lens according to an embodiment of the present utility model.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to practice the utility model. Other obvious substitutions, modifications and changes will occur to one of ordinary skill in the art. Thus, the scope of the utility model should not be limited by the exemplary embodiments described herein.

It will be understood by those of ordinary skill in the art that the terms "a" or "an" should be understood as "at least one" or "one or more" unless specifically indicated herein, i.e., in one embodiment, the number of elements may be one, and in other embodiments, the number of elements may be multiple.

It will be appreciated by those of ordinary skill in the art that unless specifically indicated herein, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., refer to an orientation or position based on that shown in the drawings, merely for convenience of description of the present utility model, and do not denote or imply that the devices or elements involved must have a particular orientation or position. Accordingly, the above terms should not be construed as limiting the present utility model.

Referring to fig. 1 to 6 of the drawings, a focusing apparatus for a lens according to an embodiment of the present utility model is illustrated, which comprises a lens holder 1, a lens barrel 2, a transmission assembly 3, a housing 4, and two focusing knobs 5, wherein the lens holder 1, the lens barrel 2, and the transmission assembly 3 are each installed in a receiving chamber 40 of the housing 4, the two focusing knobs 5 are rotatably disposed at both sides of the housing 4, respectively, wherein the lens holder 1 is at least partially received in a guide channel 20 of the lens barrel 2, and the lens holder 1 is disposed to be reciprocally movable along the guide channel 20, wherein the transmission assembly 3 is configured to be capable of driving the lens holder 1 to move along the guide channel 20 when the focusing knobs 5 are driven to rotate, wherein the lens holder 1 is driven to move toward a first extending direction of the guide channel 20 when the focusing knobs 5 are driven to rotate clockwise, and the lens holder 1 is driven to move toward a second extending direction of the guide channel 20 when the focusing knobs 5 are driven to rotate counterclockwise. Accordingly, the user can realize the focusing function of the focusing apparatus by rotating the focusing knob 5. In other words, the transmission assembly 3 of the focusing apparatus can convert the rotation of the focusing knob 5 into the translational movement (linear movement) of the lens holder 1 of the focusing apparatus, so that the lens holder 1 can reciprocate along the optical axis of the lens, thereby realizing the focusing function of the focusing apparatus. It is worth mentioning that the guiding channel 20 extends along the direction of extension of the optical axis, wherein the first direction of extension and the second direction of extension of the guiding channel 20 may also be regarded as two opposite directions of extension of the optical axis.

As shown in fig. 1 to 6 of the drawings, in particular, the transmission assembly 3 of the focusing apparatus for a lens according to an embodiment of the present utility model includes a transmission rod 31, wherein both ends of the transmission rod 31 are respectively connected to the corresponding focusing knobs 5 so that the focusing knobs 5 can rotate the transmission rod 31 and the transmission rod 31 can rotate the focusing knobs 5, wherein the transmission rod 31 is rotated clockwise/counterclockwise when the focusing knobs 5 are rotated clockwise/counterclockwise, and the focusing knobs 5 are rotated clockwise/counterclockwise when the transmission rod 31 is rotated clockwise/counterclockwise. It will be appreciated that when the user rotates the focus knob 5 on one side of the housing 4 of the focus adjustment device using only one dominant hand, the transmission rod 31 rotates, and the focus knob 5 on the other side of the housing 4 of the focus adjustment device is also driven to synchronously rotate in the same direction by the transmission of the transmission rod 31. In other words, the two focus knobs 5 and the transmission rod 31 are provided to be capable of rotating synchronously and in the same direction, so that the user can select either side of the focus knobs 5 to rotate when focusing. The term "co-rotation" refers to that when the focusing device is observed with one side as a fixed observation side, both the two focusing knobs 5 and the transmission rod 31 rotate clockwise or counterclockwise. Because the two focusing knobs 5 are respectively arranged on two sides of the shell 4 of the focusing device, and a user can independently rotate the focusing knob 5 on any side to focus, so that the user who uses the hand as the left hand rotates the left focusing knob 5 to focus, and the user who uses the hand as the right hand rotates the right focusing knob 5 to focus, the operability of the focusing device is enhanced, and the applicable crowd and applicable scenes of the focusing device are widened.

Specifically, the transmission rod 31 includes a shaft 311 and a thread tooth 312, wherein the thread tooth 312 is disposed on the shaft 311, two ends of the shaft 311 are respectively connected with the corresponding focusing knobs 5, the focusing knobs 5 drive the shaft 311 to rotate, and the shaft 311 drives the thread tooth 312 to rotate. Preferably, the transmission rod 31 is embodied as a worm. Preferably, the rotation axis of the transmission rod 31 is perpendicular to the first extending direction and the second extending direction of the guide passage 20, in other words, the rotation axis of the transmission rod 31 is perpendicular to the optical axis. It will be appreciated that the two focusing knobs 5 and the driving rod 31 both rotate around the central axis of the shaft 311 as a rotation axis.

As shown in fig. 5 and 6 of the drawings, the driving assembly 3 of the focusing apparatus for a lens according to the embodiment of the present utility model further includes a driving ring 32 and at least one driving pin 33, wherein the driving ring 32 is rotatably sleeved on the lens barrel 2, the driving pin 33 is fixedly connected to the lens holder 1 in a manner of passing through a first guide groove 320 of the driving ring 32 and a second guide groove 200 of the lens barrel 2, wherein the driving pin 33 is partially accommodated in the first guide groove 320, and the driving pin 33 is partially accommodated in the second guide groove 200. Optionally, the connection manner of the driving pin 33 and the lens seat 1 includes, but is not limited to, threaded connection, snap connection, interference fit, adhesion, magnetic attraction, etc., as in one embodiment of the present utility model, the driving pin 33 is in threaded connection with the lens seat 1, wherein the connection end of the driving pin 33 and the connection hole of the lens seat 1 are respectively provided with external threads and internal threads that are matched with each other. Specifically, the lens barrel 2 includes a limiting portion 21, a guiding portion 22, and a avoiding portion 23, wherein the guiding portion 22 extends between the limiting portion 21 and the avoiding portion 23, the guiding portion 22 is used for forming the guiding channel 20 and the second guiding groove 200, and the limiting portion 21 is used for limiting the driving ring 32 so as to prevent the driving ring 32 from moving toward the direction of the limiting portion 21. The driving ring 32 includes a main body 321, an extension portion 322, and an engagement portion 323, where the extension portion 322 extends between the main body 321 and the engagement portion 323, the main body 321 is rotatably sleeved on the guide portion 22 of the lens barrel 2, the engagement portion 323 is engaged with the thread teeth 312 of the driving rod 31, the first guide groove 320 is formed in the main body 321, and the engagement portion 323 is provided with a set of engagement teeth 3231. Preferably, when the drive rod 31 is embodied as a worm, the engagement 323 of the drive ring 32 is embodied as part of a worm gear, so as to form a drive fit of the worm gear.

It will be appreciated that the drive ring 32 is restrained such that the drive ring 32 can only rotate about the barrel 2, i.e. about the optical axis, without moving in the first or second direction of extension, wherein the restraining portion 21 of the barrel 2 is able to restrain the main body portion 321 of the drive ring 32 on one side of the drive ring 32. Alternatively, in some embodiments of the present utility model, the main body 321 of the transmission ring 32 is limited by the lens barrel 21 and the base 6, and one end of the lens barrel 2 is fixedly connected to the base 6. Alternatively, in other embodiments of the present utility model, as shown in fig. 1, the focusing apparatus further includes a base 6, wherein the base 6 is configured to limit the main body 321 of the driving ring 32 on the other side of the driving ring 32.

As shown in fig. 1 to 6, more specifically, the first guide groove 320 of the driving ring 32 of the driving assembly 3 for a focusing device for a lens according to an embodiment of the present utility model is formed obliquely to the main body portion 321 of the driving ring 32, wherein the "oblique" means that a distance D1 between a first end 3201 of the first guide groove 320 and an end face 3210 of the main body portion 321 is not equal to a distance D2 between a second end 3202 of the first guide groove 320 and an end face 3210 of the main body portion 321. Optionally, in some embodiments of the utility model, the distance D1 is greater than the distance D2. Alternatively, in other embodiments of the present utility model, the distance D1 is less than the distance D2. It is understood that the larger the difference between the distance D1 and the distance D2, the larger the inclination of the first guide groove 320. Accordingly, the second guide groove 200 is formed in the guide portion 22 of the lens barrel 2 in parallel to the optical axis, wherein the second guide groove 200 may be regarded as extending in the first extending direction, may be regarded as extending in the second extending direction, and may be regarded as extending to both sides in the first extending direction and the second extending direction, respectively. In other words, the second guide groove 200 extends in the extending direction of the optical axis.

When the user rotates the focus knob 5, the screw teeth 312 of the transmission rod 31 are rotated, and the transmission ring 32 is rotated around the lens barrel 2 due to the engagement of the engagement portion 323 of the transmission ring 32 with the screw teeth 312, wherein the rotation axis of the transmission ring 32 is the optical axis. With the rotation of the driving ring 32, the groove wall of the first guiding groove 320 abuts against the driving pin 33, and transmits a force to the driving pin 33 to push the driving pin 33 to move, wherein if the driving ring 32 is used as a stationary reference object, the driving pin 33 can move from an initial position to the first end 3201 of the first guiding groove 320 or to the second end 3202 of the first guiding groove 320, that is, can reciprocate between the first end 3201 of the first guiding groove 320 and the second end 3202 of the first guiding groove 320, relative to the driving ring 32. Further, due to the guiding action of the second guiding groove 200 of the lens barrel 2 on the driving pin 33, the driving pin 33 is constrained and guided to move only along the extending direction of the optical axis, such as to move towards the first extending direction or move towards the second extending direction, so as to drive the lens holder 1 to move along the optical axis, thereby realizing focusing. In other words, when the focusing knob 5 is rotated by a user, the focusing knob 5 drives the transmission rod 31 to rotate, then the transmission rod 31 drives the transmission ring 32 to rotate, then the transmission pin 33 is driven by the transmission ring 3 to move along the optical axis under the co-guiding action of the first guiding groove 320 of the transmission ring 32 and the second guiding groove 200 of the lens barrel 2 of the focusing device, and finally the transmission pin 33 drives the lens base 1 to move along the optical axis. In view of this, the focusing device is not only ingenious in design, but also has stronger reliability and higher integration level.

In some embodiments of the present utility model, the drive ring 32 cannot continue to rotate when the drive pin 33 moves to the first end 3201 of the first guide slot 320 or to the second end 3202 of the first guide slot 320, blocked by the drive pin 33. In other embodiments of the present utility model, when the driving pin 33 moves to the first end 2001 of the second guiding groove 200 or moves to the second end 2002 of the second guiding groove 200, the driving ring 32 cannot continue to rotate due to the fact that the driving pin 33 cannot continue to move any more, which is blocked by the driving pin 33. Preferably, when the driving pin 33 moves to the first end 3201 of the first guide groove 320, the driving pin 33 moves to the second end 2002 of the second guide groove 200 exactly, and when the driving pin 33 moves to the second end 3202 of the first guide groove 320, the driving pin 33 moves to the first end 2001 of the second guide groove 200 exactly.

In order to avoid interference caused by the lens barrel 2 on the setting and rotation of the transmission ring 32, the avoidance portion 23 of the lens barrel 2 is provided with an avoidance opening 230, so as to allow the transmission ring 32 to be installed from one side of the avoidance portion 23, and further sleeved on the lens barrel 2. When the drive ring 32 rotates, the engagement portion 323 of the drive ring 32 always faces the escape opening 230 of the escape portion 23.

In some embodiments of the present utility model, as shown in fig. 1 to 4, the focusing device includes the base 6, wherein the base 6 is fixedly installed in the accommodating cavity 40 of the housing 4, the base 6 is sleeved on the avoiding portion 23 of the lens barrel 2, and the avoiding portion 23 of the lens barrel 2 is fixedly connected to the base 6, wherein the main body portion 321 of the driving ring 32 is jointly limited by the limiting portion 21 of the lens barrel 2 and the base 6. Specifically, the base 6 is provided with an avoidance opening 60 for avoiding the engagement portion 323 of the transmission ring 32 and the thread teeth 312 of the transmission rod 31, wherein the avoidance opening 60 of the base 6 is opposite to the avoidance opening 230 of the avoidance portion 23 of the lens barrel 2. Further, the base 6 is further provided with an alignment slot 600, so as to support and constrain the shaft 311 of the driving rod 31, so as to facilitate alignment and installation of the driving rod 31, and play a role in constraining the rotation of the driving rod 31, so as to prevent the shaft 311 from being laterally offset, where at least part of the shaft 311 of the driving rod 31 is accommodated in the alignment slot 600. In order to enhance the restraining action of the shaft 311 of the transmission rod 31 and prevent the shaft 311 from being separated from the alignment groove 600, in some embodiments of the present utility model, the focusing apparatus further includes a release stopper 7, wherein the shaft 311 of the transmission rod 31 is restrained between the release stopper 7 and the base 6.

In particular, to facilitate the installation of the transmission assembly 3, the housing 4 is provided with an operating opening 400, wherein the operating opening 400 is directly opposite to the engagement portion 323 of the transmission ring 32 and the screw teeth 312 of the transmission rod 31. The focusing apparatus further includes a cover plate 401, wherein the cover plate 401 is provided to the operation opening 400 of the housing 4 for closing the operation opening 400.

It is noted that the first and second are used herein only to name and distinguish between different components (or elements) of the present utility model, which themselves do not have a somewhat sequential or numerical meaning.

It will be appreciated by persons skilled in the art that the embodiments described above and shown in the drawings are only for the purpose of illustrating the utility model and are not to be construed as limiting the utility model. All equivalent implementations, modifications and improvements within the spirit of the present utility model are intended to be included within the scope of the present utility model.

Claims (13)

1. A focusing apparatus for a lens, comprising:

the lens holder, the lens cone, the transmission assembly, the casing and two focusing knobs, wherein the lens holder, the lens cone and the transmission assembly are all installed in the accommodating cavity of the casing, the two focusing knobs are respectively rotatably arranged on two sides of the casing, wherein the lens holder is at least partially accommodated in the guide channel of the lens cone, the lens holder is arranged to reciprocate along the guide channel, the transmission assembly is arranged to drive the lens holder to move along the guide channel when the focusing knobs are driven to rotate, wherein when the focusing knobs rotate clockwise, the lens holder is driven to move towards a first extending direction of the guide channel, and when the focusing knobs rotate anticlockwise, the lens holder is driven to move towards a second extending direction of the guide channel, and the first extending direction and the second extending direction are opposite to each other.

2. The focusing apparatus for a lens according to claim 1, wherein the transmission assembly includes a transmission lever, wherein both ends of the transmission lever are respectively connected with the respective focusing knobs, so that the two focusing knobs and the transmission lever are provided to be capable of being rotated synchronously, rotated in the same direction, and rotated coaxially.

3. The focusing apparatus for a lens according to claim 2, wherein the transmission rod includes a shaft and screw teeth, wherein the screw teeth are provided to the shaft, and both ends of the shaft are respectively connected to the corresponding focusing knobs.

4. The focusing apparatus for a lens of claim 3, wherein the driving assembly further comprises a driving ring rotatably sleeved on the lens barrel, and at least one driving pin fixedly connected to the lens holder in such a manner as to pass through a first guide groove of the driving ring and a second guide groove of the lens barrel, wherein the driving pin portion is received in the first guide groove and the driving pin portion is received in the second guide groove.

5. The focusing device for a lens barrel according to claim 4, wherein the lens barrel includes a limiting portion, a guide portion and a relief portion, wherein the guide portion extends between the limiting portion and the relief portion, the guide portion is configured to form the guide passage and the second guide groove, the limiting portion is configured to limit the transmission ring, the transmission ring includes a main body portion, an extending portion and an engaging portion, wherein the extending portion extends between the main body portion and the engaging portion, the main body portion is rotatably sleeved on the guide portion of the lens barrel, the engaging portion is engaged with the screw teeth of the transmission rod, wherein the first guide groove is formed in the main body portion, and the engaging portion is provided with a set of engaging teeth.

6. The focusing device for a lens barrel according to claim 5, wherein the first guide groove is formed obliquely to the main body portion of the drive ring, the second guide groove is formed to the guide portion of the lens barrel, and the second guide groove extends to both sides in the first extending direction and the second extending direction.

7. The focusing device for a lens according to claim 6, wherein the escape portion of the lens barrel is provided with an escape opening, wherein the engagement portion of the drive ring is opposite to the escape opening.

8. The focusing device for a lens according to claim 7, further comprising a base, wherein the base is fixedly installed in the accommodation chamber of the housing, the base is sleeved on the avoiding portion of the lens barrel, and the avoiding portion of the lens barrel is fixedly connected to the base, wherein the main body portion of the drive ring is jointly limited by the limiting portion of the lens barrel and the base, the base is provided with an avoiding opening facing the avoiding opening of the avoiding portion of the lens barrel.

9. The focusing apparatus for a lens as claimed in claim 8, wherein the base is further provided with an alignment groove, wherein the shaft of the driving lever is at least partially accommodated in the alignment groove.

10. The focus adjustment device for a lens of claim 9, further comprising a release stop, wherein the shaft of the transmission rod is constrained between the release stop and the base.

11. The focusing apparatus for a lens according to any one of claims 1 to 10, wherein the guide passage of the lens barrel extends along an extending direction of an optical axis of the lens.

12. A focusing device for a lens according to any one of claims 2 to 10, wherein the rotation axis of the transmission rod is perpendicular to the optical axis of the lens.

13. The focusing apparatus for a lens according to any one of claims 4 to 10, wherein the second guide groove extends in an extending direction of an optical axis of the lens.