CN218383592U - Focusing driving device easy to disassemble and assemble - Google Patents

Abstract

An easy-to-mount/dismount focus driving apparatus, comprising: the guide assembly is detachably connected with the lens cone lengthening ring from the outside through the connecting piece and can extend to the inside of the lens cone lengthening ring through a mounting hole in the lens cone lengthening ring, and the guide assembly is provided with a through type shaft hole; the adjusting shaft penetrates through the through shaft hole, can rotate and can reciprocate along the axial lead direction of the through shaft hole; one end of the adjusting shaft extends to the outside of the guide assembly, and the other end of the adjusting shaft extends to the inside of the lens cone lengthening ring; the driving gear is arranged at one end of the adjusting shaft, which is positioned in the lens barrel lengthening ring, and is used for being meshed with a driven gear which can focus on a lens; and the operating part is arranged at one end of the adjusting shaft extending to the outside of the guide assembly. The guide assembly in the device is arranged on the lens barrel lengthening ring from the outside in a detachable installation mode through the connecting piece, and compared with the previous fixing mode, the focusing driving device is more convenient to disassemble and assemble.

Description

Focusing driving device easy to disassemble and assemble

Technical Field

The application relates to the technical field of underwater photography equipment, in particular to a focusing driving device easy to disassemble and assemble.

Background

In most cases, a clear photograph or video can be taken by the camera autofocus system by pressing a camera shutter or a camera key. However, when the ambient light is too weak or the target contrast is insufficient, the auto-focusing system of the camera is prone to misjudgment; when the target moves too fast, the continuous focus or follow-up system of the camera may not respond in time to the occurrence of a wait period. Therefore, many lenses are provided with a manual focus mechanism at the front end, and an operating element of the manual focus mechanism is usually a focus ring.

When underwater photography is carried out, a camera is arranged in a waterproof camera shell, a driven gear is sleeved on the outer part of a lens focusing ring, and the driven gear and the focusing ring synchronously rotate by setting friction force; the lens and the driven gear are protected in the lens cone protective cover, the camera waterproof shell is connected with the lens cone protective cover through the lens cone lengthening ring, the interface position between the lens cone lengthening ring and the camera waterproof shell and the lens cone protective cover is waterproof and pressure-proof through a sealing mechanism, and under the condition, a manual focusing driving device can be arranged outside the lens cone lengthening ring or the lens cone protective cover only, so that torque is transmitted to the inside of the lens cone lengthening ring or the waterproof cover, the driven gear is driven to focus, and focusing action is achieved.

In order to ensure the connection stability, the manual focusing driving device is usually connected with the lens cone lengthening ring or the lens cone protective cover in a threaded connection mode, and in order to improve the safety and the reliability in the use process, the manual focusing driving device is usually screwed down with set large torque, thread anti-loosening glue is coated at the threaded connection part, and the thread is prevented from loosening after the manual focusing driving device is solidified. However, with the development and combination of auto-focusing and Artificial Intelligence (AI) technologies, the intellectualization of cameras is improved, and many underwater photographers no longer need manual focusing functions. In addition, the manual focusing driving device is completely arranged outside the lens barrel and protrudes more, so that the manual focusing driving device occupies space and influences the convenience of users, and some users hope to detach the manual focusing driving device, but the manual focusing driving device is not convenient to detach because the manual focusing driving device is connected through threads and is prevented from loosening through the thread anti-loosening glue.

SUMMERY OF THE UTILITY MODEL

The application aims at providing the focusing driving device which is easy to disassemble and assemble, so that an operator can flexibly disassemble and assemble the focusing driving device according to the use requirement.

The application provides a drive arrangement that focuses of easy dismouting includes:

a connecting member;

the guide assembly is detachably connected with the lens cone lengthening ring from the outside of the lens cone lengthening ring through the connecting piece, the guide assembly can extend to the inside of the lens cone lengthening ring through a mounting hole in the lens cone lengthening ring, and the guide assembly is provided with a through type shaft hole;

the adjusting shaft penetrates through the through shaft hole, can rotate and can reciprocate along the axial lead direction of the through shaft hole; one end of the adjusting shaft extends to the outside of the guide assembly, and the other end of the adjusting shaft extends to the inside of the lens cone lengthening ring;

the driving gear is arranged at one end of the adjusting shaft, which is positioned in the lens barrel lengthening ring, and is used for being meshed with a driven gear which can focus on a lens;

the operating part is arranged at one end of the adjusting shaft extending to the outside of the guide assembly.

In one embodiment, the connector comprises: the connecting bolt, the relative both sides of direction subassembly are equipped with the bolt via hole, the direction subassembly passes through connecting bolt and wears to locate bolt via hole and spiro union are in the screw hole of lens cone extension circle to detachably be connected to lens cone extension circle.

In one embodiment, the method further comprises: the limiting part is arranged at one end, extending to the lens cone lengthening ring, of the adjusting shaft and used for limiting the movement of the adjusting shaft along the axial lead of the through shaft hole towards the outer direction of the guide assembly.

In one embodiment, the guide assembly has a top extension extending from a top surface of the guide assembly and a bottom extension extending from a bottom surface of the guide assembly; the top extension section gradually reduces in circumference from one end of the top extension section far away from the guide assembly to one end of the top extension section close to the guide assembly; the through-type shaft hole penetrates through the top extension section and the bottom extension section.

In one embodiment, the method further comprises: the first sealing piece is arranged between the adjusting shaft and the penetrating type shaft hole to seal a gap between the adjusting shaft and the penetrating type shaft hole.

In one embodiment, the first seal comprises: the adjusting shaft is provided with a first annular mounting groove, the first sealing ring is arranged in the first annular mounting groove, and the line diameter of the first sealing ring is larger than the radial depth of the first annular mounting groove.

In one embodiment, the method further comprises: and the second sealing element is arranged between the guide assembly and the lens barrel lengthening ring and used for sealing a gap between the guide assembly and the lens barrel lengthening ring.

In one embodiment, the second seal comprises: the second sealing washer, the direction subassembly is equipped with second annular mounting groove, the second sealing washer set up in second annular mounting groove, just the line footpath of second sealing washer is greater than the radial degree of depth of second annular mounting groove.

In one embodiment, the driving gear is detachably mounted at one end of the adjusting shaft located inside the lens barrel lengthening ring.

In one embodiment, the operating member is detachably mounted to an end of the adjusting shaft extending to the outside of the guide assembly.

According to the focusing driving device easy to disassemble and assemble in the embodiment, the guide assembly is detachably installed on the lens cone lengthening ring from the outside through the connecting piece, the connecting piece can be disassembled from the outside of the lens cone lengthening ring by means of a universal tool so as to complete disassembling and assembling of the guide assembly, and compared with a conventional fixing mode, the focusing driving device is more convenient to disassemble and assemble flexibly.

Drawings

Fig. 1 is a schematic view of a focusing driving device easy to disassemble and assemble, which is provided by the present application, installed behind a lens barrel lengthening ring and between a camera waterproof case and a lens barrel protective cover;

FIG. 2 is a perspective view of a focusing driving device with easy assembly and disassembly provided by the present application;

FIG. 3 is a schematic view of the focusing driving device of the present application installed on the lens barrel extension ring for easy assembly and disassembly;

FIG. 4 is a cross-sectional view of the focusing driving device of the present application installed on the lens barrel extension ring for easy assembly and disassembly;

fig. 5 is a schematic view of the lens barrel extension ring being plugged by the plugging cover after the focusing driving device easy to disassemble and assemble is disassembled from the lens barrel extension ring;

FIG. 6 is a partial cross-sectional view of FIG. 5;

fig. 7 is a schematic view of the structure of the block cover.

Description of reference numerals:

the focusing driving device 1000, the connecting member 10, the guide assembly 20, the connecting portion 21, the connecting lug 211, the bolt through hole 212, the through-type shaft hole 22, the adjusting shaft 30, the first threaded hole 31, the second threaded hole 32, the driving gear 40, the first bolt 41, the first gasket 42, the operating member 50, the second bolt 51, the second gasket 52, the blocking cover 53, the first sealing member 60, the first sealing ring 61, the first annular mounting groove 62, the second sealing member 70, the second sealing ring 71, the second annular mounting groove 72, the limiting member 80, the blocking cover 90, the blocking cover connecting lug 91, the blocking cover through hole 92, the blocking cover bolt 93 and the plug 94; a third seal assembly 100, a third seal ring 101, a third annular mounting groove 102;

a lens barrel lengthening ring 200, a mounting hole 201 and a threaded hole 202;

a camera 300, a lens 301, a focus ring 3010, a c-shaped clamp ring 302, a driven gear 303;

a camera waterproof case 401, a lens barrel protective cover 402 and a transparent window 403.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in this specification in order not to obscure the core of the present application with unnecessary detail, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operation steps involved in the embodiments may be interchanged or modified in order as will be apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of description of certain embodiments and are not intended to necessarily refer to a required composition and/or order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Referring to fig. 1, when underwater photography is performed, a camera 300 is usually placed in a camera waterproof case 401 (only a part of the structure of the camera waterproof case 401 is shown in fig. 1 for illustration, and the whole structure of the camera waterproof case 401 is not shown), a lens 301 mounted on the camera 300 is located in a lens barrel protective cover 402, a transparent window 403 facing the lens 301 is arranged at the front end of the lens barrel protective cover 402, the distance between the transparent window 403 and the lens 301 can be changed by adjusting the length of the lens barrel lengthening ring 200, so as to adjust the transparent window 403 to be matched with the lens 301 in a proper position to adapt to the use of the lenses 301 with different lengths, and the lens 301 can be used for framing and imaging through the transparent window 403. Specifically, the camera waterproof case 401 and the lens barrel protective cover 402 are connected through the lens barrel extension ring 200, and the lens barrel extension ring 200 is hermetically connected with the camera waterproof case 401 and the lens barrel protective cover 402, so that the camera 300 and the lens 301 are waterproof. In general, the camera waterproof case 401 and the lens barrel protective case 402 are made of high-strength PC plastic or aluminum alloy material to bear underwater pressure, so as to ensure normal use of the camera 300.

The focusing driving device 1000 easy to disassemble and assemble is installed on the lens barrel lengthening ring 200, the C-shaped clamping ring 302 is sleeved on the focusing ring 3010 of the lens 301, the outer portion of the C-shaped clamping ring 302 is in contact with the driven gear 303, and the C-shaped clamping ring 302 and the focusing ring 3010 of the lens 301 can be driven to synchronously rotate under the action of friction force by rotating the driven gear 303 so as to adjust the focusing distance of the lens. Since the driven gear 303 is located inside the lens barrel shield 402, the driving gear 40 of the focusing driving device 1000 extends into the lens barrel extension ring 200 and engages with the driven gear 303, and the driven gear 303 is driven to rotate by the focusing driving device 1000, so that the focusing operation of the camera and the lens from the outside is realized.

In this embodiment, the focusing driving device 1000 is mounted on the lens barrel extension ring 200 in an easy-to-detach manner, so that the focusing driving device 1000 can be detached quickly without using it. Of course, after the focusing driving device 1000 is removed from the lens barrel extension ring 200, the mounting hole for mounting the device on the lens barrel extension ring 200 needs to be sealed by a sealing cover. The following examples are referred to for a detailed description.

Referring to fig. 2 to 4, the focusing driving apparatus 1000 of the present embodiment includes: a connecting member 10, a guide assembly 20, an adjustment shaft 30, a driving gear 40 and an operating member 50.

The guide assembly 20 is detachably connected to the barrel extension ring 200 from the outside of the barrel extension ring 200 through the connector 10. The lens barrel lengthening ring 200 is further provided with a mounting hole 201, and the guide assembly 200 can extend into the lens barrel lengthening ring 200 through the mounting hole 201 on the lens barrel lengthening ring 200.

The guide member 20 is provided with a through-hole 22, and the through-hole 22 penetrates the height direction of the guide member 20. Specifically, the through-hole 22 is inserted into the barrel extension ring 200. The adjusting shaft 30 is inserted into the through-hole 22, and the adjusting shaft 30 is rotatable and capable of reciprocating along the axial line direction of the through-hole 22. In some embodiments, the axial diameter of the adjusting shaft 30 may be considered to be substantially the same as the diameter of the through-shaft hole 22, so that the adjusting shaft 30 can rotate around its own axial line or the axial line of the through-shaft hole 22 in the through-shaft hole 22, and can also reciprocate along its own axial line direction or the axial line direction of the through-shaft hole 22 in the through-shaft hole 22. In this embodiment, one end of the adjusting shaft 30 extends to the outside of the guiding component 20, and the other end of the adjusting shaft 30 extends to the inside of the lens barrel extension ring 200.

Of course, the barrel extension ring 200 is provided with a through hole, so that the other end of the adjusting shaft 30 passes through the through hole and extends into the through hole. It can be understood that the lens barrel extension ring 200 is connected with the camera waterproof case 401 and the lens barrel protective cover 402 in a sealing connection manner, and the sealing performance is not affected by the arrangement of the through hole.

In this application, the lens barrel extension ring 200, the lens barrel protective cover 402 and the camera waterproof cover 401 are split structures, so that the lens barrel extension ring 200 and the lens barrel protective cover 402 can be adjusted in length or size to meet the use requirements of the lenses 301 with different specifications (such as viewing angle and length). Certainly, in other embodiments, the lens barrel extension ring 200 and the lens barrel shield 402 may be made into an integrated structure, so as to simplify the production cost.

The driving gear 40 is disposed at one end of the adjusting shaft 30 located inside the barrel extension ring 200, and the operating member 50 is disposed at one end of the adjusting shaft 30 extending to the outside of the guide assembly 20. As shown in fig. 5, the driving gear 40 is engaged with a driven gear 303 capable of focusing on a lens, wherein the C-shaped clamp ring 302 is clamped on the focus ring 3010 of the lens 301, and the C-shaped clamp ring 302 is contacted with the driven gear 303. When the operating member 50 is rotated by an external force to drive the adjusting shaft 30 to rotate, the rotating adjusting shaft 30 drives the driving gear 40, the driving gear 40 drives the driven gear 303 engaged with the driving gear to synchronously rotate, the driven gear 303 drives the C-shaped clamping ring 302 to synchronously rotate under the action of friction force, and similarly, the focusing ring 3010 on the lens 301 is synchronously driven to rotate under the action of friction force between the C-shaped clamping ring 302 and the focusing ring 3010, so that the focusing distance of the lens is adjusted.

In the above embodiment, the operation member 50 is rotated by an external force (for example, the operator rotates the operation member 50 by hand), so that the adjustment shaft 30 is rotated in the through-hole 22, but of course, the adjustment shaft 30 is driven to reciprocate along the axial direction of the through-hole 22 by pushing and pulling the operation member 50. When the operating element 50 is pulled outwards, an assembly space can be made free, so that the lens 301 installed on the camera, the C-shaped clamping ring 302 sleeved on the lens focusing ring 3010, the driven gear 303 and the like can be pushed forwards from the back of the camera waterproof shell 401 and installed at a preset position; then, the operating member 50 is pushed inward to a predetermined position, so that the driving gear 40 and the driven gear 303 are engaged with each other. The rotating adjusting shaft 30 drives the driven gear 302 to rotate synchronously through the driving gear 40, and the rotating driven gear 302 can perform focusing adjustment on the lens of the camera 300.

In one embodiment of the present application, when the focusing driving device 1000 needs to be removed, the connection between the driving gear 40 and the adjusting shaft 30 is removed first, and then the connection between the guiding assembly 20 and the lens barrel extension ring 200 is removed, so that the focusing driving device 1000 can be easily pulled out. After the focusing driving device 1000 is pulled out, the mounting hole 201 of the lens barrel extension ring 200 is sealed by a sealing cover 90 (shown in fig. 5-7) to ensure the sealing performance of the mounting hole 201. The guiding assembly 20 in this embodiment is detachably connected to the barrel extension ring 200 in a quick-release manner, so as to facilitate the detachment of the focusing driving apparatus 1000.

Of course, the above-described removal process is performed when the barrel extension ring 200 is not attached to the camera waterproof case 401 and the barrel guard 402.

In this embodiment, the guiding assembly 20 is provided with a connecting portion 21, and the connecting portion 10 specifically detachably connects the connecting portion 21 with the barrel extension ring 200 from the outside of the barrel extension ring 200, and more specifically, the connecting portion 10 may adopt a structure such as a bolt, a buckle, and the like to detachably connect the connecting portion 21 with the barrel extension ring 200 from the outside of the barrel extension ring 200.

As shown in fig. 2 and 4, the connecting portion 21 is a connecting lug 211 disposed on two opposite sides of the guide assembly 20, the connecting lug 211 is provided with a bolt through hole 212, correspondingly, the lens barrel extension ring 200 is provided with a threaded hole 202, and after the guide assembly 20 is mounted in the mounting hole 201 of the lens barrel extension ring 200, the bolt through hole 212 is opposite to the threaded hole 202. In this embodiment, the connecting member 10 is a connecting bolt, and the connecting lug 211 is threaded into the threaded hole 202 of the lens barrel extension ring 200 through the connecting bolt passing through the bolt passing hole 212, so that the guide assembly 20 is detachably connected to the lens barrel extension ring 200 from the outside of the lens barrel extension ring 200. Through connecting bolt's setting, accessible universal tool is dismantled connecting bolt to after dismantling connecting bolt, the dismantlement of this device is accomplished to the mode that the accessible pulled out the direction subassembly, so, in order to simplify the dismouting of this device.

In this application, there is certain clearance between regulating spindle 30 and the through-type shaft hole 22, for the inside that moisture entered into lens protection casing 402 when avoiding under water photography, the drive arrangement 100 that focuses of the easy dismouting that this application provided still includes: and the first sealing element 60 is arranged between the adjusting shaft 30 and the through shaft hole 22, so as to seal the gap between the adjusting shaft 30 and the through shaft hole 22.

In another embodiment of the present application, there is also a certain gap between the guiding assembly 20 and the lens barrel extension ring 200, so that the focusing driving apparatus 100 provided in the present application, which is easy to disassemble and assemble, further includes: and a second sealing member 70, wherein the second sealing member 70 is disposed between the guide assembly 20 and the barrel extension ring 200, and is used for sealing a gap between the guide assembly 20 and the barrel extension ring 200. Therefore, the sealing performance of the focusing driving device is improved.

In one embodiment of the present application, the adjusting shaft 30 is in clearance fit with the through-hole 22 to ensure that the adjusting shaft 30 can rotate in the through-hole 22 and can move back and forth along the axial direction of the through-hole 22. By providing the first seal 60, the gap between the adjustment shaft 30 and the through-shaft hole 22 can be sealed.

It should be noted that the first sealing member 60 does not restrict the rotation and axial movement of the adjustment shaft 30 in the through-shaft hole 22 in the process of sealing the gap between the adjustment shaft 30 and the through-shaft hole 22.

In one embodiment of the present application, the assembling process of the focusing driving device 1000 with easy assembly and disassembly provided by the present application is as follows:

before the focusing driving device 1000 is mounted on the lens barrel extension ring 200, the driving gear 40 is detached from the other end of the adjusting shaft 30, the guide assembly 20 is inserted into the mounting hole 201 of the lens barrel extension ring 200, the guide assembly 20 is mounted on the lens barrel extension ring 200 in a manner that the connecting piece 10 is inserted into the bolt through hole 212 of the connecting lug 211 and screwed into the threaded hole 202 of the lens barrel extension ring 200, and finally the driving gear 40 is mounted back to the adjusting shaft 30 and is locked and fixed by the first bolt 41, thus completing the assembly of the focusing driving device 1000.

The focusing driving device 1000 easy to disassemble and assemble provided by the present application further includes: and a limiting member 80, wherein the limiting member 80 is disposed at one end of the adjusting shaft 30 extending to the inside of the barrel extension ring 200, and the limiting member 80 is used for limiting the movement of the adjusting shaft 30 along the axial line of the through-type shaft hole 22 toward the outside direction of the guide assembly 20.

In a preferred embodiment, the limiting member 80 is detachably disposed on the adjusting shaft 30. In a more preferred embodiment, the limiting member 80 is a snap spring catch, a snap groove is disposed on the shaft body at the other end of the adjusting shaft 30, the snap spring catch is snapped in the snap groove, and the snap spring catch can limit the movement of the adjusting shaft 30 along the direction from the axial line of the through-hole 22 to the outside of the guiding assembly 20 through the end of the guiding assembly 20 extending to the inside of the lens barrel lengthening ring 200.

In one embodiment of the present application, the guide assembly 20 has a top extension 23 and a bottom extension 24, the top extension 23 extends from the top surface of the guide assembly 20, the bottom extension 24 extends from the bottom surface of the guide assembly 20, wherein the bottom of the bottom extension 24 extends to the inside of the barrel extension ring 200, and the through-hole 22 penetrates the top extension 23 and the bottom extension 24. In this embodiment, the circumference of the top extension section 23 gradually decreases from the end thereof far away from the guide assembly 20 to the end thereof close to the guide assembly 20, taking the view angle shown in fig. 1 as an example, the direction from the end thereof far away from the guide assembly 20 to the end thereof close to the guide assembly 20 is the direction from top to bottom, in other words, the circumference of the top extension section 23 gradually decreases from top to bottom, so that the diameter of the top extension section 23 at the end thereof far away from the wire drum assembly 20 is larger, and when the guide assembly 20 is pulled out, on one hand, the operator can conveniently hold the top extension section, and on the other hand, the end with the larger circumference can make the pulling-out process receive a larger pulling-out force, thereby facilitating the operation of the operator.

Referring to fig. 4, the first seal 60 includes: the first sealing ring 61 is provided with a first annular mounting groove 62 on the adjusting shaft 30 in this embodiment, and in other embodiments, the first annular mounting groove 62 may also be provided on the through-type shaft hole 22, or between the adjusting shaft 30 and the through-type shaft hole 22. The first sealing ring 61 is disposed in the first annular mounting groove 62, and the radial diameter of the first sealing ring 61 is greater than the radial depth of the first annular mounting groove 62, so that the first sealing ring 61 protrudes out of the first annular mounting groove 62.

In a preferred embodiment, the first sealing ring 61 is made of a silica gel material, and when the first sealing ring 61 is located between the adjusting shaft 30 and the through-type shaft hole 22, the first sealing ring 61 is in a pre-pressing state due to the elastic action of the first sealing ring 61, so that a sealing effect can be achieved.

On the one hand, can make and reach sealed effect between regulating spindle 30 and the through-type shaft hole 22, on the other hand, can play the damping effect to regulating spindle 30, make regulating spindle 30 and through-type shaft hole 22 reach the relation of tight fit, the relation of this kind of tight fit, because the elastic action of first sealing washer 61 can make regulating spindle 30 can enough follow through-type shaft hole 22 reciprocating motion, also can guarantee that regulating spindle 30 can not axial displacement again after removing to target in place, the location is in the position department after removing to target in place promptly. Therefore, when the focusing drive device needs to be mounted on the lens barrel or dismounted from the lens barrel, the driving gear 40 can be retracted to form an escape space by pulling the adjusting shaft 30 outwards, or the driving gear 40 is disengaged from the driven gear 303, and the adjusting shaft 30 can be kept at the moved position under the damping effect of the first sealing ring 61, so that the focusing drive device is more convenient to dismount.

In the process of attaching and detaching the focusing drive device 1000, the adjustment shaft 30 is always attached to the through-hole 22 of the guide unit 20, and only the guide unit 20 and the attachment hole 201 need to be attached and detached, so that the attachment and detachment process can be simplified, and the possibility of damage to the first seal ring 61 due to excessive attachment and detachment can be avoided.

With continued reference to fig. 4, the second seal 70 includes: the second sealing ring 71, in this embodiment, the guide assembly 20 is provided with a second annular mounting groove 72, in other embodiments, the second annular mounting groove 72 may be disposed on the hole wall of the mounting hole 201 of the lens barrel extension ring 200, or the second annular mounting groove 72 is disposed between the mounting hole 201 of the lens barrel extension ring 200 and the guide assembly 20. The second sealing ring 71 is disposed in the second annular mounting groove 72, and the diameter of the second sealing ring 71 is greater than the depth of the second annular mounting groove 72, so that the second sealing ring 71 protrudes out of the second annular mounting groove 72.

In one embodiment of the present application, the driving gear 40 is detachably mounted to the other end of the adjustment shaft 30.

Specifically, a first threaded hole 31 is formed in the end portion of the other end of the adjusting shaft 30, a first through hole is formed in the driving gear 40, a first bolt 41 is inserted into the first through holes of the first spacer 42 and the driving gear 40, the driving gear 40 is pressed by the first spacer 42, and the first bolt 41 is screwed into the first threaded hole 31, so that the driving gear 40 can be detachably mounted on the other end of the adjusting shaft 30.

In one embodiment of the present application, the operating member 50 is also detachably mounted to one end of the adjustment shaft 30.

Specifically, the second screw hole 32 is provided at the other end of the adjusting shaft 30, the second through hole is opened in the operating element 50, the second bolt 51 is inserted into the second through holes of the second spacer 52 and the operating element 50, the operating element 50 is pressed by the second spacer 52, and the second bolt 51 is screwed into the second screw hole 32, so that the operating element 50 can be detachably mounted at one end of the adjusting shaft 30. In the present embodiment, a cap 53 for plugging the second through hole is further provided above the second bolt 51, so that foreign matter can be prevented from entering the second through hole, and the appearance of the handle can be improved.

Referring to fig. 5 to 7, after the focusing driving apparatus 1000 is removed from the lens barrel extension ring 200, in order to ensure the sealing performance of the mounting hole 201 on the lens barrel extension ring 200, a blocking cover 90 may be further disposed at the mounting hole 201, and a third sealing assembly 100 is disposed between the blocking cover 90 and the mounting hole 201 to seal a gap between the blocking cover 90 and the mounting hole 201.

In the present embodiment, the third seal assembly 100 includes: a third sealing ring 101 and a third annular mounting groove 102, wherein the third annular mounting groove 102 is disposed on the blocking cap 90, the third sealing ring 101 is disposed in the third annular mounting groove 102, and likewise, the linear diameter of the third sealing ring 101 is greater than the depth of the third annular groove 92, that is, the third sealing ring 101 protrudes out of the third annular groove 92. When the plugging cover 90 is mounted in the mounting hole 201, the protruding portion of the third seal ring 101 is located between the plugging cover 90 and the hole wall of the mounting hole 201 to seal the gap between the plugging cover 90 and the mounting hole 201.

In one embodiment of the present application, the opposite sides of the blocking cover 90 are also provided with blocking cover engaging lugs 91, both blocking cover engaging lugs 91 are provided with blocking cover via holes 92, both blocking cover via holes 92 correspond to the threaded holes 202 provided on the lens barrel extension ring 200 one-to-one, and the blocking cover bolts 93 pass through the blocking cover via holes 92 and are screwed in the threaded holes 202, so that the blocking cover 90 is fixed in the mounting hole 201 of the lens barrel extension ring 200 and is sealed by the third sealing assembly 100. In this embodiment, the plugging cover via hole 92 is plugged by the plug 94, so that foreign matters can be prevented from entering the plugging cover via hole 92, and the attractiveness of the installation of the plugging cover 90 can be ensured.

In addition, the sizes of the driven gear 303 and the C-shaped clamping ring 302 can be adjusted as required to be sleeved on a zoom ring (not shown in the figure) of the lens 301, and the zoom ring is used for adjusting the field angle of the lens, so that the focusing driving device drives the driven gear 303, the C-shaped clamping ring 302 and the zoom ring of the lens 301 to synchronously rotate under the action of friction force through the meshing of the driving gear 40 and the driven gear 303, and the zooming action is completed from the outside of the lens barrel extension ring 200.

In summary, in the focusing driving device easy to disassemble and assemble provided by the present application, the guiding component is detachably mounted on the lens barrel extension ring from the outside through the connecting component, and the connecting component can be disassembled from the outside of the lens barrel extension ring by means of a general tool to complete the disassembling and assembling of the guiding component.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (10)

1. A focusing driving device easy to disassemble and assemble is characterized by comprising:

a connecting member;

the guide assembly is detachably connected with the lens cone lengthening ring from the outside of the lens cone lengthening ring through the connecting piece, the guide assembly can extend to the inside of the lens cone lengthening ring through a mounting hole in the lens cone lengthening ring, and the guide assembly is provided with a through type shaft hole;

the adjusting shaft penetrates through the through shaft hole, can rotate and can reciprocate along the axial lead direction of the through shaft hole; one end of the adjusting shaft extends to the outside of the guide assembly, and the other end of the adjusting shaft extends to the inside of the lens cone lengthening ring;

the driving gear is arranged at one end of the adjusting shaft, which is positioned in the lens barrel lengthening ring, and is used for being meshed with a driven gear which can focus on a lens;

the operating part is arranged at one end of the adjusting shaft extending to the outside of the guide assembly.

2. The easy-to-mount/dismount focus drive apparatus of claim 1, wherein the connecting member comprises: the connecting bolt, the relative both sides of direction subassembly are equipped with the bolt via hole, the direction subassembly passes through connecting bolt and wears to locate bolt via hole and spiro union are in the screw hole of lens cone extension circle to detachably be connected to lens cone extension circle.

3. The easy-to-mount/dismount focus drive apparatus according to claim 1, further comprising: the limiting part is arranged at one end, extending to the lens cone lengthening ring, of the adjusting shaft and used for limiting the movement of the adjusting shaft along the axial lead of the through shaft hole towards the outer direction of the guide assembly.

4. The easy-to-mount focus drive of claim 1 wherein said guide assembly has a top extension extending from a top surface of said guide assembly and a bottom extension extending from a bottom surface of said guide assembly; the top extension section gradually reduces in circumference from one end of the top extension section far away from the guide assembly to one end of the top extension section close to the guide assembly; the through-type shaft hole penetrates through the top extension section and the bottom extension section.

5. The easy-to-mount/dismount focus drive apparatus according to claim 1, further comprising: the first sealing piece is arranged between the adjusting shaft and the penetrating type shaft hole to seal a gap between the adjusting shaft and the penetrating type shaft hole.

6. The easy-to-mount/dismount focus drive of claim 5, wherein said first seal comprises: the first seal ring, the regulating spindle is equipped with first annular mounting groove, first seal ring set up in first annular mounting groove, just the line footpath of first seal ring is greater than the radial degree of depth of first annular mounting groove.

7. The easy-to-mount/dismount focus drive apparatus according to claim 1, further comprising: and the second sealing element is arranged between the guide assembly and the lens barrel lengthening ring and used for sealing a gap between the guide assembly and the lens barrel lengthening ring.

8. The easy-to-mount/dismount focus drive of claim 7, wherein said second seal comprises: the second sealing washer, the direction subassembly is equipped with second annular mounting groove, the second sealing washer set up in second annular mounting groove, just the line footpath of second sealing washer is greater than the radial degree of depth of second annular mounting groove.

9. The easy-to-mount/dismount focus drive apparatus according to claim 1, wherein the driving gear is detachably mounted to an end of the adjusting shaft located inside the barrel extension ring.

10. The focus drive apparatus of claim 1, wherein the operating member is detachably mounted to an end of the adjusting shaft extending to an outside of the guide member.

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