Lens module and optical set

Abstract

A lens module comprises a lens unit and a pressing ring. The pressing ring is fixed to the lens unit in a surrounding manner and comprises an annular side surface and at least one groove recessed in the annular side surface. Each groove comprises two opposite driving side walls and a limiting top wall connected with the two driving side walls. In addition, the optical set comprises the lens module and the focusing jig. The focusing jig is detachably arranged on the pressing ring in a surrounding mode and comprises at least one clamping piece, and the at least one clamping piece extends into the at least one groove. When the focusing jig is arranged on the pressing ring and the focusing jig rotates, each clamping piece pushes and abuts against one of the two driving side walls of the corresponding groove so as to drive the pressing ring and the lens unit to rotate.

Description

Technical Field

[0001] This utility model relates to a lens module and an optical assembly, and more particularly to a lens module with a smaller volume and an optical assembly of the lens module with a smaller volume. Background Technology

[0002] Currently, some lenses undergo an Auto Focus Tuning (AFT) process during pre-shipment inspection. These lenses have a retaining ring on the outside with a protruding latch. Before inspection, the focusing ring is placed over the retaining ring and then inserted into the inspection machine. During inspection, the machine pushes the focusing ring, which in turn pushes the protruding latch, rotating the lens to adjust the distance between the lens's back focus and the image sensor, thus obtaining the sharpest image.

[0003] However, the protruding buckle of the retaining ring takes up a lot of space, making the overall size of the lens and retaining ring quite large, and it is also easy to interfere with other mechanisms later. Utility Model Content

[0004] This invention provides a lens module with a small size.

[0005] An optical kit according to this utility model includes the lens module described above.

[0006] This utility model discloses a lens module, including a lens unit and a retaining ring. The retaining ring is fixedly attached to the lens unit and includes an annular side surface and at least one groove recessed in the annular side surface, wherein each groove includes two opposing driving side walls and a limiting top wall connecting the two driving side walls.

[0007] In one embodiment of the present invention, the lens module further includes a lens mount to support the lens unit, wherein the annular side surface of the pressure ring includes a bottom edge near the lens mount, each groove is recessed within the bottom edge of the annular side surface, and the limiting top wall faces the lens mount.

[0008] In one embodiment of the present invention, the at least one groove mentioned above includes a plurality of grooves, which are arranged at equal intervals.

[0009] In one embodiment of the present invention, the aforementioned annular side surface includes a first part and a second part, the height of the first part being greater than the height of the second part, and the first part being farther away from the lens mount that carries the lens unit than the second part.

[0010] In one embodiment of the present invention, the lens unit includes a first region and a second region, the first region protruding radially from the second region, and the height of the first part of the pressure ring is greater than the height of the first region of the lens unit.

[0011] In one embodiment of the present invention, the second part of the pressure ring has a gap with the lens unit.

[0012] In one embodiment of the present invention, the annular side surface of the pressure ring has a top edge, the top edge having a portion extending toward the axis of the pressure ring and extending above the lens unit.

[0013] This utility model discloses an optical assembly, including a lens module and a focusing fixture. The lens module includes a lens unit and a retaining ring. The retaining ring is fixedly attached to the lens unit and includes an annular side surface and at least one groove recessed in the annular side surface, wherein each groove includes two opposing driving side walls and a limiting top wall connecting the two driving side walls. The focusing fixture is detachably disposed around the retaining ring and includes at least one engaging member extending into at least one groove. When the focusing fixture is disposed on the retaining ring and the focusing fixture rotates, each engaging member pushes against one of the two driving side walls of the corresponding groove, thereby causing the retaining ring and the lens unit to rotate.

[0014] In one embodiment of the present invention, the width of each of the grooves is greater than the width of the corresponding engaging member, thereby creating a gap between the engaging member and at least one of the two driving sidewalls of the corresponding groove.

[0015] In one embodiment of the present invention, the above-mentioned focusing fixture includes at least one lug, which is suitable for being driven to rotate by manual or focusing equipment.

[0016] In one embodiment of the present invention, the focusing fixture includes a first half-ring portion, a second half-ring portion and a fixing pin. The first half-ring portion includes a first pivot end and a first fixing hole, and the second half-ring portion includes a second pivot end and a second fixing hole. The first pivot end is pivotally connected to the second pivot end, and the fixing pin is insertably and detachably disposed in the first fixing hole and the second fixing hole.

[0017] In one embodiment of the present invention, the at least one groove includes a plurality of grooves that are equally spaced apart, and the at least one engaging member includes a plurality of engaging members that are disposed on the first half-ring portion and the second half-ring portion.

[0018] In one embodiment of the present invention, the aforementioned at least one lug includes two lugs, with a first pivot end and a second pivot end located in one of the two lugs, and a first fixing hole and a second fixing hole located in the other of the two lugs.

[0019] In one embodiment of the present invention, the optical assembly further includes a lens mount and a lens unit, wherein the annular side surface of the pressure ring includes a top edge away from the lens mount, and the focusing fixture includes at least one stop portion. When the focusing fixture is disposed on the pressure ring, at least one stop portion is located on the top edge of the pressure ring.

[0020] In one embodiment of the present invention, the optical assembly further includes a lens mount to support the lens unit, wherein the annular side surface of the pressure ring includes a bottom edge near the lens mount, and each groove is recessed within the bottom edge of the annular side surface. When the focusing fixture is placed on the pressure ring, each locking member faces the corresponding limiting top wall.

[0021] In one embodiment of the present invention, the aforementioned annular side surface includes a first part and a second part, the height of the first part being greater than the height of the second part, and the first part being farther away from the lens mount that carries the lens unit than the second part.

[0022] In one embodiment of the present invention, the lens unit includes a first region and a second region, the first region protruding radially from the second region, and the height of the first part of the pressure ring is greater than the height of the first region of the lens unit.

[0023] In one embodiment of the present invention, the second part of the pressure ring has a gap with the lens unit.

[0024] In one embodiment of the present invention, the annular side surface of the pressure ring has a top edge, the top edge having a portion extending toward the axis of the pressure ring and extending above the lens unit.

[0025] Based on the above, the retaining ring of the lens module of this utility model includes a groove recessed into the annular side surface, and each groove includes two opposing driving sidewalls and a limiting top wall connecting the two driving sidewalls. Since the retaining ring of the lens module of this utility model has no protruding structure, it can have a smaller volume and is less prone to interference when installed within an electronic device. Furthermore, the focusing fixture of the optical assembly of this utility model is detachably ringed around the retaining ring. When the focusing fixture is installed on the retaining ring, the engaging member of the focusing fixture can extend into the groove of the retaining ring. The focusing fixture can be rotated by the focusing ring. At this time, the engaging member of the focusing fixture pushes against the driving sidewall of the groove of the retaining ring, thereby causing the retaining ring and the lens unit to rotate to adjust the focal length. Attached Figure Description

[0026] Figure 1 and Figure 2 This is a schematic diagram of a lens module from different perspectives according to an embodiment of the present invention.

[0027] Figure 3 It is Figure 1 A schematic diagram showing the upward movement of the pressure ring.

[0028] Figure 4 and Figure 5 This is a schematic diagram of an optical assembly from different perspectives according to an embodiment of the present invention.

[0029] Figure 6 It is along Figure 5 A cross-sectional diagram of line segment AA.

[0030] Figure 7 yes Figure 4 A schematic diagram of the perspective of the first half of the ring.

[0031] Figure 8A and Figure 8B yes Figure 4 Schematic diagram of the first half-ring from different perspectives.

[0032] Figure 9A and Figure 9B yes Figure 4 Schematic diagram of the second half-ring from different perspectives.

[0033] The annotations in the attached figures are explained as follows:

[0034] G: Gap

[0035] W1, W2: Width

[0036] 10: Optical Kit

[0037] 100: Lens Module

[0038] 110: Lens Unit

[0039] 110a: Zone 1

[0040] 110b: Second District

[0041] 120: Pressure Ring

[0042] 121: Annular side surface

[0043] 121a: Part One

[0044] 121b: Part Two

[0045] 122: Top Edge

[0046] 123: Bottom edge

[0047] 125: Groove

[0048] 126: Drive the sidewall

[0049] 127: Limiting top wall

[0050] 130: Lens mount

[0051] 200: Focusing fixture

[0052] 210: Card assembly

[0053] 220: First half-ring

[0054] 222: First pivot end

[0055] 224: First fixing hole

[0056] 230: Second half-ring

[0057] 232: Second pivot end

[0058] 234: Second fixing hole

[0059] 240: Fixed pin

[0060] 250: Protruding ears

[0061] 260: Stop section Detailed Implementation

[0062] It should be noted that in the descriptions of the various embodiments, the terms "first" and "second" are used to describe different elements, and these elements are not limited by such predicates. Furthermore, for ease of description and clarity, the thickness or dimensions of the elements in the drawings are exaggerated, omitted, or approximated for the understanding and reading of those skilled in the art. The dimensions of each element are not exactly their actual dimensions and are not intended to limit the implementation of this utility model; therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and purposes achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. The same reference numerals will be used to denote the same or similar elements in all the drawings.

[0063] Figure 1 and Figure 2 This is a schematic diagram of a lens module from different perspectives according to an embodiment of the present invention. Figure 3 It is Figure 1 A schematic diagram showing the upward movement of the pressure ring. Please refer to [the diagram]. Figures 1 to 3 The lens module 100 of this embodiment includes a lens unit 110, a retaining ring 120, and a lens mount 130. The retaining ring 120 is fixedly attached to the lens unit 110, and the lens mount 130 carries the lens unit 110. The retaining ring 120 is screwed to the lens unit 110, for example, or, in one embodiment, the retaining ring 120 may be snap-fitted or glued to the lens unit 110. Therefore, when the retaining ring 120 is rotated, the lens unit 110 can rotate together with the retaining ring 120.

[0064] The retaining ring 120 includes an annular side surface 121 and at least one groove 125 recessed into the annular side surface 121. In this embodiment, the annular side surface 121 includes a first portion 121a, a second portion 121b, a bottom edge 123 adjacent to the lens mount 130 and located on the second portion 121b, and a top edge 122 distant from the lens mount 130 and located on the first portion 121a. The first portion 121a is farther from the lens mount 130 than the second portion 121b. Figure 3 As can be seen, in this embodiment, the height of the first portion 121a is greater than the height of the second portion 121b. Furthermore, the lens unit 110 includes a first region 110a and a second region 110b, and the height of the first portion 121a of the retaining ring 121 is greater than the height of the first region 110a of the lens unit 110. Therefore, the first portion 121a of the retaining ring 121 corresponds to the first region 110a and a portion of the second region 110b of the lens unit 110, and the second portion 121b of the retaining ring 121 corresponds to a portion of the second region 110b of the lens unit 110.

[0065] In this embodiment, the width of the second portion 121b is greater than the width of the first portion 121a (i.e., the outer diameter of the second portion 121b is greater than the outer diameter of the first portion 121a), causing the second portion 121b to slightly protrude from the first portion 121a. However, in other embodiments, the relationship between the first portion 121a and the second portion 121b is not limited to this. For example, in other embodiments, the outer diameter of the second portion 121b may be equal to the outer diameter of the first portion 121a. Figure 2 As shown, in this embodiment, since the second part 121b of the pressure ring 121 protrudes slightly from the first part 121a, there is a gap between the second part 121b of the pressure ring 121 and the lens unit 110.

[0066] Furthermore, in some embodiments, the top edge 122 of the annular side surface 121 of the pressure ring 121 may have a portion extending toward the axis of the pressure ring and extending above the lens unit 110 to limit the lens unit 110 and prevent the lens unit 110 from coming off above the pressure ring 121.

[0067] In this embodiment, at least one groove 125 includes a plurality of grooves 125, which are equally spaced in the second portion 121b. The equally spaced arrangement of these grooves 125 facilitates stable rotation of the lens module 100. Furthermore, in other embodiments, the grooves 125 may also be located in the first portion 121a, or may be located in both the first portion 121a and the second portion 121b.

[0068] In this embodiment, the number of grooves 125 is, for example, two, but the number of grooves 125 is not limited to this. In other embodiments, there may be only one groove 125 or more than two.

[0069] Depend on Figure 2 As can be seen, each groove 125 includes two opposing driving sidewalls 126 and a limiting top wall 127 connecting the two driving sidewalls 126. The groove 125 is recessed within the bottom edge 123 of the annular side surface 121, and the limiting top wall 127 faces the lens mount 130.

[0070] Since the lens module 100 in this embodiment is driven by the concave groove 125 to push the side wall 126 to drive the pressure ring 120 and the lens unit 110 to rotate, compared with the known pressure ring provided on the outside of the lens which has an outward protruding buckle, the lens module 100 in this embodiment can have a smaller volume. If the lens module 100 is subsequently installed in an electronic device (not shown), it is not easy to have mechanical interference with the installed electronic device because there is no outward protruding buckle.

[0071] The relevant structures used to drive the lens module 100 of this embodiment will be further described below.

[0072] Figure 4 and Figure 5 This is a schematic diagram of an optical assembly from different perspectives according to an embodiment of the present invention. Figure 6 It is along Figure 5 A cross-sectional diagram of line segment AA. Figure 7 yes Figure 4 A perspective view of the first half of the ring. Please refer to... Figures 4 to 7 The optical assembly 10 in this embodiment includes Figure 1 The lens module 100 and focusing fixture 200. The focusing fixture 200 is detachably mounted on the pressure ring 120. Figure 7 As shown, the focusing fixture 200 includes at least one engaging member 210, which may be, for example, a hook or a protrusion, but is not limited thereto. When the focusing fixture 200 is circumferentially disposed on the pressure ring 120, at least one engaging member 210 extends into at least one recess 125.

[0073] like Figure 3 As shown, in this embodiment, the first region 110a of the lens unit 110 protrudes radially from the second region 110b. This design provides more space for the engaging member 210 of the focusing fixture 200 to extend into the groove 125 (e.g., Figure 7 (As shown).

[0074] In this embodiment, there are two locking members 210, but the number of locking members 210 is not limited to this, as long as the number of locking members 210 corresponds to the number of grooves 125 and the position of the locking members 210 corresponds to the position of the grooves 125.

[0075] like Figure 6 As shown, the width W1 of each groove 125 is greater than the width W2 of the corresponding engaging member 210, resulting in a gap G between the engaging member 210 and at least one of the two driving sidewalls 126 of the corresponding groove 125. This design reduces interference or force exerted on the lens module 100 by the focusing fixture 200 when it is positioned behind the pressure ring 120 and has not yet rotated, and avoids wear on the lens module 100.

[0076] Furthermore, in this embodiment, the focusing fixture 200 includes at least one lug 250, adapted for rotation by manual operation or a focusing device (not shown). In this embodiment, the number of lugs 250 is, for example, two, and the two lugs 250 are, for example, located symmetrically, but the number and position of the lugs 250 are not limited thereto. In other embodiments, the number of lugs 250 may be one or more than two. If there are multiple lugs 250, these lugs 250 may be equidistantly arranged to allow the focusing fixture 200 to be rotated stably.

[0077] Before performing autofocus fine-tuning on the lens module 100, the focusing device (not shown, e.g., a focusing ring) is placed over the focusing fixture 200, and then the optical assembly 10 and the focusing device are placed together into the testing machine. During testing, the testing machine rotates the focusing device, which in turn causes the focusing fixture 200 to rotate. At this time, the engaging member 210 of the focusing fixture 200 pushes one of the grooves 125 of the pressure ring 120, driving the side wall 126, thereby causing the pressure ring 120 and the lens unit 110 to rotate together to adjust the focal length.

[0078] After the autofocus fine-tuning process is completed, the focusing device is removed from the focusing fixture 200, and the focusing fixture 200 is removed from the lens module 100. When the lens module 100 is subsequently assembled into the electronic device, since the pressure ring 120 does not protrude from the annular side surface 121, it is not easy to interfere with the mechanism inside the electronic device.

[0079] The following section will provide further details on the focusing fixture 200. Figure 8A and Figure 8B yes Figure 4 Schematic diagram of the first half-ring from different perspectives. Figure 9A and Figure 9B yes Figure 4 Schematic diagrams of the second half-ring from different perspectives. Please refer to... Figure 4 , Figure 5 , Figure 7 , Figures 8A to 9B In this embodiment, the focusing fixture 200 includes a first semi-ring portion 220, a second semi-ring portion 230, and a fixing pin 240. In this embodiment, the aforementioned two engaging members 210 are respectively disposed on the first semi-ring portion 220 and the second semi-ring portion 230. Of course, the position of the engaging members 210 is not limited thereto.

[0080] The first semi-ring portion 220 includes a first pivot end 222 and a first fixing hole 224, and the second semi-ring portion 230 includes a second pivot end 232 and a second fixing hole 234.

[0081] The first pivot end 222 of the first semi-ring portion 220 is pivotally connected to the second pivot end 232 of the second semi-ring portion 230, and the fixing pin 240 is insertably and detachably disposed in the first fixing hole 224 of the first semi-ring portion 220 and the second fixing hole 234 of the second semi-ring portion 230.

[0082] In this embodiment, the first pivot end 222 is, for example, a pivot shaft, and the second pivot end 232 is, for example, a pivot hole. In other embodiments, the first pivot end 222 is, for example, a pivot hole, and the second pivot end 232 is, for example, a pivot shaft. Alternatively, in other embodiments, the first pivot end 222 and the second pivot end 232 are, for example, two pivot holes, with the pivot shaft passing through the first pivot end 222 and the second pivot end 232.

[0083] Since the first pivot end 222 of the first semi-ring 220 is pivotally connected to the second pivot end 232 of the second semi-ring 230, the first semi-ring 220 and the second semi-ring 230 can rotate relative to each other. When the focusing fixture 200 is to be assembled to the lens module 100, the first semi-ring 220 is rotated relative to the second semi-ring 230 to expand the space between the first semi-ring 220 and the second semi-ring 23. Then, the first semi-ring 220 and the second semi-ring 23 are placed on the outside of the pressure ring 120, and the two engaging pieces 210 are aligned with the two grooves 125. Then, the first semi-ring 220 and the second semi-ring 230 are brought together to cover the pressure ring 120. Finally, the fixing pin 240 is inserted into the first fixing hole 224 of the first semi-ring 220 and the second fixing hole 234 of the second semi-ring 230 to complete the assembly.

[0084] In this embodiment, the first pivot end 222 and the second pivot end 232 are located on one of the two lugs 250, and the first fixing hole 224 and the second fixing hole 234 are located on the other lug 250. Therefore, in addition to allowing the focusing device or hand to rotate, the two lugs 250 can also integrate the first pivot end 222, the second pivot end 232, the first fixing hole 224, the second fixing hole 234, and the fixing pin 240, making the structure more streamlined and reducing the size.

[0085] Of course, in other embodiments, there may be only one lug 250. The first pivot end 222 and the second pivot end 232 may be disposed on this lug 250, and the first fixing hole 224 and the second fixing hole 234 may be located at other positions of the first semi-ring portion 220 and the second semi-ring portion 230. Alternatively, the first fixing hole 224 and the second fixing hole 234 may be disposed on this lug 250, and the first pivot end 222 and the second pivot end 232 may be located at other positions of the first semi-ring portion 220 and the second semi-ring portion 230. Or, the first pivot end 222 and the second pivot end 232, and the first fixing hole 224 and the second fixing hole 234 may not be located on the lug 250, but rather at other positions of the first semi-ring portion 220 and the second semi-ring portion 230.

[0086] Furthermore, the focusing fixture 200 includes at least one stop portion 260. More specifically, in this embodiment, there are multiple stop portions 260, disposed on the first semi-ring portion 220 and the second semi-ring portion 230. For example, there are four stop portions 260, with two stop portions 260 located in the first semi-ring portion 220 and separated from each other. The other two stop portions 260 are located in the second semi-ring portion 230 and separated from each other. These stop portions 260 can be equally spaced on the ring shape surrounded by the first semi-ring portion 220 and the second semi-ring portion 230. Of course, the number of stop portions 260 is not limited thereto.

[0087] like Figure 7 As shown, when the focusing fixture 200 is disposed on the pressure ring 120, the stop portion 260 is located on the top edge 122 of the pressure ring 120, which can restrict the focusing fixture 200 from moving downward relative to the pressure ring 120.

[0088] Additionally, when the focusing fixture 200 is positioned on the pressure ring 120, each engaging component 210 faces the corresponding limiting top wall 127. Figure 1 This restricts the upward movement of the focusing fixture 200 relative to the pressure ring 120. In this way, the focusing fixture 200 is prevented from dislodging from the pressure ring 120 in the vertical direction during rotation.

[0089] In this embodiment, since the focusing fixture 200 is detachably mounted on the retaining ring 120, when focusing the lens module 100 is required, the focusing fixture 200 is simply assembled onto the retaining ring 120 to perform the subsequent focusing procedure. After focusing is complete, the focusing fixture 200 is removed from the retaining ring 120, and the lens module 100 can be assembled into the subsequent electronic device. Because the lens module 100 has a small volume, it is less likely to cause interference within the electronic device and can be applied to electronic devices with smaller internal spaces.

[0090] In summary, the retaining ring of the lens module of this invention includes a groove recessed into the annular side surface, and each groove includes two opposing driving sidewalls and a limiting top wall connecting the two driving sidewalls. Because the retaining ring of the lens module of this invention has no protruding structure, it can have a smaller volume and is less prone to interference when installed within an electronic device. Furthermore, the focusing fixture of the optical assembly of this invention is detachably ringed around the retaining ring. When the focusing fixture is installed on the retaining ring, the engaging member of the focusing fixture can extend into the groove of the retaining ring. The focusing fixture can be rotated by the focusing ring. At this time, the engaging member of the focusing fixture pushes against the driving sidewall of the groove of the retaining ring, thereby causing the retaining ring and the lens unit to rotate to adjust the focal length.

[0091] Although the technical content of this utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit this utility model. Any modifications and alterations made by those skilled in the art without departing from the spirit of this utility model should be included within the scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the appended claims.

Claims

1. A lens module, characterized in that, include: Lens unit; as well as A pressure ring is circumferentially fixed to the lens unit and includes an annular side surface and at least one groove recessed in the annular side surface, wherein each groove includes two opposing drive sidewalls and a limiting top wall connecting the two drive sidewalls.

2. The lens module as described in claim 1, characterized in that, Also includes: A lens mount that supports the lens unit, wherein the annular side surface of the pressure ring includes a bottom edge near the lens mount, each of the grooves is recessed within the bottom edge of the annular side surface, and the limiting top wall faces the lens mount.

3. The lens module as described in claim 1, characterized in that, The at least one groove includes a plurality of grooves, which are arranged at equal intervals.

4. The lens module as described in claim 1, characterized in that, The annular side surface includes a first portion and a second portion, the height of the first portion being greater than the height of the second portion, and the first portion being farther away from the lens mount that supports the lens unit relative to the second portion.

5. The lens module as described in claim 4, characterized in that, The lens unit includes a first region and a second region, the first region protruding radially from the second region, and the height of the first portion of the pressure ring is greater than the height of the first region of the lens unit.

6. The lens module as described in claim 4, characterized in that, There is a gap between the second part of the pressure ring and the lens unit.

7. The lens module as described in claim 1, characterized in that, The annular side surface of the pressure ring has a top edge, the top edge having a portion extending toward the axis of the pressure ring and extending above the lens unit.

8. An optical assembly, characterized in that, include: Lens module, including: Lens unit; and A retaining ring is circumferentially fixed to the lens unit and includes an annular side surface and at least one groove recessed in the annular side surface, wherein each groove includes two opposing driving sidewalls and a limiting top wall connecting the two driving sidewalls; and The focusing fixture has a detachable ground ring disposed on the pressure ring ring and includes at least one engaging member that extends into the at least one groove. When the focusing fixture is positioned on the pressure ring and the focusing fixture rotates, each of the engaging components pushes against one of the two driving sidewalls of the corresponding groove, thereby causing the pressure ring and the lens unit to rotate.

9. The optical assembly as described in claim 8, characterized in that, The width of each groove is greater than the width of the corresponding engaging member, so that there is a gap between the engaging member and at least one of the two driving sidewalls of the corresponding groove.

10. The optical assembly as described in claim 8, characterized in that, The focusing fixture includes at least one lug, which is adapted to be driven to rotate manually or by a focusing device.

11. The optical assembly as described in claim 10, characterized in that, The focusing fixture includes a first half-ring, a second half-ring, and a fixing pin. The first half-ring includes a first pivot end and a first fixing hole, and the second half-ring includes a second pivot end and a second fixing hole. The first pivot end is pivotally connected to the second pivot end, and the fixing pin is insertably inserted through the first fixing hole and the second fixing hole.

12. The optical assembly as described in claim 11, characterized in that, The at least one groove includes multiple grooves, which are equally spaced. The at least one engaging member includes multiple engaging members, which are disposed on the first half-ring portion and the second half-ring portion.

13. The optical assembly as described in claim 11, characterized in that, The at least one lug includes two lugs, with the first pivot end and the second pivot end located in one of the two lugs, and the first fixing hole and the second fixing hole located in the other of the two lugs.

14. The optical assembly as described in claim 8, characterized in that, Also includes: A lens mount that supports the lens unit, wherein the annular side surface of the pressure ring includes a top edge away from the lens mount, and the focusing fixture includes at least one stop portion, wherein when the focusing fixture is disposed on the pressure ring, the at least one stop portion is located on the top edge of the pressure ring.

15. The optical assembly as described in claim 8, characterized in that, Also includes: A lens mount that supports the lens unit, wherein the annular side surface of the pressure ring includes a bottom edge near the lens mount, and each of the grooves is recessed within the bottom edge of the annular side surface. When the focusing fixture is disposed on the pressure ring, each of the engaging members faces the corresponding limiting top wall.

16. The optical assembly as described in claim 8, characterized in that, The annular side surface includes a first portion and a second portion, the height of the first portion being greater than the height of the second portion, and the first portion being farther away from the lens mount that supports the lens unit relative to the second portion.

17. The optical assembly as described in claim 16, characterized in that, The lens unit includes a first region and a second region, the first region protruding radially from the second region, and the height of the first portion of the pressure ring is greater than the height of the first region of the lens unit.

18. The optical assembly as described in claim 16, characterized in that, There is a gap between the second part of the pressure ring and the lens unit.

19. The optical assembly as described in claim 8, characterized in that, The annular side surface of the pressure ring has a top edge, the top edge having a portion extending toward the axis of the pressure ring and extending above the lens unit.

Images