Optical zoom module and head-mounted electronic device

Abstract

The invention provides an optical zoom module and a head-mounted electronic device, and the optical zoom module comprises a first lens barrel which comprises a straight groove and a bump; the second lens cone is arranged in the first lens cone and comprises a convex rib; one end of the elastic element is fixed on one side, close to the eye side, of the second lens cone, and the other end of the elastic element abuts against the first lens cone; the operating ring is arranged outside the first lens cone and comprises an inclined block, the inclined block is provided with an inclined side edge, the inclined side edge and the straight groove are arranged in a stacked mode in the radial direction, and the protruding rib penetrates through the straight groove and makes contact with the inclined side edge; when the operation ring is rotated, the inclined side edge of the inclined block or the elastic element enables the convex rib of the second lens barrel to move along the corresponding straight groove and the inclined side edge. According to the optical zoom module, only one inclined side edge needs to be machined on the inclined block of the operation ring, and the imaging position of the optical zoom module can be adjusted.

Description

Technical Field

[0001] The invention relates to an optical zoom module, and in particular to a head-mounted electronic device including the optical zoom module. Background Art

[0002] Virtual Reality (VR) is a computer simulation system that can create and experience a virtual world. It can use computers to generate an interactive analog environment that integrates multiple sources of information, allowing users to immerse themselves in the environment. With the continuous development of technology, VR is increasingly being used in industries and fields including medicine, entertainment, industrial simulation, aerospace, education, etc.

[0003] As one of the important components of VR technology, head mounted devices (HMD) are gradually becoming popular in life. HMD can expand the level of scientific three-dimensional visualization and enhance the user-computer interaction performance. With the application of VR technology in many fields, HMD has also received more and more attention.

[0004] Currently, head-mounted electronic devices can be used with glasses or without glasses, so the design of the head-mounted electronic device will consider reserving space for glasses. However, if a myopic user wears glasses and then uses the head-mounted electronic device, it may still compress the user's glasses and cause discomfort, or damage the glasses. If a myopic user chooses not to wear glasses and directly uses the head-mounted electronic device, the user will not be able to see the image clearly, or will feel uncomfortable due to focal length problems, which will make the user resist the head-mounted electronic device.

[0005] Therefore, there is a need to provide an optical zoom module and a head-mounted electronic device that can solve the aforementioned problems. Summary of the invention

[0006] An object of the present invention is to provide an optical zoom module, wherein the oblique block of the operating ring only needs to be processed with one oblique side edge; furthermore, the oblique side edge or elastic element of the oblique block can move the second lens unit arranged in the second lens barrel, so that the imaging position of the optical zoom module can be adjusted.

[0007] According to the above-mentioned purpose, the present invention provides an optical zoom module, which has a central axis and a radial direction perpendicular to the central axis, and comprises: a first lens barrel, surrounding the central axis, and comprising a first barrel body and a straight groove, wherein the straight groove penetrates the first barrel body; a second lens barrel, surrounding the central axis, disposed in the first lens barrel, and comprising a second barrel body and a convex rib, wherein the convex rib is located on an outer annular surface of the second barrel body; an elastic element, one end of which is fixed to a side of the second lens barrel close to the eye side, and the convex rib ... The other end abuts against the first lens barrel; and an operating ring, which surrounds the central axis, is arranged outside the first lens barrel and includes a ring body and an inclined block, wherein the inclined block is located on an inner ring surface of the ring body, the inclined block has an inclined side edge, the inclined side edge and the straight groove are stacked along the radial direction, and the convex rib passes through the straight groove and contacts the inclined side edge; wherein when the operating ring is rotated, the inclined side edge of the inclined block or the elastic element causes the convex rib of the second lens barrel to move along the corresponding straight groove and the inclined side edge. The present invention provides an optical zoom module, wherein the first lens barrel further includes a protrusion, and the protrusion is located on an outer ring surface of the first barrel body; the operating ring further includes at least one limiting sliding groove, the limiting sliding groove is located on an inner ring surface of the ring body, and the protrusion is located in the limiting sliding groove; and when the oblique side edge of the oblique block or the elastic element causes the convex rib of the second lens barrel to move along the corresponding straight groove and the oblique side edge, the limiting sliding groove also moves relative to the protrusion. The present invention provides an optical zoom module, wherein the oblique block of the operating ring is convexly arranged on the inner ring surface and has a lateral side adjacent to the convex block of the first lens barrel, the lateral side is used as an inner wall of the limiting sliding groove, and any tangent line in the arc-shaped extension direction of the limiting sliding groove is perpendicular to the central axis. The present invention provides an optical zoom module, wherein the straight groove is parallel to the central axis and includes a first straight position and a second straight position opposite to each other, the first straight position is adjacent to an image source side, the limiting sliding groove includes a first tail end and a second tail end opposite to each other, the first tail end is adjacent to the convex rib, when the operating ring is rotated along a rotation direction, a force of the oblique side edge causes the convex rib of the second lens barrel to move from the first straight position to the second straight position along the corresponding straight groove and the oblique side edge, and At the same time, the limiting groove also moves relative to the protrusion so that the protrusion changes from a position adjacent to the first tail end to a position adjacent to the second tail end; and, when the operating ring is rotated along another rotational direction, a force of the elastic element causes the convex rib of the second lens barrel to move from the second straight position to the first straight position along the corresponding straight groove and the oblique side edge, and at the same time, the limiting groove also moves relative to the protrusion so that the protrusion changes from a position adjacent to the second tail end side to a position adjacent to the first tail end side. The optical zoom module provided by the present invention further comprises: a first lens unit disposed in the first lens barrel; and a second lens unit disposed in the second lens barrel. The optical zoom module provided by the present invention further includes an image source, which is arranged on a side of the first lens barrel adjacent to the image source, wherein the second lens unit arranged in the second lens barrel is moved from the first straight position to the second straight position, thereby adjusting the distance between the second lens unit and the image source. The present invention provides an optical zoom module, wherein the number of the ribs, the number of the straight grooves and the number of the oblique blocks are three respectively, and the number of the position-limiting sliding grooves and the number of the protrusions are three respectively. The present invention provides an optical zoom module. When the operating ring rotates and the protrusion changes from contacting the first end of the limiting sliding groove to contacting the second end, the operating ring rotates around the central axis to a maximum angle between 60 and 120 degrees.

[0008] The present invention further provides a head-mounted electronic device, comprising: a housing; the optical zoom module disposed in the housing; and a control unit disposed in the housing.

[0009] According to the optical zoom module of the present invention, the oblique block of the operating ring only needs to process one oblique side edge, which can reduce the number of corrections of the side edge of the oblique block, reduce the manufacturing mold processing cost and do not affect the overall curvature adjustment function. Furthermore, when the operating ring is rotated, the oblique side edge of the oblique block or the elastic element can move the rib of the second lens barrel along the corresponding straight groove and the oblique side edge, and can also move the second lens unit disposed in the second lens barrel parallel to the central axis direction, so that the imaging position of the optical zoom module can be adjusted, and the user can easily adjust the focal length of the optical zoom module. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 FIG. 4 is an exploded perspective schematic diagram of an optical zoom module according to an embodiment of the present invention.

[0011] Figure 2 The figure is a schematic cross-sectional view of an optical zoom module according to an embodiment of the present invention, showing that the second lens unit disposed in the second lens barrel moves from a first straight position to a second straight position.

[0012] Figure 3a It is a schematic side view of an assembly of an optical zoom module according to an embodiment of the present invention, showing that the convex rib of the second lens barrel moves from a first vertical position to a second vertical position.

[0013] Figure 3bIt is a schematic side view of an assembly of an optical zoom module according to another embodiment of the present invention, showing that the convex rib of the second lens barrel moves from a first vertical position to a second vertical position.

[0014] Figure 4 The figure is a schematic three-dimensional assembly diagram of a first lens barrel, a second lens barrel and an operating ring of an optical zoom module according to an embodiment of the present invention.

[0015] Figure 5 FIG. 1 is a partial three-dimensional schematic diagram of an operating ring of an optical zoom module according to an embodiment of the present invention.

[0016] Figure 6 FIG. 4 is a schematic three-dimensional diagram of a first lens barrel of an optical zoom module according to an embodiment of the present invention.

[0017] Figure 7 FIG. 4 is a three-dimensional schematic diagram of a head-mounted electronic device according to an embodiment of the present invention.

[0018] Explanation of symbols in the figure: 1 optical zoom module; 10a central axis; 10b radial direction; 11 second lens barrel; 110 second barrel body; 111 convex rib; 112 outer annular surface; 12 first lens barrel; 121 vertical groove; 122 first barrel; 123 convex block; 124 outer annular surface; 13 operating ring; 131 oblique block; 1310 extension direction; 1310' extension direction; 1311 oblique side edge; 1312 transverse side edge; 132 limiting sliding groove; 1320 inner wall of the sliding groove; 1321 first tail end; 1322 second tail end; 133 inner annular surface; 134 annular body; 14 second lens unit; 141 optical lens; 15 first lens unit; 151 optical lens; 16 damping oil; 17 indicator cover; 181 image source; 19 elastic element; 191 end; 192 end; 2 head mounted electronic device 20 housing; 22 control unit; E1 left eye; E2 right eye; P1 is the first vertical position; P2 is the second vertical position; S1 is the eye side, S2 is the image source side. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and characteristics of the present invention more clearly understood, the relevant embodiments of the present invention are described in detail as follows with reference to the drawings.

[0020] Figure 1 FIG. 4 is an exploded perspective schematic diagram of an optical zoom module according to an embodiment of the present invention. Figure 2 The figure is a schematic cross-sectional view of an optical zoom module according to an embodiment of the present invention, showing that the second lens unit disposed in the second lens barrel moves from a first straight position to a second straight position. Figure 3aFIG. 1 is a schematic side view of an optical zoom module according to an embodiment of the present invention, showing that the rib of the second lens barrel moves from a first vertical position to a second vertical position. Figure 1 , Figure 2 and Figure 3a The optical zoom module 1 has a central axis 10a, an eye side S1 and an image source side S2, and includes: a first lens barrel 12, a first lens unit 15, a second lens barrel 11, a second lens unit 14, an elastic element 19 and an operating ring 13.

[0021] The first lens barrel 12 (which may be referred to as a fixed barrel) surrounds the central axis 10a and includes a first barrel body 122, a straight groove 121 and a protrusion 123 (protrusion). The straight direction of the straight groove 121 refers to the direction in which the groove extends parallel to the central axis 10a. The first lens barrel 12 may be made of plastic material. The straight groove 121 is parallel to the central axis 10a and passes through the first barrel body 122, and the protrusion 123 (which may be referred to as a stop protrusion) is located on the outer annular surface 124 of the first barrel body 122. The first lens unit 15 is disposed in the first lens barrel 12. The first lens unit 15 includes an optical lens 151. In the present embodiment, the total number of optical lenses 151 is 1, but it is not limited thereto, and the optical lens 151 may be made of plastic or glass material.

[0022] The second lens barrel 11 (which may be called a straight-in barrel) surrounds the central axis 10a and is disposed in the first lens barrel 12. The second lens barrel 11 includes a second barrel body 110 and a rib 111. The rib 111 is located on the outer annular surface 112 of the second barrel body 110. The second lens barrel 11 may be made of plastic material. The second lens unit 14 is disposed in the second lens barrel 11. The second lens unit 14 includes an optical lens 141. In the present embodiment, the total number of the optical lens 141 is 1, but it is not limited thereto, and the optical lens 141 may be made of plastic or glass material.

[0023] The elastic element 19 surrounds the central axis 10a and is disposed between the first lens barrel 12 and the second lens barrel 11 in the direction of the central axis 10a, wherein one end 191 of the elastic element 19 in the direction of the central axis 10a abuts against a side of the first lens barrel 12 close to the eye side S1, and the other end 192 of the elastic element 19 in the direction of the central axis 10a abuts against the second lens barrel 11. In the present embodiment, the elastic element 19 is disposed in the first lens barrel 12, and the elastic element 19 can be a helical spring.

[0024] Figure 4 This is a schematic diagram of a combination of a first lens barrel, a second lens barrel and an operating ring of an optical zoom module according to an embodiment of the present invention. Figure 1 , Figure 2 , Figure 3a and Figure 4 , the operating ring 13 surrounds the central axis 10a, is arranged outside the first lens barrel 12, and includes a ring body 134, an inclined block 131 and a limiting groove 132. The operating ring 13 can be made of plastic material. The inclined block 131 and the limiting groove 132 are both located on the inner ring surface 133 of the ring body 134. The limiting groove 132 does not penetrate the ring body 134, but is not limited to this. The inclined block 131 has an inclined side edge 1311, which is inclined to the central axis 10a. The inclination of the inclined side edge 1311 refers to the direction in which the side extends along the inner ring surface 133 with a specific slope. In this embodiment, the extension direction 1310 of the inclined side edge 1311 is counterclockwise (viewed from the eye side S1 direction). The limiting sliding groove 132 includes a first tail end 1321 and a second tail end 1322 opposite to each other, wherein the first tail end 1321 may be adjacent to the convex rib 111. The oblique side edge 1311 of the oblique block 131 and the straight groove 121 of the first lens barrel 12 are stacked along the radial direction 10b (the radial direction 10b is perpendicular to the central axis 10a). The convex rib 111 passes through the straight groove 121 and contacts the oblique side edge 1311, and the convex block 123 is located in the limiting sliding groove 132.

[0025] Figure 5 This is a partial three-dimensional schematic diagram of an operating ring of an optical zoom module according to an embodiment of the present invention. Figure 5 and Figure 1 In another embodiment, the inclined block 131 of the operating ring 13 is protruded from the inner ring surface 133 and may have a lateral side 1312 adjacent to the protrusion 123 of the first lens barrel 12. The lateral side 1312 may be used as an inner wall 1320 of the limiting sliding groove 132, and any tangent line in the arc-shaped extension direction of the limiting sliding groove 132 is perpendicular to the central axis 10a.

[0026] According to the optical zoom module 1 of the present invention, the oblique block 131 of the operating ring 13 only needs to process one oblique side 1311, which can reduce the number of corrections of the side of the oblique block 131, reduce the manufacturing mold processing cost and do not affect the overall curvature adjustment function. Furthermore, when the operating ring 13 is rotated, the oblique side 1311 of the oblique block 131 or the elastic element 19 can move the rib 111 of the second lens barrel 11 along the corresponding straight groove 121 and the oblique side 1311, and can also move the second lens unit 14 disposed in the second lens barrel 11 parallel to the central axis 10a, so that the imaging position of the optical zoom module 1 can be adjusted, and the user can easily adjust the focal length of the optical zoom module 1. In addition, when the operating ring 13 is rotated to move the second lens unit 14 (i.e., when adjusting the imaging position of the optical zoom module 1), the limiting sliding groove 132 is also limited by the protrusion 123 and moves within a limited range, so that the operating ring 13 can be limited to rotate within a limited range, thereby limiting the limited range of movement of the rib 111 in the straight groove 121 and on the oblique side 1311, thereby preventing the rib 111 from accidentally escaping from the straight groove 121 and the oblique side 1311, or preventing the rib 111 from hitting the rear end of the straight groove 121. During assembly, the operating ring 13 is positioned via the protrusion 123, and the rib 111 of the second lens barrel 11 is accurately set in the straight groove 121 and on the oblique side 1311, thereby preventing the user from feeling uncomfortable when rotating the operating ring 13, thereby improving the assembly accuracy of the optical zoom module 1.

[0027] For more details, please refer to Figure 2 and Figure 3aThe straight groove 121 of the first lens barrel 12 is parallel to the central axis 10a, and includes a first straight position P1 and a second straight position P2 opposite to each other, wherein the first straight position P1 is adjacent to the image source side S2, and the second straight position P2 is adjacent to the eye side S1. When the operating ring 13 is rotated along a rotation direction (for example, the rotation direction is counterclockwise when viewed from the eye side S1), a force (for example, a resisting force) of the oblique side edge 1311 can cause the convex rib 111 of the second lens barrel 11 to move from the first straight position P1 to the second straight position P2 along the corresponding straight groove 121 and the oblique side edge 1311, and at the same time, the limiting sliding groove 132 also moves relative to the protrusion 123 so that the protrusion 123 changes from a position adjacent to the first tail end 1321 to a position adjacent to the second tail end 1322, so as to adjust the imaging position of the optical zoom module 1 to the first imaging position. When the operating ring 13 is rotated along another rotation direction (for example, the other rotation direction is clockwise when viewed from the eye side S1), a force (for example, elastic force) of the elastic element 19 can cause the convex rib 111 of the second lens barrel 11 to move from the second straight position P2 to the first straight position P1 along the corresponding straight groove 121 and the oblique side 1311, and at the same time, the limiting sliding groove 132 also moves relative to the protrusion 123 so that the protrusion 123 changes from a position adjacent to the second tail end 1322 to a position adjacent to the first tail end 1321, so as to adjust the imaging position of the optical zoom module 1 to the second imaging position.

[0028] Please refer to Figure 3b On the contrary, in another embodiment, the extension direction 1310' of the oblique side 1311 of the operating ring 13 is clockwise (as viewed from the eye side S1). When the operating ring 13 is rotated along a rotation direction (for example, as viewed from the eye side S1, the rotation direction is clockwise), a force (for example, a resistance force) of the oblique side 1311 can cause the convex rib 111 of the second lens barrel 11 to move along the corresponding vertical groove 121 and the oblique side 1311 from the first vertical position P1 to the second vertical position P2, and at the same time, the limiting sliding groove 132 also moves relative to the protrusion 123 so that the protrusion 123 changes from a position adjacent to the first tail end 1321 to a position adjacent to the second tail end 1322. When the operating ring 13 is rotated along another rotation direction (for example, the other rotation direction is counterclockwise when viewed from the eye side S1), a force (for example, elastic force) of the elastic element 19 can cause the convex rib 111 of the second lens barrel 11 to move from the second straight position P2 to the first straight position P1 along the corresponding straight groove 121 and the oblique side 1311, and at the same time, the limiting sliding groove 132 also moves relative to the protrusion 123 so that the protrusion 123 changes from a position adjacent to the second tail end 1322 to a position adjacent to the first tail end 1321.

[0029] Figure 6 FIG. 1 is a perspective diagram of a first lens barrel of an optical zoom module according to an embodiment of the present invention. Figure 3a , Figure 5 and Figure 6 When the operating ring 13 rotates and the protrusion 123 contacts the first tail end 1321 of the limiting sliding groove 132 to the second tail end 1322, the operating ring 13 rotates around the central axis 10a to a maximum angle, and the maximum angle can be between 60 and 120 degrees depending on the zoom and the size requirements of the optical zoom module. For example, when the maximum rotation angle of the optical zoom module is designed to be 60 degrees, and the operating ring 13 rotates 60 degrees from the initial position, the rib 111 of the second lens barrel 11 can be moved from the first straight position P1 to the second straight position P2; for another example, when the maximum rotation angle of the optical zoom module is designed to be 120 degrees, and the operating ring 13 rotates 120 degrees from the initial position, the rib 111 of the second lens barrel 11 can be moved from the first straight position P1 to the second straight position P2.

[0030] Please refer to Figure 1 and Figure 3a In this embodiment, the number of the ribs 111, the number of the straight grooves 121, and the number of the oblique blocks 131 are three respectively. Since the number of the ribs 111, the number of the straight grooves 121, and the number of the oblique blocks 131 are three respectively, each of the ribs 111 can move more smoothly along the corresponding straight grooves 121 and the oblique side edges 1311 of each oblique block 131. The number of the limiting sliding grooves 132 and the number of the protrusions 123 are three respectively. Since the number of the limiting sliding grooves 132 and the number of the protrusions 123 are three respectively, each of the limiting sliding grooves 132 can move more smoothly relative to each of the protrusions 123.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3a The optical zoom module 1 further includes an image source 181 (such as a liquid crystal display, LCD, but not limited thereto), and the image source 181 is disposed on a side of the first lens barrel 12 adjacent to the image source side S2. When the operating ring 13 is rotated, the oblique side edge 1311 of the oblique block 131 or the elastic element 19 moves the rib 111 of the second lens barrel 11 along the corresponding straight groove 121 and the oblique side edge 1311, so that the second lens unit 14 disposed in the second lens barrel 11 moves, thereby adjusting the distance between the second lens unit 14 and the image source 181, that is, adjusting the imaging position of the optical zoom module 1.

[0032] Please refer to Figure 2 and Figure 3a The present invention can utilize the damping oil 16 provided between the first lens barrel 12 and the operating ring to produce a damping effect on the operating ring 13, so that the optical zoom module 1 has operational stability; and damping oil is provided between the convex rib 111 of the second lens barrel 11 and the straight groove 121 of the first lens barrel 12, so that the second lens barrel 11 has movement stability.

[0033] Please refer to Figure 1 and Figure 2 The optical zoom module 1 further includes an indicator cover 17, which is disposed on a side of the first lens barrel 12 close to the eye side S1 and can display the rotation scale of the operation ring 13, that is, multiple vertical positions of the first lens unit 14 (for example Figure 2 The first vertical position P1 and the second vertical position P2 of the first lens unit are shown, but not limited thereto), so that the myopic user can quickly operate and use multiple imaging positions to compensate for the degree of myopia.

[0034] Figure 7 1 is a three-dimensional schematic diagram of a head-mounted electronic device according to an embodiment of the present invention. The head-mounted electronic device 2 includes a housing 20, the optical zoom module 1 and a control unit 22. The optical zoom module 1 is disposed in the housing 20. The control unit 22 is disposed in the housing 20 and is electrically connected to the optical zoom module 1. The control unit 22 may be a general-purpose processor, a microprocessor (MCU), an application processor (AP), a digital signal processor (DSP), a graphics processor (GPU), or a holographic processor (HPU), or any combination of the above processors, which may include various circuit logics for: providing data and image processing and calculation functions, transmitting frame data (such as data representing text information, graphics, or images) to the image source (such as a display) of the optical zoom module 1. The head-mounted electronic device 2 includes two optical zoom modules 1, which correspond to the left eye E1 and the right eye E2 respectively, so that the imaging position of the image source for the left eye E1 or the right eye E2 can be independently adjusted, that is, the appropriate myopia degree can be independently compensated for the left eye E1 or the right eye E2.

[0035] The optical zoom module 1 provided by the present invention can be applied to a zoom optical system according to visual requirements, and can be widely used in electronic imaging systems such as 3D (three-dimensional) image acquisition, wearable displays of virtual reality (VR) or augmented reality (AR), game consoles, monitor cameras, digital cameras, mobile devices, digital tablets, home electronic devices or car photography.

[0036] In summary, the present invention only records the preferred implementation methods or embodiments of the technical means used to solve the problem, and is not intended to limit the scope of the patent implementation of the present invention. That is, all equivalent changes and modifications that are consistent with the scope of the patent application of the present invention or made according to the scope of the patent application of the present invention are covered by the patent scope of the present invention.

Claims

1. An optical zoom module having a central axis and a radial direction perpendicular to the central axis, characterized in that: Also includes: A first lens barrel surrounds the central axis and includes a first barrel body and a straight groove, wherein the straight groove is parallel to the central axis and passes through the first barrel body; A second lens barrel, surrounding the central axis, is disposed in the first lens barrel and includes a second barrel body and a convex rib, wherein the convex rib is located on an outer annular surface of the second barrel body; an elastic element surrounding the central axis and disposed between the first lens barrel and the second lens barrel in the direction of the central axis, wherein one end of the elastic element in the direction of the central axis abuts against a side of the first lens barrel close to the eye side, and the other end of the elastic element in the direction of the central axis abuts against the second lens barrel; and An operating ring surrounds the central axis, is disposed outside the first lens barrel, and includes a ring body and an inclined block, wherein the inclined block is located on an inner ring surface of the ring body, the inclined block has an inclined side edge, the inclined side edge is inclined to the central axis, the inclined side edge and the straight groove are stacked along the radial direction, and the rib passes through the straight groove and contacts the inclined side edge; When the operating ring is rotated, the oblique side edge of the oblique block or the elastic element causes the convex rib of the second lens barrel to move along the corresponding straight groove and the oblique side edge.

2. The optical zoom module according to claim 1, wherein: The first lens barrel further comprises a protrusion, and the protrusion is located on an outer annular surface of the first barrel; The operating ring further comprises at least one limiting sliding groove, the limiting sliding groove is located on an inner ring surface of the ring body, and the protrusion is located in the limiting sliding groove; and When the oblique side edge of the oblique block or the elastic element causes the convex rib of the second lens barrel to move along the corresponding straight groove and the oblique side edge, the limiting sliding groove also moves relative to the convex block.

3. The optical zoom module according to claim 2, wherein: The oblique block of the operating ring is convexly arranged on the inner ring surface and has a lateral side adjacent to the convex block of the first lens barrel. The lateral side is used as an inner wall of the limiting sliding groove, and any tangent line of the arc-shaped extending direction of the limiting sliding groove is perpendicular to the central axis.

4. The optical zoom module according to claim 2, wherein: The straight groove is parallel to the central axis and includes a first straight position and a second straight position relative to each other, the first straight position is adjacent to an image source side, the limiting sliding groove includes a first tail end and a second tail end relative to each other, the first tail end is adjacent to the convex rib, when the operating ring is rotated along a rotation direction, a force of the oblique side edge causes the convex rib of the second lens barrel to move from the first straight position to the second straight position along the corresponding straight groove and the oblique side edge, and at the same time, the limiting sliding groove also moves relative to the protrusion so that the protrusion changes from a position adjacent to the first tail end to a position adjacent to the second tail end; and when the operating ring is rotated along another rotation direction, a force of the elastic element causes the convex rib of the second lens barrel to move from the second straight position to the first straight position along the corresponding straight groove and the oblique side edge, and at the same time, the limiting sliding groove also moves relative to the protrusion so that the protrusion changes from a position adjacent to the second tail end side to a position adjacent to the first tail end side.

5. The optical zoom module according to claim 4, wherein: Further including: A first lens unit is disposed in the first lens barrel; And, a second lens unit is disposed in the second lens barrel.

6. The optical zoom module according to claim 5, wherein: It further comprises an image source, which is arranged on a side of the first lens barrel adjacent to the image source, wherein the second lens unit arranged in the second lens barrel is moved from the first straight position to the second straight position, thereby adjusting the distance between the second lens unit and the image source.

7. The optical zoom module according to claim 2, wherein: The number of the ribs, the number of the straight grooves and the number of the oblique blocks are three respectively, and the number of the limiting sliding grooves and the number of the protrusions are three respectively.

8. The optical zoom module according to claim 4, wherein: When the operating ring rotates and the protrusion changes from contacting the first tail end of the limiting sliding groove to contacting the second tail end, the operating ring rotates around the central axis at a maximum angle, and the maximum rotation angle is between 60 and 120 degrees.

9. The optical zoom module according to claim 1, wherein: The limiting sliding groove does not penetrate the ring body.

10. A head-mounted electronic device, characterized in that: include: a housing; The optical zoom module according to any one of claims 1 to 9, disposed in the housing; as well as A control unit is disposed in the housing and electrically connected to the optical zoom module.

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