Two-axis prism motor rotating mechanism and periscopic camera module thereof

Abstract

The utility model relates to a two-axis prism motor rotating mechanism and a periscopic camera module thereof. The two-axis prism motor rotating mechanism comprises a prism module movably arranged in a base, the prism module comprises a prism; the prism is fixedly arranged on the first prism bracket; a second prism bracket is arranged below the first prism bracket; the first prism bracket drives the prism to rotate around a first shaft; the second prism bracket drives the first prism bracket to rotate around a second shaft; the first shaft is perpendicular to the second shaft; the second axis is parallel to the optical axis direction; the base is internally provided with a first driving assembly which is located on the side of the first prism support to drive the first prism support to rotate around a first shaft and a second driving assembly which is located below the second prism support to drive the second prism support to rotate around a second shaft. And a rotary guide mechanism is arranged between the second prism bracket and the base. According to the utility model, the rotation direction of the prism module is set on the first shaft and the second shaft by using the rotation guide mechanism and the rotation shaft, so that the optical imaging quality can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of optical imaging, in particular to a two-axis prism motor rotating mechanism and a periscope camera module thereof. Background Art

[0002] The periscope lens structure usually includes two parts, namely the lens part and the prism part, wherein the prism part is arranged at the front end of the periscope part, and the imaging chip is arranged at the rear end of the lens part, and the light is reflected by the prism part and enters the lens part.

[0003] The camera functions of existing electronic devices are becoming more and more powerful. Conventional camera lenses can only capture close-up images (1 to 2 meters). If you want to capture distant scenes (10 to 20 meters) clearly, the lens must have telephoto or zoom functions. However, such lenses often require a long stroke to achieve zooming, resulting in a relatively long total lens length. The lens height exceeds the thickness of the electronic device, making it difficult to meet the requirements of lightweight or thin mobile terminal devices. In this regard, the following methods are usually used: Figure 1 The periscope design shown is to design the optical path to lie flat, and add a prism to rotate the optical path 90 degrees. At this time, the prism bracket on the mechanism needs to be fine-tuned at small angles of θx and θy to perform OIS hand shake compensation, so that the entire optical system can lie flat to reduce the overall height, and cooperate with the focus motor to complete the focus or zoom in the Z-axis direction.

[0004] However, the traditional periscope optical system will produce eccentricity in the zero field of view spot position during the anti-shake process, resulting in a decrease in resolution. In 2020, Huawei proposed a new optical system (CN115917401A) from θy to θz, such as Figure 2 , which can effectively improve the quality of optical imaging, and the design of the optical machine also needs to be changed accordingly. Utility Model Content

[0005] In order to solve the above problems in the prior art, the utility model provides a two-axis prism motor rotation mechanism and a periscope camera module thereof.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] A two-axis prism motor rotation mechanism comprises a prism module movably arranged in a base; the prism module comprises a prism; the prism is fixedly arranged on a first prism bracket; a second prism bracket is arranged below the first prism bracket; the first prism bracket drives the prism to rotate around a first axis; the second prism bracket drives the first prism bracket to rotate around a second axis; the first axis is perpendicular to the second axis; the second axis is parallel to the optical axis direction; a first driving component is arranged in the base and is located on the side of the first prism bracket to drive the first prism bracket to rotate around the first axis, and a second driving component is located below the second prism bracket to drive the second prism bracket to rotate around the second axis; a rotation guide mechanism is arranged between the second prism bracket and the base.

[0008] Furthermore, the first prism bracket rotates around the first axis through a plurality of rotation axes.

[0009] Furthermore, the first prism bracket rotates around a first axis through a rotating shaft; a accommodating groove with an opening facing downward is provided at the bottom of the first prism bracket; the top of the accommodating groove abuts on the rotating shaft; a supporting groove with an opening facing upward is provided at the top of the second prism bracket; the rotating shaft abuts on the bottom of the supporting groove to support the rotating shaft.

[0010] Furthermore, the first driving assembly includes a second magnet disposed on two opposite side surfaces of the first prism bracket along the first axis direction and a second coil disposed on the inner side of the base opposite to the second magnet.

[0011] Furthermore, the second driving assembly includes a first magnet disposed at the bottom of the second prism bracket and a first coil disposed on the inner side of the base relative to the first magnet.

[0012] Furthermore, the rotation guide mechanism includes a ball groove provided on the second prism bracket; the ball groove is in an arc shape, the center of the arc passes through the second axis; and a ball is fitted between the ball groove and the inner side of the base.

[0013] Furthermore, the inner side of the ball groove is magnetically matched with the base through a magnetic attraction component; another magnetic attraction component is provided between the first prism bracket and the second prism bracket.

[0014] Furthermore, the magnetic attraction component includes an adsorption magnet provided on the inner side of the ball groove and an adsorption magnet sheet provided on the inner side of the base relative to the adsorption magnet.

[0015] The periscope camera module comprises the above-mentioned two-axis prism motor rotation mechanism and a lens module arranged on one side of the prism module.

[0016] Furthermore, the lens module can move along the optical axis in the base; the top of the base is matched with a top cover; the top cover is provided with a light inlet hole; the light inlet hole is arranged opposite to the prism.

[0017] The beneficial effects of the utility model are as follows: the rotation direction of the prism module is set on the first axis and the second axis by utilizing the rotation guide mechanism and the rotation axis, which can effectively improve the optical imaging quality; at the same time, the rotation guide mechanism has good guidance for the rotation direction of the second prism bracket, and can ensure that its rotation direction does not deviate from the second axis; through the action of the first prism bracket and the second prism bracket, the rotation of the prism at θx and θz can be adjusted respectively to perform OIS hand shake compensation, and the structure is simple and the reliability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the optical path of a prism module in the prior art;

[0020] Figure 2 It is a schematic diagram of the improved optical path of the prism module;

[0021] Figure 3 It is an exploded diagram of the rotating mechanism of the utility model;

[0022] Figure 4 The utility model is a rotating mechanism explosion Figure 2 ;

[0023] Figure 5 This is an exploded view of the periscope camera module of the utility model;

[0024] Figure 6 It is a cross-sectional schematic diagram of the prism module of the utility model;

[0025] Description of reference numerals:

[0026] 100, base; 101, accommodating space; 110, top cover; 111, light inlet; 200, prism module; 210, prism; 220, first prism bracket; 221, first axis; 222, rotating axis; 223, accommodating groove; 230, second prism bracket; 231, second axis; 232, supporting groove; 240, first driving component; 241, second magnet; 242, second coil; 250, second driving component; 251, first magnet; 252, first coil; 260, rotating guide mechanism; 261, ball groove; 262, ball; 263, magnetic suction component; 2631, adsorption magnet; 2632, magnetic suction sheet; 300, lens module. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example:

[0031] like Figure 3-4As shown, the two-axis prism 210 motor rotation mechanism includes a prism module 200 movably arranged in the base 100; the prism module 200 includes a prism 210; the prism 210 is fixedly arranged on a first prism bracket 220; a second prism bracket 230 is arranged below the first prism bracket 220; the first prism bracket 220 drives the prism 210 to rotate around a first axis 221; the second prism bracket 230 drives the first prism bracket 220 to rotate around a second axis 231; the first axis 221 is perpendicular to the second axis 231; the second axis 231 is parallel to the optical axis direction The base 100 is provided with a first driving assembly 240 located at the side of the first prism bracket 220 to drive the first prism bracket 220 to rotate around the first axis 221, and a second driving assembly 250 located below the second prism bracket 230 to drive the second prism bracket 230 to rotate around the second axis 231; a rotation guide mechanism 260 is provided between the second prism bracket 230 and the base 100; the first axis 221 is parallel to the X-axis direction, and the second axis 231 is parallel to the Z-axis direction, so that the prism 210 can be rotated by θx and θz respectively to achieve OIS hand shake compensation;

[0032] The optical axis direction refers to the transmission direction of the light in the base 100 after entering the base 100 through the prism module 200, and is also the moving direction of the lens module 300;

[0033] In one embodiment, the first prism bracket 220 rotates around the first axis 221 through a plurality of rotating shafts 222; the central axis of the rotating shaft 222 coincides with the first axis 221; in one embodiment, one rotating shaft 222 is provided; a receiving groove 223 with an opening facing downward is provided below the first prism bracket 220; the rotating shaft 222 is arranged in the receiving groove 223 and abuts against the top of the receiving groove 223; in this case, the rotating shaft 222 is preferably arranged to penetrate the first prism bracket 220, so as to provide a relatively stable support for the rotation of the first prism bracket 220 and provide more contact surfaces to reduce the shaking of the first prism bracket 220 when rotating; the second A supporting groove 232 with an upward opening is provided above the prism bracket 230; the rotating shaft 222 abuts against the bottom of the supporting groove 232 to support the rotating shaft 222; the supporting groove 232 is provided on the outside of the receiving groove 223, and the rotating shaft 222 cooperates with the supporting groove 232 after extending from the receiving groove 223, that is, the first prism bracket 220 is connected to the second prism bracket 230 as a whole through the rotating shaft 222; the second prism bracket 230 may also be provided with a corresponding abutting end face, so as to reduce the displacement of the first prism bracket 220 on the second prism bracket 230 in other directions, and mainly retain the freedom of the first prism bracket 220 to rotate around the rotating shaft 222;

[0034] In one embodiment, two rotating shafts 222 may be provided, which are respectively provided on both sides of the first prism bracket 220 for connecting with the second prism bracket 230, so that the first prism bracket 220 can be rotatably connected to the second prism bracket 230, so that the first prism bracket 220 rotates around the first shaft 221. However, compared with the previous embodiment, the installation process using two rotating shafts 222 is more difficult, and it is necessary to pay attention to maintaining the coaxiality of the two rotating shafts 222 to better ensure the adjustment accuracy.

[0035] In one embodiment, the first driving component 240 includes a second magnet 241 disposed on two opposite side surfaces of the first prism bracket 220 along the direction of the first axis 221 and a second coil 242 disposed on the inner side of the base 100 relative to the second magnet 241; the second magnet 241 cooperates with the second coil 242 to control the rotation angle of the first prism bracket 220 after the second coil 242 is energized; a Hall sensor is disposed inside the second coil 242 for detecting the rotation position of the first prism bracket 220;

[0036] In one embodiment, the second driving component 250 includes a first magnet 251 disposed at the bottom of the second prism bracket 230 and a first coil 252 disposed on the inner side of the base 100 relative to the first magnet 251; the first magnet 251 cooperates with the first coil 252 to control the rotation angle of the first prism bracket 220 after the first magnet 251 is energized; a Hall sensor is disposed on the inner side of the first coil 252 for detecting the rotation position of the second prism bracket 230;

[0037] In one embodiment, the rotation guide mechanism 260 includes a ball groove 261 provided on the second prism bracket 230; the ball groove 261 is arc-shaped, and the center of the arc passes through the second shaft 231; a ball 262 is matched between the ball groove 261 and the inner side of the base 100; the ball 262 is preferably provided in plurality to improve the stability during rotation; in one embodiment; three balls 262 are provided, and a limiting groove matching the ball 262 is provided on the inner side of the base 100, which can be seen in FIG. Figure 3 In the embodiment, the ball 262 is partially embedded in the inner side of the base 100, and the inner side thereof is a limiting groove, which can limit the position of the ball 262. When the second prism bracket 230 rotates, the ball 262 rolls and / or slides in the ball groove 261, and the ball groove 261 can be set to a circular ring or a partial arc; in another embodiment, the positions of the ball groove 261 and the limiting groove can be exchanged, that is, the ball groove 261 is set on the inner side of the base 100, and the limiting groove is set on the second prism bracket 230;

[0038] In one embodiment, in order to improve the stability of the cooperation between the ball 262 and the ball groove 261 and the base 100, the inner side of the ball groove 261 is magnetically matched with the base 100 through a magnetic attraction component 263; in one embodiment, the magnetic attraction component 263 includes an adsorption magnet 2631 arranged on the inner side of the ball groove 261 and an adsorption magnet sheet 2632 arranged on the inner side of the base 100 opposite to the adsorption magnet 2631; in one embodiment, the magnetic attraction component 263 includes an adsorption magnet sheet 2632 arranged on the inner side of the ball groove 261 and an adsorption magnet 2631 arranged on the inner side of the base 100 opposite to the adsorption magnet sheet 2632; in one embodiment, the magnetic attraction component 263 includes two magnets that attract each other, which are respectively arranged on the inner side of the ball groove 261 and the inner side of the base 100;

[0039] like Figure 6 As shown, in one embodiment, another magnetic attraction component 263 is provided between the first prism bracket 220 and the second prism bracket 230. The magnetic attraction component 263 can also increase the stability of the connection between the first prism bracket 220 and the second prism bracket 230, and can effectively ensure that the rotating shaft 222 is clamped between the first prism bracket 220 and the second prism bracket 230, so that the prism module 200 is closer to a whole. When the second prism bracket 230 moves, it can synchronously drive the first prism bracket 220 and the prism 210 to move synchronously, thereby improving the movement accuracy and stability. In one embodiment, the magnetic attraction component 263 includes an adsorption magnet 2631 provided at the bottom of the first prism bracket 220 and an adsorption magnet sheet provided at the top of the second prism bracket 230 relative to the adsorption magnet 2631. 2632; in one embodiment, the magnetic attraction component 263 includes a magnet sheet 2632 disposed at the bottom of the first prism bracket 220 and an adsorption magnet 2631 disposed at the top of the second prism bracket 230 opposite to the magnet sheet 2632; in one embodiment, the magnetic attraction component 263 includes two magnets that attract each other, which are respectively disposed at the bottom of the first prism bracket 220 and the second prism bracket 230. For example, the first magnet 251 can be used as one of the magnets on the second prism bracket 230, and another magnet is disposed at the bottom of the first prism bracket 220 to form the magnetic attraction component 263. Since the plate thickness of the second prism bracket 230 is moderate, the magnet on the second prism bracket 230 can be disposed at the upper part, the lower part or the middle part to form a magnetic attraction structure with the first prism 220.

[0040] like Figure 5As shown, the periscope camera module, the base 100 is used to carry the prism module 200 and the lens module 300 arranged side by side; the periscope camera module includes the above-mentioned two-axis prism motor rotation mechanism; the prism module 200 and the lens module 300 are arranged side by side in the accommodating space 101 of the base 100, and the prism module 200 is used to install the prism 210 module, and drive the prism 210 module to move in different directions under the drive of the corresponding driving mechanism; a top cover 110 is sleeved on the top of the base 100 to form a complete periscope module; the top cover 110 is provided with a light inlet 111 opposite to the prism module 200, and the light enters the prism module 210 module in the prism module 200 through the light inlet 111, and enters the imaging chip located at the rear end of the lens module along the optical axis direction after being reflected;

[0041] The lens module 300 is used to install the lens module, so that the lens module can move in the base 100 along the optical axis direction of the lens module. More specifically, the base 100 is provided with a accommodating space 101, and the lens module 300 moves in the accommodating space 101 along the optical axis direction of the lens module; at least one side of the lens module 300 is provided with a driving magnet, and the inner side surface of the accommodating space 101 is provided with a driving coil corresponding to the driving magnet, and the driving coil cooperates with the driving magnet to drive the lens module 300 to move along the optical axis direction; the bottom of the lens module 300 is provided with an adsorption magnet 2631 (not shown in the figure); the adsorption magnet 2631 acts on the bottom of the accommodating space 101 to generate an adsorption force to strengthen the connection between the lens module 300 and the base 100.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. Two-axis prism motor rotation mechanism, characterized by: The invention comprises a prism module (200) movably arranged in a base (100); the prism module (200) comprises a prism (210); the prism (210) is fixedly arranged on a first prism bracket (220); a second prism bracket (230) is arranged below the first prism bracket (220); the first prism bracket (220) drives the prism (210) to rotate around a first axis (221); the second prism bracket (230) drives the first prism bracket (220) to rotate around a second axis (231); the first axis (221) The first prism bracket (220) is perpendicular to the second axis (231); the second axis (231) is parallel to the optical axis direction; the base (100) is provided with a first driving component (240) located on the side of the first prism bracket (220) to drive the first prism bracket (220) to rotate around the first axis (221) and a second driving component (250) located below the second prism bracket (230) to drive the second prism bracket (230) to rotate around the second axis (231); a rotation guide mechanism (260) is provided between the second prism bracket (230) and the base (100).

2. The two-axis prism motor rotation mechanism according to claim 1, characterized in that: The first prism support (220) rotates around a first axis (221) via a plurality of rotation axes (222).

3. The two-axis prism motor rotation mechanism according to claim 2, characterized in that: The first prism bracket (220) rotates around a first axis (221) via a rotating shaft (222); a receiving groove (223) with an opening facing downward is provided below the first prism bracket (220); the top of the receiving groove (223) abuts against the rotating shaft (222); a supporting groove (232) with an opening facing upward is provided above the second prism bracket (230); the rotating shaft (222) abuts against the bottom of the supporting groove (232) to support the rotating shaft (222).

4. The two-axis prism motor rotation mechanism according to claim 1, characterized in that: The first driving component (240) comprises a second magnet (241) arranged on two opposite side surfaces of the first prism bracket (220) along the direction of the first axis (221) and a second coil (242) arranged on the inner side of the base (100) opposite to the second magnet (241).

5. The two-axis prism motor rotation mechanism according to claim 1, characterized in that: The second driving component (250) comprises a first magnet (251) arranged at the bottom of the second prism bracket (230) and a first coil (252) arranged on the inner side of the base (100) relative to the first magnet (251).

6. The two-axis prism motor rotation mechanism according to claim 1, characterized in that: The rotary guide mechanism (260) comprises a ball groove (261) provided on the second prism bracket (230); the ball groove (261) is in an arc shape, the center of the arc passes through the second shaft (231); and a ball (262) is provided between the ball groove (261) and the inner side of the base (100).

7. The two-axis prism motor rotation mechanism according to claim 6, characterized in that: The inner side of the ball groove (261) is magnetically matched with the base (100) through a magnetic attraction component (263); another magnetic attraction component (263) is provided between the first prism bracket (220) and the second prism bracket (230).

8. The two-axis prism motor rotation mechanism according to claim 7, characterized in that: The magnetic attraction component (263) comprises an attraction magnet (2631) provided on the inner side of the ball groove (261) and an attraction magnet sheet (2632) provided on the inner side of the base (100) opposite to the attraction magnet (2631).

9. Periscope camera module, characterized in that: It comprises the two-axis prism motor rotation mechanism as described in any one of claims 1 to 8 and a lens module arranged on one side of the prism module (200).

10. The periscope camera module according to claim 9, characterized in that: The lens module is movable in the base (100) along the optical axis direction; the top of the base (100) is matched with a top cover (110); the top cover (110) is provided with a light inlet hole (111); the light inlet hole (111) is arranged opposite to the prism (210).

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