CN115047691B

CN115047691B - Lens module and electronic equipment

Info

Publication number: CN115047691B
Application number: CN202210601926.0A
Authority: CN
Inventors: 阚立峰; 陶淑林; 张�杰
Original assignee: Goertek Optical Technology Co Ltd
Current assignee: Goertek Optical Technology Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2023-08-04
Anticipated expiration: 2042-05-30
Also published as: CN115047691A; WO2023231101A1

Abstract

The application discloses a lens module and electronic equipment, the lens module comprises a lens body and a focusing mechanism, wherein the focusing mechanism is connected with the lens body and can drive the lens body to move along a first direction; the focusing mechanism comprises a motor, an adapter rod and a focusing rod, wherein the motor comprises a motor body and a power output shaft connected with the motor body, the axial direction of the power output shaft is arranged along a first direction, and a threaded part is arranged on the power output shaft; the transfer rod comprises a transfer rod body, a threaded hole is formed in the transfer rod body, and the power output shaft is in threaded connection with the threaded hole; the power output shaft rotates and drives the conversion rod to move in a translational mode along a first direction; one end of the focusing rod is connected with the switching rod, and the other end of the focusing rod is connected with the lens body; the focusing rod drives the lens body to move in a translational mode along the first direction along with the switching rod.

Description

Lens module and electronic equipment

Technical Field

The present disclosure relates to the field of optical devices, and more particularly, to a lens module and an electronic device.

Background

Nowadays, with the vigorous development of science and technology, the projection technology has become mature, and the application field of projection equipment has become wider and wider, for example, the projection equipment is applied to business fields such as conference explanation, tour exhibition and sales promotion, the education fields such as school teaching and academic discussion, and the home field such as home theater. In recent years, digital Light Processing (DLP) projectors have become the dominant technology of projectors, which are all the preferred choices in projection display products in terms of light weight, durability, high brightness, high contrast, etc.

In digital light processing projection devices, adjustment of the focal length of the lens is very important; if the focusing accuracy is not high, the expected focusing effect cannot be achieved, so that adverse effects are brought to the whole machine debugging and the user experience. Therefore, how to improve the focusing mechanism of a lens to improve focusing accuracy is one of the important subjects of attention in the industry.

Disclosure of Invention

An object of the present application is to provide a novel technical solution for a lens module and an electronic device.

According to a first aspect of the present application, there is provided a lens module, including a lens body and a focusing mechanism, the focusing mechanism being connected to the lens body and being capable of driving the lens body to move along a first direction; the focusing mechanism includes:

the motor comprises a motor body and a power output shaft connected with the motor body, wherein the axial direction of the power output shaft is along the first direction, and a threaded part is arranged on the power output shaft;

the transfer rod comprises a transfer rod body, a threaded hole is formed in the transfer rod body, and the power output shaft is in threaded connection with the threaded hole; the power output shaft rotates and drives the transfer rod to move in a translational mode along the first direction;

one end of the focusing rod is connected with the switching rod, and the other end of the focusing rod is connected with the lens body; the focusing rod drives the lens body to move in a translational mode along the first direction along the transfer rod.

Optionally, a transfer hole is formed in the transfer rod body, and one end of the focusing rod is connected with the transfer hole;

the focusing rod is connected with the transfer hole in interference fit and/or the focusing rod is connected with the transfer hole through an adhesive.

Optionally, the focusing mechanism further comprises a supporting seat, and the motor body is fixed on the supporting seat;

the lens module comprises a module shell, the lens body is arranged in the module shell, and the supporting seat is connected with the module shell.

Optionally, the supporting seat comprises a bracket and a base which are connected with each other, the motor body is fixed on the bracket, and the base is connected with the module shell.

Optionally, the bracket comprises a bracket body, and the motor body is fixed on the bracket body;

the support body is provided with a screw hole, and the power output shaft is connected with the screw hole.

Optionally, the bracket body has a bottom wall, a first side wall and a second side wall, where the first side wall and the second side wall are connected to the bottom wall, and the first side wall and the second side wall are opposite to each other; the transfer rod is located between the first side wall and the second side wall.

Optionally, two screw holes are provided, one of the screw holes is provided on the first side wall, and the other screw hole is provided on the second side wall.

Optionally, the focusing mechanism further comprises a circuit board, the circuit board comprises a circuit board body, a first pin is arranged on the circuit board body, a second pin is arranged on the motor body, and the first pin is connected with the second pin.

Optionally, a photoelectric coupler is arranged on the circuit board body, and the photoelectric coupler is provided with a light detection area; the transfer rod further comprises a stop block, and the stop block is connected with the transfer rod body; the stop is located in the light detection area.

Optionally, the focusing mechanism further includes a guide rod, the axial direction of the guide rod is along the first direction, a first guide hole is formed in the adapter rod body, and the guide rod is connected with the first guide hole.

Optionally, a connecting shaft is disposed in the module housing along the first direction, and the lens body is connected with the connecting shaft.

According to a second aspect of the present application, there is provided an electronic device comprising a lens module as described in the first aspect.

In the lens module that this application embodiment provided, can carry out comparatively accurate control to focusing speed through the pitch size of the screw thread portion that sets up on the power take off shaft and control motor pivoted frequency to make the lens body reach comparatively accurate focusing precision, improve user's use experience.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a lens module according to an embodiment of the present application;

fig. 2 is a schematic diagram of a part of a lens module according to an embodiment of the disclosure;

fig. 3 is a schematic structural diagram of a focusing mechanism in a lens module according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a focusing mechanism in a lens module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a focusing mechanism in a lens module according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a transfer rod in a lens module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a circuit board in a lens module according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a bracket in a lens module according to an embodiment of the present application;

fig. 9a is a schematic structural diagram of a base in a lens module according to an embodiment of the present disclosure;

fig. 9b is a schematic diagram of a base structure of a lens module according to an embodiment of the disclosure.

Reference numerals illustrate:

1. a lens body; 2. a focusing mechanism; 21. a motor; 210. a motor body; 211. a power output shaft; 212. a second pin; 22. a transfer rod; 221. a transfer rod body; 222. a threaded hole; 223. a transfer hole; 224. a stop block; 225. a first guide hole; 23. a focusing rod; 24. a circuit board; 241. a circuit board body; 242. a first pin; 243. a photocoupler; 244. a second positioning hole; 245. a fourth screw hole; 25. a guide rod; 26. a bracket; 261. a bracket body; 2611. a bottom wall; 2612. a first sidewall; 2613. a second sidewall; 262. a screw hole; 263. a second guide hole; 264. a first positioning hole; 265. a third screw hole; 27. a base; 271. a bottom plate; 272. a first positioning column; 273. a first screw hole; 274. a second positioning column; 275. a second screw hole; 28. a bearing; 3. a module housing; 4. and a connecting shaft.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-9 b, according to one embodiment of the present application, there is provided a lens module, the lens module includes a lens body 1 and a focusing mechanism 2, the focusing mechanism 2 is connected with the lens body 1 and can drive the lens body 1 to move along a first direction; the focusing mechanism 2 comprises a motor 21, an adapter rod 22 and a focusing rod 23, wherein the motor 21 comprises a motor body 210 and a power output shaft 211 connected with the motor body 210, the axial direction of the power output shaft 211 is arranged along the first direction, and a threaded part is arranged on the power output shaft 211;

the transfer rod 22 comprises a transfer rod body 221, a threaded hole 222 is formed in the transfer rod body 221, and the power output shaft 211 is in threaded connection with the threaded hole 222; the power output shaft 211 rotates and drives the transfer rod 22 to move in a translational manner along the first direction;

one end of the focusing rod 23 is connected with the switching rod 22, and the other end of the focusing rod 23 is connected with the lens body 1; the focusing rod 23 drives the lens body 1 to move in a translational manner along the first direction along with the switching rod 22.

In the lens module provided in this embodiment, when the lens body 1 needs to be focused, the motor 21 is turned on, and the power output shaft 211 of the motor 21 rotates, and because the power output shaft 211 is connected with the threaded hole 222 formed in the adapter rod 22 through threaded fit, the rotation of the power output shaft 211 in the threaded hole 222 is converted into the translational motion of the adapter rod 22, so as to drive the adapter rod 22 to perform the translational motion along the axial direction, i.e. the first direction, of the power output shaft 211. Meanwhile, since one end of the focusing lever 23 is connected with the adapter lever 22 and the other end is connected with the lens body 1; therefore, the transfer rod 22 performs translational movement along the first direction and drives the focusing rod 23 to perform translational movement along the first direction, and the focusing rod 23 further drives the lens body 1 to perform translational movement along the first direction, thereby achieving the purpose of focusing the lens body 1.

In the lens module provided in the embodiment of the present application, the focusing speed can be controlled more precisely by the pitch size of the screw thread portion set on the power output shaft 211 and the frequency of controlling the rotation of the motor 21, so that the lens body 1 achieves more precise focusing precision, and the use experience of the user is improved.

In the lens module provided by the embodiment of the application, the purpose of focusing the lens body 1 is achieved through the threaded fit of the power output shaft 211 of the motor 21 and the adapter rod 22 and the connection fit of the adapter rod 22 and the focusing rod 23; the structure of the transmission fit is simple, the installation is convenient, and the tolerance accumulation of the installation is small.

Further, an axial gap inevitably exists between the power output shaft 211 and the screw hole 222 of the adapter rod 22, and the larger the axial gap is, the lower the focusing accuracy is, and therefore, the axial gap should be reduced as much as possible. In practical applications, the axial clearance between the power take-off shaft 211 and the threaded hole 222 may be minimized by trimming the profile of the threaded portion of the power take-off shaft 211 and the profile of the threaded hole 222, for example, by making the profile as deep as possible. Of course, the above-mentioned reduction of the axial gap is also required to ensure that the force output from the adapter rod 22 to the focusing rod 23 is proper.

In one embodiment, further, the adapter rod body 221 is provided with an adapter hole 223, and one end of the focusing rod 23 is connected with the adapter hole 223; and the focusing rod 23 is connected with the adapting hole 223 in an interference fit manner and/or the focusing rod 23 is connected with the adapting hole 223 through an adhesive.

In this specific example, the focusing rod 23 and the switching rod 22 are specifically connected in such a way that the focusing rod 23 is connected to the switching hole 223 formed in the switching rod body 221; and, realize fastening connection through interference fit's mode between focusing rod 23 and the switching hole 223, perhaps realize fastening connection through the mode that the point was glued between focusing rod 23 and the switching hole 223, perhaps, further carry out the point between focusing rod 23 and the switching hole 223 and glue on interference fit's basis to ensure the insensitivity of both connections. Thereby, the fit clearance of the assembly between the focus lever 23 and the adapter hole 223 is eliminated as much as possible, thereby further improving the focusing accuracy of the lens body 1.

In one embodiment, the focusing mechanism 2 further includes a support base, and the motor body 210 is fixed on the support base;

the lens module comprises a module shell 3, the lens body 1 is arranged in the module shell 3, and the supporting seat is connected with the module shell 3.

In this specific example, the support base is not only used to fix the motor 21, but also connects the entire focusing mechanism 2 with the module housing 3 where the lens body 1 is located, so as to achieve the function of connection support between the components.

Referring to fig. 3, in one embodiment, the support base further includes a bracket 26 and a base 27 connected to each other, the motor body 210 is fixed on the bracket 26, and the base 27 is connected to the module housing 3.

In this particular example, the support base comprises in particular a bracket 26 and a base 27 connected to each other, wherein the motor 21 is connected to the bracket 26 and the base 27 is responsible for the connection with the module housing 3. Further, the base 27 and the module case 3 are connected by a fastener such as a screw or by an adhesive such as glue.

Referring to fig. 4 and 8, in one embodiment, the stand 26 further includes a stand body 261, and the motor body 210 is fixed to the stand body 261;

the bracket body 261 is provided with a screw hole 262, and the power output shaft 211 is connected with the screw hole 262.

In this specific example, further, the motor body 210 of the motor 21 is welded to the bracket body 261, and the power output shaft 211 of the motor 21 passes through the screw hole 262 formed in the bracket body 261; so that the rotation of the power output shaft 211 is not affected while the motor 21 is mounted and fastened.

Referring to fig. 8, in one embodiment, the bracket body 261 further includes a bottom wall 2611, a first side wall 2612 and a second side wall 2613, wherein the first side wall 2612 and the second side wall 2613 are connected to the bottom wall 2611, and the first side wall 2612 is opposite to the second side wall 2613; the transfer lever 22 is located between the first sidewall 2612 and the second sidewall 2613. Further, two screw holes 262 are provided, wherein one screw hole 262 is opened at the first sidewall 2612, and the other screw hole 262 is opened at the second sidewall 2613.

In this particular example, the motor body 210 is welded at a side of the first sidewall 2612 facing away from the second sidewall 2613; the power output shaft 211 sequentially passes through the screw hole 262 arranged on the first side wall 2612, the threaded hole 222 arranged on the switching rod 22 and the screw hole 262 arranged on the second side wall 2613; further, as shown in fig. 5, a bearing 28 is connected to the end of the power output shaft 211 away from the motor body 210, and the bearing 28 abuts against the side surface of the second side wall 2613 facing away from the first side wall 2612; thereby, the stability of the rotation of the power output shaft 211 is ensured.

The transfer rod 22 is located between the first side wall 2612 and the second side wall 2613, i.e., the transfer rod 22 performs translational movement between the first side wall 2612 and the second side wall 2613; the first side wall 2612 and the second side wall 2613 not only play a role in fixedly mounting the motor 21 and the bearing 28, but also play a role in limiting the translational movement of the switching lever 22.

Referring to fig. 3, 4 and 7, in one embodiment, the focusing mechanism 2 further includes a circuit board 24, the circuit board 24 includes a circuit board body 241, a first pin 242 is disposed on the circuit board body 241, and the motor body 210 is disposed with a second pin 212, and the first pin 242 is connected with the second pin 212.

In this particular example, the first pin 242 is connected to the second pin 212 to make electrical connection of the motor 21 to the circuit board 24.

Further, the circuit board 24 is also connected to the base 27; specifically, the base 27 has a bottom plate 271, where the bottom plate 271 includes two surfaces disposed opposite to each other, and one of the surfaces is provided with a first positioning column 272 and a first screw hole 273; the other surface is provided with a second positioning post 274 and a second screw hole 275. The bottom wall 2611 of the bracket 26 is provided with a first positioning hole 264 and a third screw hole 265, the first positioning column 272 is connected with the first positioning hole 264 in a matched manner, and the first screw hole 273 is connected with the third screw hole 265 in a matched manner through a screw. A second positioning hole 244 and a fourth screw hole 245 are formed in the circuit board body 241, the second positioning column 274 is connected with the second positioning hole 244 in a matched manner, and the second screw hole 275 is connected with the fourth screw hole 245 in a matched manner through a screw.

Referring to fig. 4 and 7, in one embodiment, further, a photo coupler 243 is disposed on the circuit board body 241, and the photo coupler 243 has a light detection area; the transfer lever 22 further comprises a block 224, and the block 224 is connected with the transfer lever body 221; the stop 224 is located in the light detection region.

In this specific example, the stop block 224 performs translational movement in the light detection area of the photoelectric coupler 243 while the motor 21 drives the translational movement of the adapter rod 22, so that the position information of the motor 21 can be fed back through the shading amount of the stop block 224, and accurate control of the start-stop action of the motor 21 is realized.

Referring to fig. 5, in one embodiment, the focusing mechanism 2 further includes a guide rod 25, an axial direction of the guide rod 25 is set along the first direction, the adapter rod body 221 is provided with a first guide hole 225, and the guide rod 25 is connected with the first guide hole 225.

In this particular example, the guide bar 25 may be provided to guide the translational movement of the transfer bar 22, thereby ensuring that the transfer bar 22 will only perform translational movement in the first direction and not a tilting or rotating movement.

Further, the bracket body 261 is provided with a second guiding hole 263; the guide rod 25 is connected to the second guide hole 263. And, two second guide holes 263 are provided, wherein one second guide hole 263 is opened at the first sidewall 2612, and the other second guide hole 263 is opened at the second sidewall 2613. I.e., both ends of the guide rod 25 are respectively coupled in the two second guide holes 263, and the guide rod 25 passes through the first guide holes 225.

Referring to fig. 1, in one embodiment, a connection shaft 4 is further disposed in the module housing 3 along the first direction, and the lens body 1 is connected to the connection shaft 4.

In this particular example, the connection shaft 4 may be provided to guide the translational movement of the lens body 1 in the first direction. Further, two connecting shafts 4 are provided, and the two connecting shafts 4 are respectively positioned at two sides of the lens body 1.

According to another embodiment of the present application, there is provided an electronic device including the lens module as described above.

Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. The lens module is characterized by comprising a lens body (1) and a focusing mechanism (2), wherein the focusing mechanism (2) is connected with the lens body (1) and can drive the lens body (1) to move along a first direction; the focusing mechanism (2) includes:

a motor (21), wherein the motor (21) comprises a motor body (210) and a power output shaft (211) connected with the motor body (210), the axial direction of the power output shaft (211) is arranged along the first direction, and a thread part is arranged on the power output shaft (211);

the power output shaft (211) is in threaded connection with the threaded hole (222); the power output shaft (211) rotates and drives the transfer rod (22) to move in a translational mode along the first direction;

the focusing rod (23), one end of the focusing rod (23) is connected with the switching rod (22), and the other end of the focusing rod (23) is connected with the lens body (1); the focusing rod (23) drives the lens body (1) to move in a translational mode along the first direction along with the switching rod (22);

a bracket (26), the bracket (26) comprising a bracket body (261), the motor body (210) being fixed on the bracket body (261); the bracket body (261) is provided with a bottom wall (2611), a first side wall (2612) and a second side wall (2613), wherein the first side wall (2612) and the second side wall (2613) are connected with the bottom wall (2611), and the first side wall (2612) and the second side wall (2613) are arranged opposite to each other; the transfer lever (22) is located between the first side wall (2612) and the second side wall (2613).

2. The lens module according to claim 1, wherein the adapter rod body (221) is provided with an adapter hole (223), and one end of the focusing rod (23) is connected with the adapter hole (223);

the focusing rod (23) is connected with the adapting hole (223) in an interference fit mode and/or the focusing rod (23) is connected with the adapting hole (223) through an adhesive.

3. Lens module according to claim 1, characterized in that the focusing mechanism (2) further comprises a support base,

the lens module comprises a module shell (3), the lens body (1) is arranged in the module shell (3), and the supporting seat is connected with the module shell (3).

4. A lens module according to claim 3, wherein the support base comprises a bracket (26) and a base (27) connected to each other, the base (27) being connected to the module housing (3).

5. The lens module as recited in claim 4, wherein,

screw holes (262) are formed in the support body (261), and the power output shaft (211) is connected with the screw holes (262).

6. The lens module according to claim 1, wherein two screw holes (262) are provided, one screw hole (262) being opened in the first side wall (2612) and the other screw hole (262) being opened in the second side wall (2613).

7. The lens module according to claim 1, wherein the focusing mechanism (2) further comprises a circuit board (24), the circuit board (24) comprises a circuit board body (241), a first pin (242) is provided on the circuit board body (241), a second pin (212) is provided on the motor body (210), and the first pin (242) is connected with the second pin (212).

8. The lens module according to claim 7, wherein a photo coupler (243) is provided on the circuit board body (241), the photo coupler (243) having a light detection area; the transfer rod (22) further comprises a stop block (224), and the stop block (224) is connected with the transfer rod body (221); the stop (224) is located in the light detection region.

9. The lens module according to claim 1, wherein the focusing mechanism (2) further comprises a guide rod (25), the axial direction of the guide rod (25) is set along the first direction, the adapter rod body (221) is provided with a first guide hole (225), and the guide rod (25) is connected with the first guide hole (225).

10. A lens module according to claim 3, wherein a connecting shaft (4) is provided in the module housing (3) along the first direction, and the lens body (1) is connected to the connecting shaft (4).

11. An electronic device, characterized in that the electronic device comprises a lens module according to any of claims 1-10.