CN116801082A

CN116801082A - Camera module and electronic equipment

Info

Publication number: CN116801082A
Application number: CN202210240149.1A
Authority: CN
Inventors: 苏佳奇; 马志廷; 高锟林
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2023-09-22

Abstract

The application discloses a camera module and electronic equipment, and belongs to the technical field of camera shooting. The photosensitive chip of the camera module is arranged on the base, the first lens barrel is sleeved on the base, the first lens barrel is connected with the base through the first matching bulge and the first spiral guide groove, the first lens barrel is provided with a first lens, and the first lens can move along a first direction relative to the first lens barrel; the first driving mechanism drives the first lens barrel to move along a first direction under the cooperation of the first cooperation protrusion and the first spiral guide groove; the second driving mechanism comprises a driving magnet and a driving coil, one of the first lens barrel and the first lens is provided with the driving magnet, the other one of the first lens barrel and the first lens barrel is provided with the driving coil, the first lens barrel moves along a first direction relative to the first lens barrel under the condition that the driving coil acts with the driving magnet, and the first direction is a direction approaching to or far from the photosensitive chip. The scheme can solve the problem that the focusing precision of the camera module is obviously reduced due to deviation of the matching precision of the matching bulge and the sliding chute.

Description

Camera module and electronic equipment

Technical Field

The application belongs to the technical field of camera shooting, and particularly relates to a camera module and electronic equipment.

Background

Nowadays, with the increasing imaging technologies of electronic devices, it is desired to capture higher quality images by using the electronic devices.

In the actual photographing process, the sharpness of the photographed image can be enhanced by optical focusing. Optical focusing can be re-focused by changing the position of the lens, and therefore the lens needs to be moved during focusing. In order to realize the movement of the lenses, a matching bulge can be arranged on one lens barrel, a chute is arranged on the other lens barrel, and the matching bulge is in sliding fit with the chute, so that the relative movement between the two lens barrels is realized, and finally the movement of the lenses is realized.

Because the matching bulge and the sliding groove are in line contact, if the electronic equipment is subjected to various accidental injuries such as falling, collision and pressing, the matching precision of the matching bulge and the sliding groove is easy to deviate, so that the focusing precision of the camera module is easy to be obviously reduced.

Disclosure of Invention

The embodiment of the application aims to provide a camera module and electronic equipment, which can solve the problem that the focusing precision of the camera module is obviously reduced due to deviation of the matching precision of a matching bulge and a sliding groove.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, an embodiment of the present application provides a camera module, including a base, a photosensitive chip, a first lens barrel, a first lens, a first driving mechanism, and a second driving mechanism, where:

the photosensitive chip is arranged on the base, the first lens barrel is sleeved on the base, the first lens barrel is connected with the base through a first matching bulge and a first spiral guide groove, the first lens barrel is provided with the first lens, and the first lens can move along a first direction relative to the first lens barrel;

the first driving mechanism is connected with the first lens barrel and drives the first lens barrel to move along the first direction under the cooperation of the first cooperation protrusion and the first spiral guide groove;

the second driving mechanism comprises a driving magnet and a driving coil, one of the first lens barrel and the first lens is provided with the driving magnet, the other one of the first lens barrel and the first lens barrel is provided with the driving coil, the first lens barrel moves along the first direction relative to the first lens barrel under the condition that the driving coil acts with the driving magnet, and the first direction is a direction approaching to or away from the photosensitive chip.

In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the camera module.

In the embodiment of the application, when the camera module is required to realize focusing, the driving coil can be electrified, so that the first lens is driven to move along the first direction by the acting force formed between the driving coil and the driving magnet, thereby realizing focusing and further improving the definition of the shot image. Compared with a focusing driving mode of matching the bulge and the groove, the focusing driving mode adopts a non-contact mode for transmission, so that when electronic equipment falls, collides, presses and other accidental injuries, the matching precision between the driving magnet and the driving coil cannot be changed, and the focusing precision of the camera module cannot be reduced.

Drawings

FIG. 1 is a cross-sectional view of a camera module according to an embodiment of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a cross-sectional view of a portion of a camera module according to an embodiment of the present application;

fig. 4 is a schematic diagram of a part of a structure of a camera module according to an embodiment of the present application.

Reference numerals illustrate:

110-base, 111-bottom plate, 120-first barrel, 121-first mating protrusion, 122-second flange, 130-first lens, 140-first drive mechanism, 150-second drive mechanism, 151-drive magnet, 152-drive coil, 160-first spring, 161-first connection, 162-second connection, 163-spring, 170-first lens holder, 171-first flange, 180-electrical connection, 190-harness structure, 191-first section, 192-second section, 193-third section, 200-active barrel, 201-second helical guide slot, 210-second lens holder, 220-third drive mechanism, 221-second spring, 222-guide rod, 230-second lens, 240-second barrel, 240-first helical guide slot, 242-second mating protrusion 241.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The camera module provided by the embodiment of the application is described in detail below by means of specific embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 1 to 4, an embodiment of the present application provides a camera module, which includes a base 110, a photosensitive chip, a first lens barrel 120, a first lens 130, a first driving mechanism 140, and a second driving mechanism 150.

The photosensitive chip is disposed on the base 110, and the base 110 can be provided with other devices of the camera module besides the photosensitive chip. The first lens barrel 120 is sleeved on the base 110, and the first lens barrel 120 can be connected with the base 110 through the first matching protrusion 121 and the first spiral guide groove 241. Alternatively, the first lens barrel 120 may be directly connected to the base 110, where one of the base 110 and the first lens barrel 120 is provided with a first mating protrusion 121, and the other is provided with a first spiral guiding groove 241, and the first lens barrel 120 may rotate and then move under the action of the first mating protrusion 121 and the first spiral guiding groove 241. Alternatively, the camera module may further include an active lens barrel 200, the active lens barrel 200 is rotationally connected with the base 110, the first lens barrel 120 may be sleeved on the active lens barrel 200, and the active lens barrel 200 is sleeved on the base 110, that is, the first lens barrel 120 may be sleeved on the base 110 through the active lens barrel 200. Alternatively, the first lens barrel 120 and the active lens barrel 200 may be directly connected, at this time, one of the first lens barrel 120 and the active lens barrel 200 is provided with the first engaging protrusion 121, and the other is provided with the first spiral guiding groove 241, so that the first lens barrel 120 may be directly driven by the active lens barrel 200 to retract, which is more convenient for the first lens barrel 120 to retract. In another embodiment, the camera module may further include a second lens barrel 240, where the first lens barrel 120 and the active lens barrel 200 may be connected by the second lens barrel 240, and at this time, one of the first lens barrel 120 and the second lens barrel 240 is provided with a first mating protrusion 121, the other is provided with a first spiral guiding groove 241, one of the second lens barrel 240 and the active lens barrel 200 is provided with a second mating protrusion 242, and the other is provided with a second spiral guiding groove 201, and under the mating of the first mating protrusion 121 and the first spiral guiding groove 241 and the mating of the second mating protrusion 242 and the second spiral guiding groove 201, the first lens barrel 120 and the second lens barrel 240 may be retracted, so that the retraction distance of the first lens barrel 120 is greater.

The first lens barrel 120 is provided with a first lens 130, the first lens 130 can move along a first direction relative to the first lens barrel 120, the first direction can be a direction approaching or separating from a photosensitive chip, and the photosensitive chip can be used for receiving light passing through the first lens 130 and finally converting the light signal into a digital image signal, so that an image is obtained.

The first driving mechanism 140 is connected to the first barrel 120, alternatively, the first driving mechanism 140 may be directly connected to the first barrel 120, or may be connected to the first barrel 120 through the active barrel 200. The first driving mechanism 140 drives the first barrel 120 to move in the first direction with the first fitting protrusion 121 and the first spiral guide groove 241. That is, the first driving mechanism 140 may drive the first lens barrel 120 to approach and separate from the photosensitive chip, thereby changing the distance between the first lens 130 and the photosensitive chip. Alternatively, the first driving mechanism 140 may output a rotational driving force, which may include a motor or the like.

Alternatively, the first driving mechanism 140 may include a first driving source, a worm wheel, and a driving wheel, the driving barrel 200 may be provided with a rack portion, and an output shaft of the first driving source is coaxially disposed with the worm, so that the first driving source may drive the worm to rotate, and the worm is engaged with the worm wheel, so that the worm may drive the worm wheel to rotate, and the worm wheel is engaged with the driving wheel, so that the worm wheel may drive the driving wheel to rotate, and the driving wheel is engaged with the rack portion, so that the driving barrel 200 further drives the first barrel 120 to move through the rack portion. The first driving mechanism 140 has the advantages of simple structure, high transmission precision, long service life and the like.

The second driving mechanism 150 includes a driving magnet 151 and a driving coil 152, one of the first barrel 120 and the first lens 130 is provided with the driving magnet 151, and the other is provided with the driving coil 152, and the first lens 130 moves in the first direction with respect to the first barrel 120 with the driving coil 152 acting with the driving magnet 151. In other words, the second driving mechanism 150 can directly drive the first lens 130 to approach the photosensitive chip and to depart from the photosensitive chip, so as to change the distance between the first lens 130 and the photosensitive chip to achieve focusing. Alternatively, both the driving magnet 151 and the driving coil 152 may be provided in a ring-shaped structure, thereby increasing the force therebetween.

In the embodiment of the present application, when the camera module is required to achieve focusing, the driving coil 152 may be energized, so that the first lens 130 is driven to move along the first direction by the acting force formed between the driving coil 152 and the driving magnet 151, so as to achieve focusing, and further improve the definition of the captured image. Compared with a focusing driving mode of matching the convex and the concave, the focusing driving mode adopts a non-contact mode for transmission, so that when the electronic equipment is subjected to various accidental injuries such as falling, collision and pressing, the matching precision between the driving magnet 151 and the driving coil 152 cannot be changed, and the focusing precision of the camera module cannot be reduced.

In an alternative embodiment, the camera module may further include a second lens support 210 and a third driving mechanism 220, where the second lens support 210 is movably disposed on the base 110, and the second lens support 210 is provided with a second lens 230, and the second lens 230 is located between the photosensitive chip and the first lens 130. The third drive mechanism 220 is coupled to the second lens frame 210, and the third drive mechanism 220 drives the second lens frame 210 to move in the first direction. That is, the third driving mechanism 220 may drive the second lens 230 to approach the photosensitive chip and to depart from the photosensitive chip, thereby changing the distance between the second lens 230 and the photosensitive chip. Alternatively, the third driving mechanism 220 may output a telescopic driving force, which may include a telescopic cylinder or the like.

The first lens 130 is driven to move by the first driving mechanism 140, and the second lens 230 is driven to move by the third driving mechanism 220, so that zooming of the camera module can be realized. When the camera module includes the first lens 130 and the second lens 230 at the same time, the zoom range of the camera module is larger.

The third driving mechanism 220 may include a second driving source, which is disposed at the base 110, a screw coupled to the screw, and a nut screw coupled to the screw, which is coupled to the second lens holder 210, and which drives the second lens holder 210 to move in the first direction. Alternatively, the base 110 may include a bottom plate 111, and the bottom plate 111 may be provided with a second driving source. Alternatively, the second driving source and the lead screw may be disposed in parallel, both extending in the first direction, thereby making the structure of the third driving mechanism 220 more compact. The second drive source may drive the screw to rotate, and the screw may drive the nut to move in the first direction, thereby driving the second lens support 210 to move in the first direction. The nut does not have to be a standard member, and may be provided with an internal thread. Such a third driving mechanism 220 has advantages of compact structure, high transmission accuracy, and the like.

Optionally, the third driving mechanism 220 may further include a second elastic member 221, where the second elastic member 221 is disposed between the nut and the second lens bracket 210, and optionally, the second elastic member 221 may be sleeved on the guide rod 222. The nut drives the second lens support 210 to move along the first direction through the second elastic member 221, and the second elastic member 221 moves the second lens support 210 along the direction approaching to the photosensitive chip when the second lens support 210 is subjected to external force. When the second lens support 210 is subjected to an external force, the external force acts on the second elastic member 221, and the second elastic member 221 can deform, so that the external force is buffered, and the damage to the components such as the second lens support 210 and the third driving mechanism 220 due to the external force is prevented. Alternatively, the second elastic member 221 may be a spring.

The first driving mechanism 140, the second driving mechanism 150 and the third driving mechanism 220 may work simultaneously or sequentially, and when the first driving mechanism 140 and the third driving mechanism 220 work simultaneously, the positions of the first lens 130 and the second lens 230 may change simultaneously, so that the camera module is switched to the target state more quickly, thereby realizing quick zooming. When the second driving mechanism 150 works alone, the position of the first lens 130 changes, so that focusing of the camera module is achieved.

In one embodiment, the camera module may include a sliding rail, where the sliding rail is connected to the first lens barrel 120, and the first lens 130 is provided with a protrusion, and the protrusion may be slidably matched with the sliding rail. The bulge and the sliding rail are in sliding fit and can be worn due to friction, so that the fit precision is reduced, and the focusing precision of the camera module is obviously reduced. In addition, the sliding rail always occupies part of the space in the camera module, which is unfavorable for the structural design of the camera module. Further, the first lens 130 is easily damaged by pressing, collision, or the like. Therefore, in another embodiment, the camera module may further include a first elastic member 160, and the first lens 130 is connected to the first lens barrel 120 through the first elastic member 160. Alternatively, the first elastic member 160 may be a spring structure. Under the action of external force, the first elastic member 160 moves the first lens 130 in the direction approaching the photosensitive chip. When external forces such as pressing, collision, etc. act on the first lens 130, the first elastic member 160 may absorb the external forces, so that the first lens 130 is prevented from being damaged due to the external forces directly acting on the first lens 130. In addition, the first lens 130 can move along the direction close to the photosensitive chip under the action of the elastic force of the first elastic member 160, and after the external force disappears, the first lens 130 can be automatically reset, so that the first lens 130 is prevented from being reset by the action force formed between the driving coil 152 and the driving magnet 151, and the power consumption of the electronic device is reduced. Furthermore, the first elastic member 160 has better flexibility, so that the focusing accuracy of the camera module is not significantly reduced due to friction between the first lens 130 and the first elastic member 160. In addition, since the first elastic member 160 has scalability, the first elastic member 160 does not always occupy a larger internal space of the camera module, which is beneficial to structural design of the camera module.

In an alternative embodiment, the camera module may further include a first lens support 170, where the first lens support 170 is connected to the first lens barrel 120 through the first elastic member 160, and a gap is formed between the first lens support 170 and the first lens barrel 120, and the first lens 130 is disposed on the first lens support 170. The first elastic member 160 may include an elastic portion 163, and the first lens holder 170 is connected to the first barrel 120 through the elastic portion 163. Since the elastic portion 163 is deformed when being stressed, the connection between the first lens bracket 170 and the first lens 130 directly via the elastic portion 163 may result in poor connection reliability of the first elastic member 160. Thus, in another alternative embodiment, the first lens support 170 has a first surface facing the photosensitive chip, and the first lens barrel 120 has a second surface facing the photosensitive chip. The first elastic member 160 may further include a first connection portion 161 and a second connection portion 162, the first connection portion 161 being connected to the second connection portion 162 through the elastic portion 163, the first connection portion 161 being attached to the first surface, and the second connection portion 162 being attached to the second surface. The connection area of the elastic part 163 and the first lens holder 170 can be increased by the first connection part 161, and the connection area of the elastic part 163 and the first barrel 120 can be increased by the second connection part 162 as well, so that the connection reliability of the first elastic member 160 can be improved.

In order to facilitate the placement of one of the driving magnet 151 and the driving coil 152, the outer surface of the first lens support 170 is provided with a first flange 171, one of the driving magnet 151 and the driving coil 152 is disposed on the first flange 171, and the first connecting portion 161 is attached to a side of the first flange 171 facing away from the driving magnet 151 or the driving coil 152. On the one hand, the driving magnet 151 or the driving coil 152 can be more conveniently arranged by adding the first flange 171, and on the other hand, the connection area between the first lens bracket 170 and the first elastic member 160 can be further increased by the first flange 171, which is beneficial to improving the connection reliability.

In order to facilitate the placement of the other of the driving magnet 151 and the driving coil 152, the first barrel 120 is provided with a second flange 122, the second flange 122 is opposite to the first flange 171, the other of the driving magnet 151 and the driving coil 152 is disposed on the second flange 122, and the second connecting portion 162 is attached to a side of the second flange 122 facing away from the driving coil 152 or the driving magnet 151. On the one hand, the driving coil 152 or the driving magnet 151 can be more conveniently arranged by adding the second flange 122, and on the other hand, the connection area of the first lens barrel 120 and the first elastic member 160 can be further increased by the second flange 122, so that the connection reliability is improved.

In one embodiment, the first lens support 170 is provided with the driving coil 152, the camera module may further include a circuit board and an electrical connector 180, the photosensitive chip is disposed on the circuit board, the circuit board is disposed on the base 110, and the circuit board is connected to the driving coil 152 through the electrical connector 180. In this embodiment, the force generated between the driving coil 152 and the driving magnet 151 drives the first lens frame 170 to move along the first direction, and at the same time, the electrical connector 180 connected to the driving coil 152 also moves along with the driving coil 152, and the electrical connector 180 is easy to collide with other components in the camera module while moving. To solve this problem, the first barrel 120 is provided with a driving coil 152. When the force generated between the driving coil 152 and the driving magnet 151 drives the first lens support 170 to move along the first direction, the electrical connector 180 cannot move, so that the electrical connector 180 can be prevented from colliding with other components in the camera module. Alternatively, the electrical connection 180 may be an electrical connection wire.

In an alternative embodiment, electrical connector 180 is a flexible electrical connector. In order to achieve the movement of the first barrel 120, the length of the electrical connector 180 may be long, and thus, when the electrical connector 180 moves following the first barrel 120, the electrical connector 180 is easily entangled with other components within the camera module. To avoid this, the electrical connector 180 is a resilient electrical connector. Because the electrical connector 180 has elasticity, the electrical connector 180 stretches and contracts when moving along with the first lens barrel 120, so that the electrical connector 180 and other components in the camera module can be prevented from being wound.

If the electrical connector 180 is freely disposed in the camera module, it is prone to collision with other components within the camera module. Thus, in an alternative embodiment, the camera module may further include a harness structure 190, where the harness structure 190 is disposed in the camera module, and where the harness structure 190 is provided with a receiving space, and at least a portion of the electrical connector 180 is located in the receiving space. The wire harness structure 190 can limit the position of the electrical connector 180, so that the electrical connector 180 is disposed in the accommodating space to avoid collision with other components in the camera module.

In one embodiment, the wire harness structure 190 is provided with a through hole, and the electrical connector 180 is disposed through the through hole. The weight of the harness structure 190 in this embodiment is large, which is disadvantageous for the lightweight design of the electronic device. Therefore, in another embodiment, the wire harness structure 190 is connected to the inner wall surface of the first barrel 120 to form the accommodation space. By forming the accommodating space between the wire harness structure 190 and the inner wall surface of the first barrel 120, the weight of the wire harness structure 190 can be reduced, which is beneficial to the lightweight design of the electronic device.

In an alternative embodiment, the wire harness structure 190 may include a first segment 191 and a second segment 192 directly connected, the first segment 191 and the second segment 192 being connected to the inner wall surface, respectively, to form a V-shaped structure. The accommodating space formed by the two sections and the inner wall surface is smaller, so that friction is easy to occur between the two sections and the inner wall of the accommodating space when the electric connector 180 stretches and contracts, and the stretching and the contracting of the electric connector 180 are not facilitated. Thus, in another alternative embodiment, the wire harness structure 190 may further include a first segment 191, a second segment 192, and a third segment 193 connected in sequence, where the first segment 191 and the third segment 193 are opposite and connected to the inner wall surface, respectively. The first, second and third sections 191, 192 and 193 may form a large receiving space with the inner wall surface to facilitate the expansion and contraction of the electrical connector 180.

The embodiment of the application also provides electronic equipment, which comprises the camera module in any embodiment. The electronic device disclosed by the embodiment of the application can be a smart phone, a tablet personal computer, an electronic book reader, a wearable device (such as a smart watch), an electronic game machine and the like, and the embodiment of the application is not limited to the specific type of the electronic device.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. The utility model provides a camera module, its characterized in that includes base, sensitization chip, first lens cone, first lens, first actuating mechanism and second actuating mechanism, wherein:

2. The camera module of claim 1, further comprising a first elastic member, wherein the first lens is connected to the first barrel through the first elastic member;

under the condition that the first lens is subjected to external force, the first elastic piece enables the first lens to move along the direction approaching to the photosensitive chip.

3. The camera module of claim 2, further comprising a first lens mount connected to the first barrel by the first elastic member, the first lens mount having a gap therebetween, the first lens being disposed on the first lens mount, the first lens mount having a first surface facing the photosensitive chip, the first barrel having a second surface facing the photosensitive chip;

the first elastic piece comprises a first connecting part, a second connecting part and an elastic part, wherein the first connecting part is connected with the second connecting part through the elastic part, the first connecting part is attached to the first surface, and the second connecting part is attached to the second surface.

4. The camera module of claim 3, wherein the outer surface of the first lens support is provided with a first flange, one of the driving magnet and the driving coil is disposed on the first flange, and the first connecting portion is attached to a side of the first flange facing away from the driving magnet or the driving coil.

5. The camera module according to claim 4, wherein the first lens barrel is provided with a second flange, the second flange is opposite to the first flange, the other one of the driving magnet and the driving coil is disposed on the second flange, and the second connecting portion is attached to a side of the second flange facing away from the driving coil or the driving magnet.

6. The camera module of claim 1, wherein the first lens barrel is provided with the driving coil, the camera module further comprises a circuit board and an electrical connector, the photosensitive chip is arranged on the circuit board, the circuit board is arranged on the base, and the circuit board is connected with the driving coil through the electrical connector.

7. The camera module of claim 6, wherein the electrical connector is a resilient electrical connector.

8. The camera module of claim 6, further comprising a harness structure disposed within the camera module, the harness structure having a receiving space, at least a portion of the electrical connector being located within the receiving space.

9. The camera module of claim 8, wherein the harness structure is connected to an inner wall surface of the first barrel to form the accommodation space.

10. The camera module of claim 9, wherein the wire harness structure comprises a first section, a second section and a third section connected in sequence, the first section and the third section being opposite and connected to the inner wall surface respectively.

11. An electronic device comprising the camera module of any one of claims 1-10.