Patent Description:
A horizontal dimension (vertical to an optical axis direction) of a long-focus lens of a current light and thin mobile terminal device such as a mobile phone or a tablet computer usually depends on a forefront lens group. To be light and thin, the long-focus lens is usually in a periscope folding structure. Therefore, the horizontal dimension of the lens determines a module height. However, because the mobile terminal such as the mobile phone or the tablet computer is affected by a thickness, the module height is greatly affected. The module height is strongly correlated with an aperture value of a lens. To be specific, the module height determines a diameter of a lens on a light injection side of a module. A larger diameter of the lens on the light injection side of the module indicates a smaller aperture value of the lens. The aperture value of the lens directly affects photographing quality, such as resolution or a low-illumination imaging capability. A smaller aperture value indicates better photographing quality. However, when the module height is limited and the module cannot be made larger, a diameter of a first lens is limited. Consequently, an aperture value of the lens cannot be smaller, greatly affecting imaging quality.

<CIT> discloses a thin lens module that has a case, in which an optical lens set, an image sensor, a focusing driving device, two position indicators, a zooming driving device, a shutter, and a shutter driving device are provided. An optical axis of the optical lens set has a first optical axis section and a second optical axis section, and the first optical axis section is perpendicular to an object side. The focusing driving device, the position indicators, and the shutter driving device respectively connects to joints for signal transmission, and these joints are provided on a side of the case parallel to the first optical axis section to achieve the thinning purpose.

<CIT> discloses a lens unit used for a cellular phone with a camera, the lens unit comprises a lens and a lens holder. The lens has three or more projections, and the lens holder has three notch parts at positions corresponding to the respective projections of the lens for inserting the respective projections. Thus the lens unit can be miniaturized.

<CIT> discloses an electronic device includes a housing and a camera module, the camera module is arranged to correspond to light guiding holes formed on the housing for facilitating 3D photography. The camera module includes a number of camera assembles, and each of the camera assembles includes a shield, a lens supporting unit, a lens unit, an optical sensor, and at least one electromagnetic driving unit. As a result, the duration of an exposure for producing 3D images using the camera module can be increased, and the image quality in dim surroundings is improved.

<CIT> discloses a lens unit applicable to a small-sized imaging apparatus suitable for portable use. The lens unit comprises a lens holder and at least one lenses in the lens holder. The lens holder is a shape in which a part of an approximately cylindrical shape is removed in order to achieve thinning, and a metal thin plate is arranged so as to cover a gap of the lens holder caused by the shape. By forming the metal thin plate in the gap, the lens holder can suppress the deterioration of the strength of the inner lens.

<CIT> discloses an imaging device comprising: a lens barrel that holds at least one optical element; a light-receiving circuit that at least has an image sensor that obtains an image of a photographic subject formed by the optical element, and a drive substrate that drives the image sensor; and a welding structure in which the lens barrel and the optical element are joined by welding.

<CIT> discloses an image sensing device comprising a substrate having an image sensing element, and an optical member, where the optical member comprises a lens member, and a lens support member which has a support for supporting the lens member. The image sensing element includes an image sensing region and an image non-sensing region, and the lens support member is arranged to abut against the image non-sensing region of the image sensing element.

The object of the present invention is to provide a mobile terminal with a periscope lens module to resolve a prior-art problem of relatively low photographing imaging quality. This object is solved by the attached independent claim <NUM> and further embodiments and improvements of the invention are listed in the attached dependent claims.

According to a first aspect according to the invention, this invention provides mobile terminal with a periscope lens module of a mobile terminal, where the module includes a motor housing and a lens, and the lens is located in the motor housing; and
the lens includes an enclosure, a first lens, and a plurality of second lenses, where the enclosure includes a first cylinder and a second cylinder connected to the first cylinder, a diameter of the first cylinder is greater than a diameter of the second cylinder, at least one gap penetrating a sidewall of the first cylinder is disposed on the sidewall, the first lens is fastened in the first cylinder, the plurality of second lenses are fastened in the second cylinder, and the first lens, the plurality of second lenses, the first cylinder, and the second cylinder are coaxially disposed.

In the foregoing implementation solution, the at least one penetrating gap is disposed on the sidewall of the first cylinder, and when the gap is being formed, a part is cut from the arc sidewall of the first cylinder. Therefore, a distance from the first lens to the gap is less than a distance from the first lens to the arc sidewall of the first cylinder. When the lens module is disposed in the mobile terminal, a thickness dimension of the mobile terminal affects a diameter of the first lens. Therefore, when the lens module is being disposed, the gap is made to face a rear housing of the mobile terminal, so that the diameter of the first lens can be increased, thereby reducing an aperture value of the lens module and improving imaging quality.

In a specific implementation solution, there are two gaps, and the two gaps are symmetrically disposed on the first cylinder. By using the two symmetrical gaps, space for accommodating the first lens is further expanded, so that the diameter of the first lens can be further increased, thereby improving the imaging quality.

According to the invention, an edge that is of each gap and that is located on an outside of the first cylinder is set to a cutting surface. To be specific, a plane is formed by further cutting a part from a position in which the gap is located on the sidewall of the first cylinder, so that the space for accommodating the first lens can be further expanded, thereby increasing the diameter of the first lens and improving the imaging quality.

According to the invention, a distance from a center of the first lens to the cutting surface is not less than a radius of the first lens.

This prevents the first lens from protruding from the first cylinder, and ensures that the first cylinder can protect the first lens.

In a specific implementation solution, the module further includes a first fastener, where the first fastener is embedded in the second cylinder and is used to fasten the first lens. The first lens is fastened by using the first fastener. When the first fastener is specifically disposed, the first fastener is circular, and a chamfer is disposed at an end that is of the first fastener and that is far away from the first lens, so that the first fastener is inserted into the second cylinder.

In a specific implementation solution, the module further includes at least one second fastener, and the at least one second fastener is one-to-one correspondingly inserted into the at least one gap and is used to fasten the first lens. The first lens is fastened by using the second fastener.

In a specific implementation solution, when the first lens is fastened by using the first fastener and the second fastener, the first fastener, the second fastener, and the first lens are disposed in an integrated structure.

In a specific implementation solution, each gap is a convex-shape gap, and an end that is of the gap and that has a smaller opening is close to the second cylinder. This is convenient to insert the second fastener into the gap.

According to the invention, a mobile terminal is provided, where the mobile terminal includes a mobile terminal body and the periscope lens module of the mobile terminal according to any one of the foregoing implementation solutions, where the periscope lens module is disposed in the mobile terminal.

According to the invention, a lens assembly is provided and the lens assembly includes an enclosure, a first lens, and a plurality of second lenses, where the enclosure includes a first cylinder and a second cylinder connected to the first cylinder, a diameter of the first cylinder is greater than a diameter of the second cylinder, at least one gap penetrating a sidewall of the first cylinder is disposed on the sidewall, the first lens is fastened in the first cylinder, the plurality of second lenses are fastened in the second cylinder, and the first lens, the plurality of second lenses, the first cylinder, and the second cylinder are coaxially disposed.

In a specific implementation solution, there are two gaps, and the two gaps are symmetrically disposed on the first cylinder.

According to the invention, an edge that is of each gap and that is located on an outside of the first cylinder is set to a cutting surface.

In a specific implementation solution, the module further includes a first fastener, where the first fastener is embedded in the second cylinder and is used to fasten the first lens.

In a specific implementation solution, the module further includes at least one second fastener, and the at least one second fastener is one-to-one correspondingly inserted into the at least one gap and is used to fasten the first lens.

In a specific implementation solution, each gap is a convex-shape gap, and an end that is of the gap and that has a smaller opening is close to the second cylinder.

In a specific implementation solution, the lens is arranged in a width direction of the mobile terminal.

In a specific implementation solution, one of the sidewall gap is parallel to a rear housing of the mobile terminal.

According to the invention, the mobile terminal includes a mobile terminal body and the lens according to any one of the foregoing implementation solutions, where the lens is disposed in the mobile terminal.

In the invention, the at least one penetrating gap is disposed on the sidewall of the first cylinder, and when the gap is being formed, a part is cut from the arc sidewall of the first cylinder. Therefore, a distance from the first lens to the gap is less than a distance from the first lens to the arc sidewall of the first cylinder. When the lens module is disposed in the mobile terminal, a thickness dimension of the mobile terminal affects a diameter of the first lens. Therefore, when the lens module is being disposed, the gap is made to face a rear housing of the mobile terminal, so that the diameter of the first lens can be increased, thereby reducing an aperture value of the lens module and improving imaging quality.

For ease of understanding the technical solutions in the embodiments, the following first describes a periscope lens module with reference to the accompanying drawings.

<FIG> is a structural conceptual diagram of a lens module. A structure of the lens module includes a reflecting prism <NUM> or a reflector <NUM>, a lens <NUM>, a light filter <NUM>, an image sensor <NUM>, a signal processing module <NUM>, and a display module <NUM>. An imaging principle of the lens module is as follows: An imaging light ray <NUM> is reflected by the reflecting prism <NUM> or the reflector <NUM> (the reflecting prism <NUM> and the reflector <NUM> have a same function) to the lens <NUM>. The lens <NUM> has a convergence imaging effect on the light ray <NUM>, an unnecessary light wave (for example, a light wave other than visible light) in the light ray <NUM> is filtered by the light filter <NUM>, and finally light waves other than the unnecessary light wave in the light ray <NUM> are converged on the image sensor <NUM>. The signal processing module <NUM> controls the image sensor <NUM> to perform optical-to-electrical conversion on a collected optical signal, to obtain an electrical signal, and the processed electrical signal is transmitted to the display module <NUM> for display.

In addition to the foregoing hardware, the lens module further includes: a focus motor, configured to adjust a lens position to photograph objects at different distances; a stabilization motor, configured to adjust a lens position, so that an image of a photographed object does not blur due to a shake of a user's hand, or the like; and a system control apparatus, including a photographing control unit, configured to set a photographing mode, for example, a black and white mode or a high dynamic mode; a focus control unit, configured to control the focus motor to implement automatic focus; and a stabilization control unit, configured to control the stabilization motor to stably take a photograph. The focus motor, the stabilization motor, the system control apparatus, and the like have similar functions to those in a lens module in a mobile terminal in the prior art, and details are not described herein.

During specific use, details are shown in <FIG> is a schematic diagram of cooperation between the lens module and a mobile terminal. The lens module is transversely disposed in the mobile terminal, to be specific, the reflecting prism <NUM> or a reflector <NUM>, the lens <NUM>, and the filter <NUM> (in a propagation direction of the light ray in the imaging lens module) are arranged in a width direction of the mobile terminal. In addition, during specific disposition, a motor (the focus motor) housing <NUM> is fastened in the mobile terminal, and there is a specific focus adjustment spacing between the lens <NUM> and the motor housing <NUM>. An aperture value of the lens module directly affects photographing quality such as resolution or a low-illumination imaging capability, and the aperture value depends on a diameter of a lens located at a front end of the lens module. Therefore, in this application, the lens in the lens module is improved, to improve imaging quality.

Specifically, in this application, a structure of a lens in a periscope lens module is improved. When the lens is specifically disposed, the lens is disposed in a motor (focus motor) housing. The lens includes an enclosure, a first lens <NUM>, and a plurality of second lenses. Specifically, as shown in <FIG>, the enclosure includes a first cylinder <NUM> with a larger diameter and a second cylinder <NUM> with a smaller diameter, and the first cylinder <NUM> and the second cylinder <NUM> are connected and coaxially disposed. The first lens <NUM> is disposed in the first cylinder <NUM> with the larger diameter, the plurality of second lenses are disposed in the second cylinder <NUM>, and the first lens <NUM> and the plurality of second lenses are coaxially disposed. The first lens <NUM> is a lens on a light injection side, to be specific, the first lens <NUM> receives a reflected light ray <NUM> and then propagates the reflected light ray <NUM> to the second lenses. Also referring to <FIG> and <FIG>, when the first lens <NUM> is used as the lens on the light injection side, an aperture value depends on a size of the first lens <NUM>. A larger diameter of the first lens <NUM> indicates a smaller aperture value and better imaging quality. Therefore, to increase a diameter of the first lens <NUM>, space in the motor housing needs to be used to a maximum extent. In this application, to increase the diameter of the first lens <NUM>, at least one gap <NUM> penetrating the first cylinder <NUM> is disposed on a sidewall of the first cylinder <NUM>. The gap <NUM> is a gap formed by cutting a part from the sidewall of the first cylinder <NUM>. Therefore, a distance from a center of the first lens <NUM> to a position with a gap on an outer sidewall of the first cylinder <NUM> is less than a distance from the center of the first lens <NUM> to a position without a gap on the outer sidewall of the first cylinder <NUM>. Also referring to <FIG>, when a lens is specifically disposed, a gap faces a thickness direction of the mobile terminal. Therefore, in the foregoing manner in which the gap is used, it is equivalent that a dimension of the first cylinder <NUM> in the thickness direction of the mobile terminal is reduced. The dimension in the thickness direction of the mobile terminal is a main dimension limiting a size of the first cylinder <NUM>. Therefore, after the gap reduces the dimension of the first cylinder <NUM> in the thickness direction of the mobile terminal, the first cylinder <NUM> can be made larger in dimension, and then the first lens <NUM> can be made larger.

For ease of understanding the principle of the lens module provided in this application, the following describes the principle of the lens module in detail with reference to <FIG>. The invention is illustrated by the descriptions of <FIG> and the dimensioning is in particular shown in <FIG> is a schematic diagram of comparison between a lens module in this application and a lens module in the prior art that are disposed in a mobile terminal. A lens module on the left side is the lens module in this application, and only one gap <NUM> is used on a first cylinder <NUM> of the lens module. A lens module on the right side is a lens module in which no gap is disposed on a first cylinder. Two horizontal lines in the figure are two parallel auxiliary lines, and the two auxiliary lines are used to help understand width dimensions occupied by the lens modules in a thickness direction of the mobile terminal. The two parallel lines each are tangent to the two cylinders, and a distance c between the two parallel lines is widths occupied by the two different lens modules in the thickness direction of the mobile terminal. It can be intuitively seen from <FIG> that, in the lens module in this application, c = diameter d of the first lens + one sidewall thickness e of the first cylinder <NUM> + distance f from a sidewall of the first lens to the gap <NUM>. In the lens module on the right side, c = lens diameter D + sidewall thickness E of the cylinder × <NUM>. When the sidewall thickness of the first cylinder <NUM> in this application is the same as the sidewall thickness of the cylinder on the right side, because the gap <NUM> is formed by cutting a partial structure from a sidewall of the first cylinder <NUM>, f < E. In this case, when the value c (namely, the width occupied by the lens in the thickness direction of the mobile terminal) is unchanged, the diameter d of the first lens <NUM> in this application can be greater than a value of the diameter D of a first lens on the right side. Therefore, in the technical solutions provided in this application, the first cylinder <NUM> is in a form of a non-circular symmetrical structure, so that the diameter of the first lens <NUM> can be effectively increased. In this way, interior space of a motor housing is fully used, a lens aperture value is reduced, lens optical performance is improved, and photographing experience is improved.

To describe in detail a gap disposition case in this application, the following describes in detail the gap disposition case with reference to specific accompanying drawings and specific embodiments.

As shown in <FIG>, in this embodiment, there are two gaps <NUM>, and the two gaps <NUM> are symmetrically disposed on a first cylinder <NUM>. During specific disposition, the two gaps are formed by cutting a partial cylinder wall from the first cylinder <NUM>. Therefore, when a lens is disposed in a mobile terminal, the two gaps are parallel to a rear housing of the mobile terminal. Also referring to <FIG>, in the foregoing disposition manner, a diameter d of a first lens <NUM> may be increased by <NUM> × (e - f) compared with a diameter of a first lens in a lens module without a gap.

As a limit, f = <NUM>. In this case, diameter d of the first lens <NUM> = c. In this case, a circumferential surface of the first lens <NUM> is flush with a plane on which two tips formed by a gap sidewall and an outer sidewall of the first cylinder <NUM> are located, to further reduce an aperture value and improve an imaging effect.

In addition, it should be understood that, in this embodiment, a quantity of gaps <NUM> is not limited only to two, but may be any quantity of gaps <NUM>, for example, four or six. <FIG> shows a case of four gaps <NUM>. When a plurality of gaps <NUM> are used, it is convenient to fasten a lens module when the lens module is placed in the mobile terminal, provided that any two opposite gaps <NUM> can be used to cooperate with the mobile terminal.

When a gap is disposed on a sidewall of the first cylinder <NUM>, the first cylinder <NUM> forms non-circular space. When the first lens <NUM> is disposed in the first cylinder <NUM>, an eccentricity occurs due to a processing error and an assembly error. To ensure installation precision of the first lens <NUM>, preferably, referring to <FIG>, a lens module further includes a first fastener <NUM>. The first fastener <NUM> is embedded in a second cylinder <NUM> and is used to fasten the first lens <NUM>. To be specific, when the first lens <NUM> is placed in the first cylinder <NUM>, a side that is of the first lens <NUM> and that faces the second cylinder <NUM> is connected to the first fastener <NUM>. The first fastener <NUM> is clamped in the second cylinder <NUM> and is used to fasten the first lens <NUM>. Because a sidewall of the second cylinder <NUM> is a complete cylindrical sidewall, when the first fastener <NUM> is inserted, the first lens <NUM> can be stably fastened, and installation precision of the first lens <NUM> can be ensured, to avoid an eccentricity. In addition, for ease of installation, in a specific solution, the first fastener <NUM> is circular, and a chamfer is disposed at an end that is of the first fastener <NUM> and that is far away from the first lens <NUM>. By using the chamfer structure, the first fastener <NUM> can be conveniently inserted into the second cylinder <NUM>.

In addition, when the first fastener <NUM> is specifically disposed, the first fastener <NUM> and the first lens <NUM> are formed in an integrated forming manner. This ensures stability of a connection between the first lens <NUM> and the first fastener <NUM>, and also ensures relative precision between the first lens <NUM> and the first fastener <NUM>.

As shown in <FIG>, an edge that is of each gap <NUM> provided in this embodiment of this application and that is located on an outside of a first cylinder <NUM> is set to a cutting surface <NUM>. In other words, each gap <NUM> corresponds to one cutting surface <NUM>. A gap <NUM> and a cutting surface <NUM> corresponding to the gap <NUM> are used as an example. It may be understood that the cutting surface <NUM> is formed by cutting a part from a sidewall of the first cylinder <NUM>, and then the gap <NUM> is set up on the cutting surface <NUM>, where the gap <NUM> is connected to a hollow part of the first cylinder <NUM>. Alternatively, it may be understood that the gap <NUM> is set up on a sidewall of the first cylinder <NUM>, and then the cutting surface <NUM> is formed by cutting a part from the sidewall of the first cylinder <NUM>, where the cutting is performed along the gap <NUM>. In this way, a one-to-one correspondence between the gaps <NUM> and the cutting surfaces <NUM> is formed.

During specific disposition, a distance from a center of a first lens <NUM> to the cutting surface <NUM> is not less than a radius of the first lens <NUM>, to ensure that the first lens <NUM> is always located in the first cylinder <NUM> and does not protrude from the first cylinder <NUM>, so as to ensure security of the first lens <NUM>. As shown in <FIG>, in a specific implementation solution, in an extreme case, the distance from the center of the first lens <NUM> to the cutting surface <NUM> is equal to the radius of the first lens <NUM>. In this case, each cutting surface <NUM> is a tangent plane of the first lens <NUM>. In this structure, space in a motor housing can be used to a maximum extent, in other words, the diameter of the first lens <NUM> is maximized, to reduce an aperture value and improve an imaging effect.

It should be understood that, regardless of which of the foregoing solutions is used, during specific disposition, the gap <NUM> may be further used as a structure used to fasten the first lens <NUM>. During specific disposition, as shown in <FIG>, a lens module further includes at least one second fastener <NUM>, and the at least one second fastener <NUM> is one-to-one correspondingly inserted into at least one gap <NUM> and is used to fasten the first lens <NUM>. During assembly, the first lens <NUM> is inserted in an opening direction of the gap <NUM>. During insertion, the second fastener <NUM> disposed on the first lens <NUM> cooperates with the gap <NUM> to fasten the first lens. During specific disposition, for ease of fastening the first lens <NUM>, structures of the second fastener <NUM> and the gap <NUM> that are in cooperation may be improved. For example, in a specific implementation solution, a chamfer is disposed on a side that is of the second fastener <NUM> and that faces the gap <NUM>, or a chamfer is correspondingly disposed on the gap <NUM>, so that the second fastener <NUM> is inserted into the gap <NUM>. In addition, to avoid a case in which in a process of inserting the first lens <NUM>, it is difficult to assemble due to a long friction distance between the gap <NUM> and the second fastener <NUM>, in another specific implementation solution, a stepped gap <NUM> may be used as the gap <NUM>. As shown in <FIG>, each gap <NUM> is a convex-shape gap. Specifically, a shape of the gap <NUM> is a "convex" shape, but a boundary of the "convex" shape is not strictly limited. As shown in <FIG>, an opening is formed at an end, of the gap <NUM>, on a light injection side of the first cylinder <NUM>, and an end that is of the gap <NUM> and that has a smaller opening is close to a second cylinder <NUM>. In other words, the gap has a larger opening at an end of the first cylinder <NUM>, and the gap has a smaller opening at an end close to the second cylinder <NUM>, and the second fastener <NUM> is used to cooperate with the end that is of the gap and that has the smaller opening. When the first lens <NUM> is inserted, there is a sufficient spacing between an end that is of the gap and that has the larger opening and the second fastener <NUM> to place the first lens <NUM> in the first cylinder <NUM>. The first lens <NUM> is clamped to the gap only in a last position, namely, a position in which the first lens <NUM> needs to be fastened. This facilitates installation of components.

In addition to the second fastener <NUM>, the first lens <NUM> provided in this embodiment may be fastened by using the first fastener <NUM> mentioned in Embodiment <NUM>. In other words, in this embodiment, the first lens <NUM> may be fastened through cooperation between the second fastener <NUM> and the gap <NUM>, or the first lens <NUM> may be fastened through cooperation between the first fastener <NUM> and the second cylinder <NUM>. Regardless of which of the foregoing fastening manners is used, the first lens <NUM> can be fastened, and installation precision of the first lens <NUM> can be ensured. In a specific implementation solution, to ensure the precision, preferably, both the first fastener <NUM> and the second fastener <NUM> are disposed on the first lens <NUM>. Therefore, the precision can be effectively improved.

In addition, when the second fastener <NUM> is specifically disposed, the second fastener <NUM> and the first lens <NUM> are formed in an integrated forming manner. This ensures stability of a connection between the first lens <NUM> and the second fastener, and also ensures relative precision between the first lens <NUM> and the second fastener. Likewise, when the first fastener <NUM> and the second fastener <NUM> are used, the first fastener <NUM>, the second fastener <NUM>, and the first lens <NUM> are also formed in an integrated forming structure manner.

For ease of understanding an effect of the lens module provided in this embodiment, a long-focus lens provided in this embodiment is compared with a long-focus lens in the prior art. In this embodiment, focal length f of the long-focus lens = <NUM>, a wall thickness of the first cylinder <NUM> is <NUM>, and a thickness of the lens module (including the first lens <NUM> and the first cylinder <NUM>) is <NUM>. When the solution in this application is used, a lens cone may not occupy a dimension in a module height direction (a thickness direction of a mobile terminal), and lens aperture value F = <NUM>. A lens module in the prior art is in a circular symmetrical structure, and lens aperture value F > <NUM>. Therefore, in the lens module structure in this application, namely, in a non-circular symmetrical structure, a module height can be fully used to minimize a lens aperture value, improve lens optical performance, and improve photographing experience.

It can be learned from the descriptions in Embodiment <NUM> and Embodiment <NUM> that, in the lens module provided in the embodiments of this application, a structure of the first cylinder <NUM> is improved, and then the diameter of the first lens <NUM> is increased, so that the aperture value is reduced, and the imaging effect is improved.

In addition, an embodiment of this application further provides a mobile terminal. The mobile terminal includes a mobile terminal body and the foregoing periscope lens module disposed in the mobile terminal.

The mobile terminal may be a common mobile terminal such as a mobile phone or a tablet computer. This is not limited herein. In the mobile terminal, a lens module used in the mobile terminal is the lens module in the foregoing embodiments. At least one penetrating gap is disposed on a sidewall of a first cylinder, and when the gap is being formed, a part is cut from the arc sidewall of the first cylinder. Therefore, a distance from a first lens to the gap is less than a distance from the first lens to the arc sidewall of the first cylinder. When the lens module is disposed in the mobile terminal, a thickness dimension of the mobile terminal affects a diameter of the first lens. Therefore, when the lens module is being disposed, the gap is made to face a rear housing of the mobile terminal, so that the diameter of the first lens can be increased, thereby reducing an aperture value of the lens module and improving imaging quality.

Claim 1:
A mobile terminal with a periscope lens module, wherein the periscope lens module comprises a lens assembly, wherein the lens assembly comprises an enclosure (<NUM>), a first lens (<NUM>), and a plurality of second lenses, wherein the enclosure comprises a first cylinder (<NUM>) and a second cylinder (<NUM>) connected to the first cylinder (<NUM>), a diameter of the first cylinder (<NUM>) is greater than a diameter of the second cylinder (<NUM>), at least one gap (<NUM>) penetrating the first cylinder (<NUM>) is disposed on a sidewall of the first cylinder (<NUM>), wherein an edge that is of each gap and that is located on an outside of the first cylinder (<NUM>) is set to a cutting surface (<NUM>), and a distance from a center of the first lens to the cutting surface of the first lens is less than d+e, wherein d is the radius of the first lens and e is the sidewall thickness of the first cylinder;
wherein the distance from the center of the first lens (<NUM>) to the cutting surface (<NUM>) is not less than the radius of the first lens (<NUM>); and
the first lens (<NUM>) is fastened in the first cylinder (<NUM>), the plurality of second lenses are fastened in the second cylinder (<NUM>), and the first lens (<NUM>), the plurality of second lenses, the first cylinder (<NUM>), and the second cylinder (<NUM>) are coaxially disposed; wherein one of the at least one gap (<NUM>) faces to a rear housing of the mobile terminal.