Reflection assembly, periscopic camera module and assembling method thereof

Abstract

The invention discloses a reflection assembly, a periscopic camera module and an assembling method thereof, the reflection assembly comprises a reflection element and a carrier, the carrier is composed of a main body part and side wall parts extending upwards from the two sides of the main body part, an inclined bearing surface is arranged at the edge of the top side of each side wall part and is used for providing bearing for the reflection element, and the inclined bearing surface is used for bearing the reflection element. The glue box is characterized in that a glue groove is formed in the inner side of the side wall part, a transverse glue groove and a vertical glue groove are sequentially formed in the glue groove downwards along the edge of the top side, the transverse glue groove is in a step shape and comprises a deep groove and a shallow groove, and the shallow groove is formed in the relatively narrow inner surface of the side wall part along the edge of the top side. The deep groove is arranged on the inner surface, which is relatively deeper along the top side edge, of the side wall part. Therefore, the glue filling path is controlled through the deep groove and the shallow groove, the glue layer distribution uniformity and the bonding strength are effectively improved, and the problems of glue overflow and stress concentration in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the optoelectronic field, and in particular, to a reflection component, a periscope camera module, and an assembly method thereof. Background Art

[0002] With the development of mobile device camera modules towards high pixel and miniaturization, the periscope structure is widely used in the field of telephoto cameras due to its unique optical path folding advantage. In traditional periscope modules, the assembly of reflection elements mainly adopts mechanical height fixing assembly or active optical alignment technology. Among them, mechanical height fixing assembly relies on mechanical structures to fix reflection elements. Although it can ensure basic positioning accuracy, it is necessary to increase the size of the motor to compensate for assembly deviations, resulting in difficulty in compressing the size of the module, and the accumulation of tolerances easily causes the field of view angle to shift and the MTF performance to decline. While the active optical alignment technology can improve the optical alignment accuracy through multi-degree-of-freedom calibration, it is necessary to increase the assembly gap between the reflection element and the carrier, resulting in insufficient effective contact area of the adhesive glue, and there is a risk of easy cracking of the glue layer and element detachment. In addition, the glue overflow problem caused by the large gap easily contaminates the reflection surface with glue, and the surface shape distortion caused by the curing stress seriously restricts the imaging quality. Summary of the Invention

[0003] The present application aims to provide a reflection component, a periscope camera module, and an assembly method thereof. By optimizing the carrier glue groove design and glue overflow control scheme, the problems of insufficient bonding strength of the reflection element, high glue overflow risk, and imaging performance decline caused by the accumulation of assembly tolerances in the prior art are solved, and the reliability and optical calibration accuracy are improved while realizing the miniaturization of the camera module.

[0004] The present application discloses a reflection component of a periscope camera, including a reflection element and a carrier. The reflection element is supported on the carrier and is used for reflecting incident light. The carrier includes a main body portion and side wall portions. The side wall portions are disposed on both sides of the main body portion and extend upward from both sides of the main body portion. The side wall portions have a top side edge, and at least one supporting surface is formed on the main body portion and is inclined at an angle with respect to the top side edge for the reflection element to rest on. The inner surface of the side wall portion has a glue groove, and the glue groove sequentially forms a horizontal glue groove and a vertical glue groove downward along the top side edge. The horizontal glue groove extends along a direction parallel to the top side edge and is stepped, including a deep groove and a shallow groove. The shallow groove is close to the main body portion, and the deep groove is away from the main body portion. The vertical glue groove extends from the lower edge of the horizontal glue groove to the supporting surface.

[0005] In some preferred embodiments, a transition portion is further provided between the shallow groove and the deep groove, and the transition portion extends downward from the end of the shallow groove to the starting end of the deep groove.

[0006] In some preferred embodiments, the vertical glue groove includes a long vertical glue groove and a short vertical glue groove. The short vertical glue groove is disposed below the shallow groove, and the long vertical glue groove is disposed below the deep groove.

[0007] In some preferred embodiments, the long vertical glue groove extends downward from the deep groove to the middle of the side wall portion.

[0008] In some preferred embodiments, the lengths of the long vertical glue grooves are the same.

[0009] In some preferred embodiments, the total volume of the vertical glue grooves is smaller than the volume of the horizontal glue groove.

[0010] In some preferred embodiments, the length of the shallow groove is smaller than the length of the deep groove.

[0011] In some preferred embodiments, a glue-blocking structure is further provided on the bearing surface, and the glue-blocking structure is a long strip-shaped protrusion, which is respectively arranged on both side edges of the bearing surface.

[0012] In some preferred embodiments, the glue groove further includes an overflow glue groove, which is arranged between the main body portion and the side wall portion and is formed by further hollowing downward from the glue groove for accommodating the glue overflowing from the glue groove.

[0013] In some preferred embodiments, the overflow glue groove further includes an upper overflow glue groove and a lower overflow glue groove. The upper overflow glue groove is arranged below the vertical glue groove corresponding to the shallow groove, and the lower overflow glue groove is arranged obliquely downward along the extending direction of the bearing surface with respect to the upper overflow glue groove.

[0014] In some preferred embodiments, a first glue-blocking groove is arranged between the upper overflow glue groove and the lower overflow glue groove. The first glue-blocking groove extends obliquely from the upper overflow glue groove to the lower overflow glue groove and connects the upper overflow glue groove and the lower overflow glue groove.

[0015] In some preferred embodiments, a second glue-blocking groove is arranged between the lower overflow glue groove and the bottom end of the side wall portion. The second glue-blocking groove connects the lower overflow glue groove and extends downward.

[0016] The present application also discloses a periscope camera module, which includes any one of the reflection components mentioned in the above embodiments, at least one lens component and at least one photosensitive component.

[0017] The present application also discloses an assembling method for a reflection component, including the steps of: S1: Provide a reflection element, a carrier and a base, install the carrier on the base. The carrier includes a main body portion and side wall portions extending upward on both sides of the main body portion. The carrier has a bearing surface, and a horizontal glue groove and a vertical glue groove are sequentially formed downward along the inner surface of the side wall portion along the top side edge. The horizontal glue groove extends along a direction parallel to the top side edge and is in a stepped shape; S2: Pre-apply glue at the edge of the bearing surface of the carrier; S3: Install the reflection element on the carrier and expose the glue for pre-fixing; S4: Apply glue to the side of the reflection element. Inject the glue into the horizontal glue groove and wait for a period of time to allow the glue to seep down into the vertical glue groove, and then cure the glue to obtain the reflection assembly.

[0018] In some preferred embodiments, the method of pre-applying glue in step S2 is to apply glue to the four vertices of the bearing surface respectively, and a glue overflow groove is further hollowed out downward between the main body portion and the side wall portion for accommodating the glue overflowing during the implementation of step S2.

[0019] In some preferred embodiments, the method of pre-applying glue in step S2 is to apply glue on both sides of the bearing surface close to the side wall portion, and the glue extends in a strip shape parallel to the direction of the side wall portion.

[0020] Compared with the prior art, in some embodiments of the present application, a horizontal glue groove and a vertical glue groove are provided. The volume of the horizontal glue groove is equivalent to that of the vertical glue groove, so that a sufficient amount of glue can seep down into the vertical glue groove, greatly increasing the bonding area on the side of the reflection element and reducing the risk of the reflection element falling off due to insufficient bonding; in addition, in some embodiments of the present application, a glue overflow groove is also provided. After the glue overflows from the vertical glue groove, it can flow downward into the glue overflow groove to avoid the situation that the glue overflows onto the surface of the reflection element and causes the reflection element to mutate; finally, this design can also make there be enough gaps between the reflection element and the carrier, which can be used for multi-angle calibration of the position of the reflection element to compensate for the offset, and ultimately improve the imaging quality of the camera module. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application and do not limit the present application.

[0022] Figure 1 Schematic diagram of the installation of the reflection element and the carrier in the periscope camera module in some embodiments of the present application.

[0023] Figure 2 Schematic diagram of the combined state of the reflection element and the carrier in some embodiments of the present application.

[0024] Figure 3 Schematic diagram of the carrier in some embodiments of the present application.

[0025] Figure 4 Schematic diagram of the glue groove part in some embodiments of the present application.

[0026] Figure 5 Schematic diagram of the glue overflow groove part in some embodiments of the present application.

[0027] Figure 6 Schematic diagram of the reflection element part in some embodiments of the present application.

[0028] Figure 7 Schematic diagram of the glue-blocking structure part in some embodiments of the present application.

[0029] Figure 8 Schematic diagram of the long vertical glue groove part in some embodiments of the present application.

[0030] In the figure: 10, reflection assembly; 20, reflection driving device; 30, lens assembly; 40, lens driving assembly; 50, photosensitive assembly; 11, reflection element; 111, incident surface; 112, exit surface; 113, reflection surface; 12, carrier; 121, main body part; 1211, bearing surface; 122, side wall part; 1221, first side wall part; 12211, first retaining wall; 1222, second side wall part; 12212, second retaining wall; 123, glue groove; 1231, horizontal glue groove; 12311, deep groove; 12312, shallow groove; 12313, transition part; 1232, vertical glue groove; 12321, long vertical glue groove; 12322, short vertical glue groove; 1233, glue-blocking structure; 12331, first glue-blocking structure; 12332, second glue-blocking structure; 1234, overflow glue groove; 12341, upper overflow glue groove; 12342, lower overflow glue groove; 12343, first glue-blocking groove; 12344, second glue-blocking groove. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings showing multiple embodiments of the present application. It should be understood that the described embodiments are only some embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments described in the present application without creative efforts shall fall within the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including", "comprising", "having", "possessing", "containing", "including" and the like in the specification, claims and drawings of this application are open-ended terms. Therefore, a method or apparatus "including", "comprising", "having" one or more steps or elements has one or more steps or elements, but is not limited to only having these one or more elements. The terms "first", "second", etc. in the specification, claims or drawings of this application are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0033] The mention of "in a real-time manner" in this application means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application may be combined with other embodiments.

[0034] As described above, it should be emphasized that when the term "including / comprising" is used in this specification, it is used to clearly indicate the presence of the described features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components. As used in this application, the singular forms "a", "an" and "the" also include the plural forms unless the context clearly indicates otherwise.

[0035] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0036] As Figure 1As shown in the figure, some embodiments of the present application relate to a periscope camera module, which includes a reflection component 10, a lens component 30, and a photosensitive component 50. The reflection component 10, the lens component 30, and the photosensitive component 50 are assembled in a housing. Among them, the reflection component 10 is used to reflect incident light towards the lens component 30, and the light passes through the lens component 30 and reaches the photosensitive component 50 for imaging.

[0037] The periscope camera module further includes a reflection driving device 20, which drives the reflection component 10 to move to achieve the function of optical image stabilization. It also includes a lens driving component 40, which drives the lens component 30 to move to achieve optical focusing or optical zooming.

[0038] The lens component 30 includes at least one movable group, and the movable group is adapted to be driven by the lens driving component 40 to achieve the functions of optical focusing or optical zooming. In some embodiments of the present application, the lens component 30 only includes one movable group, and the lens component 30 is driven by the lens driving component 40 as one movable group.

[0039] It can be understood that in other embodiments, the lens component 30 may include at least one fixed group and at least one movable group. In other embodiments, the lens component 30 may include at least two movable groups.

[0040] The photosensitive component 50 includes a chip circuit board and a photosensitive chip electrically connected to the chip circuit board. The photosensitive chip is electrically connected to a mobile electronic device through the chip circuit board. The photosensitive chip receives the light emitted by the lens component 30 for imaging, thereby obtaining an image. The photosensitive component 50 further includes a filter element and a filter element bracket for supporting the filter element. The filter element is disposed between the lens component 30 and the photosensitive chip and is fixed to the chip circuit board through the filter element bracket. The filter element is used to filter out unnecessary light for imaging to improve the final imaging quality.

[0041] As Figures 1-3 shown, the reflection component 10 includes a reflection element 11 and a carrier 12. The carrier 12 is movably assembled on a base, and the reflection element 11 is fixed to the carrier 12 to move with the carrier 12 to achieve optical image stabilization.

[0042] The carrier 12 includes a main body portion 121 and side wall portions 122 on both sides. The side wall portions 122 have a top edge. The reflection element 11 is adhesively fixed to the carrier 12. Among them, the side wall portions 122 are respectively a first side wall portion 1221 and a second side wall portion 1222, and two sides of the reflection element 11 are adhesively fixed to the first side wall portion 1221 and the second side wall portion 1222 respectively.

[0043] Further, the main body portion 121 has a bearing surface 1211 for providing bearing for the reflecting element 11. The bearing surface 1211 extends obliquely, intersects the main body portion 121 at the top side edge, and is inclined at an angle relative to the top side edge. During assembly, the reflecting element 11 and the bearing surface 1211 are pre-fixed. The projection of the bearing surface 1211 onto the inner surface of the side wall portion 122 forms a hypotenuse, and an adhesive surface is formed between the hypotenuse and the top side edge and the longitudinal edge of the side wall portion 122 for bonding the side surface of the reflecting element 11.

[0044] Furthermore, the first side wall portion 1221 and the second side wall portion 1222 respectively form a first retaining wall 12211 and a second retaining wall 12212. Two longitudinal edges of the light-emitting surface 112 of the reflecting element 11 can be abutted against the inner surfaces of the first retaining wall 12211 and the second retaining wall 12212. The first retaining wall 12211 and the second retaining wall 12212 play a role in limiting the reflecting element 11 and suppressing stray light.

[0045] As Figure 6 shown, in some embodiments of the present application, the reflecting element 11 is a right-angled prism, having an incident surface 111, a light-emitting surface 112, and a reflecting surface 113. The incident surface 111 is for light to enter, the reflecting surface 113 is for deflecting the direction of light, and the light-emitting surface 112 is for light to exit. Wherein the light-emitting surface 112 abuts against the first retaining wall 12211 and the second retaining wall 12212, the reflecting surface 113 abuts against the bearing surface 1211, and the incident surface 111, the light-emitting surface 112, and the reflecting surface 113 are connected end to end and perpendicular to the light-emitting surface 112.

[0046] It is worth mentioning that the incident surface 111, the light-emitting surface 112, and the reflecting surface 113 are connected end to end in sequence, and the reflecting element 11 has two generally triangular side surfaces.

[0047] Further, in some embodiments of the present application, the incident surface 111 is a convex surface protruding towards the object side, and the light-emitting surface 112 is a concave surface recessed towards the principle light-emitting direction. In short, the reflecting element 11 can be a surface-type prism with a curved surface profile.

[0048] Furthermore, the reflecting element 11 can also be implemented as a reflecting mirror.

[0049] It can be understood that the convex surface of the reflecting surface 113 protruding towards the object side can be a spherical surface, an aspherical surface, or a free-form surface; similarly, the concave surface of the light-emitting surface 112 recessed away from the light-emitting direction can also be a spherical surface, an aspherical surface, or a free spherical surface. Those skilled in the art can determine the final processed shape according to their own situations.

[0050] In other examples, the incident surface 111 may be provided with an incident lens for adjusting incident light, and the exit surface 112 may be provided with an exit lens for adjusting exit light.

[0051] As Figure 2 shown, the reflecting element 11 is mounted to the carrier 12, the reflecting element 11 and the main body portion 121 are pre-fixed, and there are certain gaps between the two side surfaces of the reflecting element 11 and the first side wall portion 1221 and the second side wall portion 1222 respectively for filling side glue to completely fix the reflecting element 11 to the carrier 12.

[0052] As Figure 3 、 Figure 4 shown, a glue groove 123 is provided on the inner surface of the side wall portion 122. During assembly, glue is filled into the glue groove 123 so that the glue groove 123 is bonded to the side surface of the reflecting element 11 to form a bonding structure to fix the reflecting element 11 to the carrier 12. In some embodiments of the present application, the glue is a thermosetting glue. After dispensing the glue, wait for the glue to seep down into the glue groove 123 until it is fully filled, and then bake and cure the glue to complete the fixation of the reflecting element 11 and the carrier 12. In other examples of the present application, the glue may be a photocuring glue or a photo-thermal curing glue, etc.

[0053] In some embodiments of the present application, the glue groove 123 includes a horizontal glue groove 1231 and a vertical glue groove 1232. In some embodiments of the present application, the glue is disposed in the horizontal glue groove 1231 and seeps down from the horizontal glue groove 1231 to the vertical glue groove 1232 to bond the side surface of the reflecting element 11 and the side wall portion 122.

[0054] It is worth mentioning that in order to ensure a good bonding effect, the horizontal glue groove 1231 should accommodate a sufficient amount of glue, and the vertical glue groove 1232 can provide a sufficient bonding area after filling with glue to ensure the final bonding effect.

[0055] Therefore, in some embodiments of the present application, the glue groove 123 includes a plurality of vertical glue grooves 1232 spaced apart and distributed below the horizontal glue groove 1231 for the glue to seep down.

[0056] Furthermore, in some embodiments of the present application, the lower end of the vertical glue groove 1232 extends to the lower edge of the inner surface of the side wall portion 122, the horizontal glue groove 1231 is opened downward from the top side edge of the side wall portion 122, the vertical glue groove 1232 is opened from the lower edge of the horizontal glue groove 1231, and the vertical glue groove 1232 gradually becomes longer along the extending direction of the bearing surface 1211 from one side of the main body portion 121.

[0057] Further, in some embodiments of the present application, the gap between the side surface of the reflection element 11 and the inner surface of the side wall portion 122 is larger at the horizontal glue groove 1231 and smaller at the vertical glue groove 1232.

[0058] It is worth mentioning that, due to the gap between the side surface of the reflection element 11 and the inner surface of the side wall portion 122 being larger at the horizontal glue groove 1231 and smaller at the vertical glue groove 1232, the volume of the horizontal glue groove 1231 is larger than that of the vertical glue groove 1232. Therefore, the horizontal glue groove 1231 can hold a sufficient amount of glue, making the glue closer to the side surface of the reflection element 11 in the vertical glue groove 1232, which is convenient for bonding.

[0059] Furthermore, in some embodiments of the present application, the volume of the vertical glue groove 1232 is smaller than that of the horizontal glue groove 1231.

[0060] Furthermore, in some embodiments of the present application, the lower end of the vertical glue groove 1232 can extend downward to below the hypotenuse formed by the projection of the bearing surface 1211 of the main body portion 121 onto the side wall portion 122, for expanding the glue filling area, increasing the bonding area, and also preventing the glue from seeping down to the lower end and overflowing from the glue groove 123 to the surface of the reflection element 11, which may affect the final imaging quality.

[0061] Furthermore, in some embodiments of the present application, the horizontal glue groove 1231 is in a stepped shape, including a deep groove 12311 and a shallow groove 12312. The shallow groove 12312 and the deep groove 12311 are formed on the inner surface of the side wall portion 122. The bottom of the shallow groove 12312 is close to the top side edge and adjacent to the bearing surface 1211, and the bottom of the deep groove 12311 is relatively far from the top side edge and away from the connection between the side wall portion 122 and the main body portion 121. That is, the shallow groove 12312 is close to the main body portion 121, and the deep groove 12311 is far from the main body portion 121.

[0062] In some embodiments of the present application, the volume of the shallow groove 12312 is smaller than that of the deep groove 12311, so that when dispensing glue, the amount of glue contained in the shallow groove 12312 is less than that contained in the deep groove 12311.

[0063] It can be understood that in some embodiments of the present application, the horizontal glue groove 1231 mainly serves as an injection port for glue and a means for guiding the glue to the vertical glue groove 1232. In specific implementation, those skilled in the art can appropriately adjust the shape of the horizontal glue groove 1231 according to their own needs in combination with this function for convenient implementation.

[0064] Similarly, in some embodiments of the present application, the vertical glue groove 1232 mainly serves to spread the glue and bond the reflective element 11 with the glue. In specific implementation, those skilled in the art can adjust the shape and arrangement of the vertical glue groove according to their own needs around this function for convenient implementation.

[0065] In some embodiments of the present application, the horizontal glue groove 1231 further includes a transition portion 12313. The transition portion 12313 is disposed between the deep groove 12311 and the shallow groove 12312, and extends downward from the end of the shallow groove 12312 to the start end of the deep groove 12311, such that the transition portion 12313 forms a slope, which can ensure that the glue can smoothly enter the deep groove 12311 from the shallow groove 12312 during glue application.

[0066] It can be understood that the transition portion 12313 in some embodiments of the present application mainly serves to allow the glue in the shallow groove 12312 to flow more smoothly into the deep groove 12311, and those skilled in the art can determine the shape of the transition portion 12313 according to their own circumstances.

[0067] In some embodiments of the present application, the vertical glue groove 1232 further includes a long vertical glue groove 12321 and a short vertical glue groove 12322. The short vertical glue groove 12322 is disposed below the shallow groove 12312, and the long vertical glue groove 12321 is disposed below the deep groove 12311.

[0068] It is worth mentioning that the volume of the short vertical glue groove 12322 is smaller than that of the long vertical glue groove 12321. In order to enable the glue to fully penetrate downward in the vertical glue groove 1232, in some embodiments of the present application, the volume of the shallow groove 12312 is smaller than that of the deep groove 12311. When the glue fully penetrates downward to the short vertical glue groove 12322, the remaining glue in the shallow groove 12312 will flow into the deep groove 12311 and penetrate downward into the long vertical glue groove 12321, so that the bonding area in the vertical glue groove 1232 is enlarged, further improving the final bonding effect.

[0069] In some embodiments of the present application, the lengths of some of the long vertical glue grooves 12321 in the long vertical glue groove 12321 are the same and extend downward from the deep groove 12311.

[0070] In some embodiments of the present application, the long vertical glue groove 12321 extends downward from the lower edge of the deep groove 12311 to the middle position of the side wall portion 122, such that the lengths of the long vertical glue grooves 12321 are arranged to be consistent, ensuring that the stress generated by the glue during the bonding process is concentrated in the middle of the reflective element 11.

[0071] Such as Figure 8As shown, in some embodiments of the present application, the long vertical glue groove 12321 extends downward from the lower edge of the deep groove 12311 to the bottom end of the side wall portion 122, and is arranged in sequence along the bearing surface 1211 and gradually increases in length, so as to increase the bonding area.

[0072] It should be noted that when the long vertical glue groove 12321 extends to the bottom end of the side wall portion 122, it may cause the thickness of the side wall portion 122, affecting the structural strength of the carrier 12, such that the carrier 12 needs to avoid distribution with motor devices such as magnets. Those skilled in the art can adjust the final implementation scheme according to their own situations during implementation.

[0073] It can be understood that in some embodiments of the present application, the design of the long vertical glue groove 12321 and the short vertical glue groove 12322 is mainly to make the final shape of the vertical glue groove 1232 more conform to the side surface of the reflection element 11, so as to improve the final bonding effect. During specific implementation, those skilled in the art can modify the shape of the vertical glue groove 1232 according to the shape of their own reflection element 11.

[0074] In some embodiments of the present application, the depth of the deep groove 12311 is greater than the depth of the shallow groove 12312, and the volume of the deep groove 12311 is equal to or slightly larger than the total volume of the long vertical glue groove 12321, and the volume of the shallow groove 12312 is equal to or slightly larger than the total volume of the short vertical glue groove 12322, so as to respectively accommodate a sufficient amount of glue that can fill the long vertical glue groove 12321 and the short vertical glue groove 12322.

[0075] It can be understood that since the volume of the shallow groove 12312 is smaller than the volume of the deep groove 12311, and the volume of the short vertical glue groove 12322 is smaller than the volume of the long vertical glue groove 12321, and at the same time, the glue in the short vertical glue groove 12322 is filled by the seepage of the glue in the shallow groove 12312, so during the actual glue injection process, the short vertical glue groove 12322 will be filled earlier than the long vertical glue groove 12321, causing excess glue to overflow in the shallow groove 12312. This part of the glue will be drained to the deep groove 12311 through the transition portion 12313 and seep into the long vertical glue groove 12321, so that the long vertical glue groove 12321 is fully filled, avoiding problems such as uneven bonding and glue overflow caused by insufficient filling of the glue in the long vertical glue groove 12321.

[0076] Furthermore, in order to further improve the bonding effect of the reflection element 11, in some embodiments of the present application, the total volume of the horizontal glue groove 1231 is equal to or slightly larger than the total volume of the vertical glue groove 1232. Such a design enables the glue to seep down through the horizontal glue groove 1231 into the vertical glue groove 1232, and still leaves a certain amount of glue in the horizontal glue groove 1231 on the premise that the vertical glue groove 1232 is fully filled with glue. Ultimately, it increases the bonding area between the glue groove 123 and the reflection element 11, thereby improving the final bonding effect.

[0077] In some embodiments of the present application, the long vertical glue groove 12321 extends to the middle position of the side wall portion 122, such that the deep groove 12311, the long vertical glue groove 12321, and the short vertical glue groove 12322 jointly form a bonding area at the middle position of the side wall portion 122. This design can ensure that the main bonding area between the glue groove 123 and the reflection element 11 is located at the central position of the side of the reflection element 11. When the stress generated by the curing and shrinkage of the glue is applied, it will be evenly distributed on the side of the reflection element 11, making the stress on the side of the reflection element 11 from the glue become average, and ultimately the resulting abnormal deformation has a smaller impact, enabling higher-quality imaging.

[0078] It can be understood that in the prior art, the glue used for bonding will undergo volume shrinkage during curing, and this shrinkage stress will be transmitted to the reflection element through the bonding interface. When the bonding surface is offset to one side of the reflection element or the contact between the glue and the reflection element is insufficient, local stress concentration will occur due to the curing and shrinkage of the glue, resulting in local deformation of the reflection element in the prior art, causing a large deflection of light when passing through the reflection element, and ultimately reducing the final imaging effect.

[0079] Compared with the bonding method in the prior art, in some embodiments of the present application, the stress generated during the bonding process can be controlled at the middle position of the reflection element 11 by the way that the vertical glue groove 1232 and the deep groove 12311 jointly form a bonding area. The design of the deep groove 12311, the shallow groove 12312, and the transition portion 12313 enables the short vertical glue groove 12322 to be fully filled, and then the excess glue can be drained from the shallow groove 12312 to the deep groove 12311 through the transition portion 12313 and seep down into the long vertical glue groove 12321, ensuring that the long vertical glue groove 12321 is fully filled. At the same time, it also ensures that the stress exerted by the glue at each position in the bonding area on the reflection element 11 is relatively average, ultimately making the abnormal deformation of the reflection element 11 smaller and ensuring the final imaging effect.

[0080] Such as Figure 7As shown, in some embodiments of the present application, on both sides of the bearing surface 1211 close to the side wall portion 122, an adhesive is applied respectively to form a glue-blocking structure 1233, namely a first glue-blocking structure 12331 and a second glue-blocking structure 12332, which are used to avoid the risk of glue overflow during the assembly process.

[0081] As Figure 5 shown, in some embodiments of the present application, the glue groove 123 is hollowed downward to form an overflow glue groove 1234 for accommodating the glue overflowing from the glue groove 123. The overflow glue groove 1234 is arranged between the main body portion 121 and the side wall portion 122. After the glue flows downward to the overflow glue groove 1234, it will not flow to the bearing surface 1211 and come into contact with the surface of the reflection element 11 due to no downward flow space.

[0082] In some embodiments of the present application, the overflow glue groove 1234 includes an upper overflow glue groove 12341 and a lower overflow glue groove 12342, where the lower overflow glue groove 12342 is located obliquely below the upper overflow glue groove 12341.

[0083] In some embodiments of the present application, the upper overflow glue groove 12341 is arranged below the vertical glue groove 1232 corresponding to the shallow groove 12312, and the lower overflow glue groove 12342 is arranged obliquely below the upper overflow glue groove 12341 along the extending direction of the bearing surface 1211.

[0084] Since the glue reaches the bottom relatively faster at the shorter vertical glue groove 1232 and is more likely to overflow, and there is space to set the overflow glue groove 1234 below the shorter part of the vertical glue groove 1232, the glue overflow can be prevented by setting the overflow glue groove 1234 below the shorter part of the vertical glue groove 1232.

[0085] Furthermore, in some embodiments of the present application, the overflow glue groove 1234 is located on the side of the main body portion 121. Since the main body portion 121 is provided with an avoidance space to avoid other components of the reflection driving device 20, there is no space to set the overflow glue groove 1234 below the long vertical glue groove 12321. Therefore, the overflow glue groove 1234 is arranged below the short vertical glue groove 12322 to accommodate the overflowing glue.

[0086] It should be noted that if the depth of the overflow glue groove 1234 is too deep, it may affect the overall strength of the carrier 12 and needs to avoid magnetic stones and other motor devices, thus affecting the overall design.

[0087] Therefore, in order to ensure the overall strength of the carrier 12, in some embodiments of the present application, the glue overflow groove 1234 is vertically opened in the direction where the hypotenuse formed by the projection of the bearing surface 1211 on the side wall portion 122 is vertically downward, and the interface of the glue overflow groove 1234 is generally triangular. Further, the cross-sections of the upper glue overflow groove 12341 and the lower glue overflow groove 12342 are generally triangular. The glue overflow groove 1234 is arranged on the side of the main body portion 121. When the glue seeps down and fills the vertical glue groove 1232, the overflowing glue will continue to flow downward into the glue overflow groove 1234 and will not overflow onto the surface of the reflection element 11.

[0088] It is worth mentioning that since it takes a certain amount of time for the glue to fill the long vertical glue groove 12321, relatively less glue overflows from below the long vertical glue groove 12321. Therefore, even if the glue overflow groove is not provided below the long vertical glue groove 12321, it will not affect the final assembly effect.

[0089] In some embodiments of the present application, a first glue blocking groove 12343 is arranged between the upper glue overflow groove 12341 and the lower glue overflow groove 12342. The first glue blocking groove 12343 extends obliquely from the upper glue overflow groove 12341 to the lower glue overflow groove 12342 and connects the upper glue overflow groove 12341 and the lower glue overflow groove 12342, and is located on the side of the main body portion 121. When the glue overflows into the upper glue overflow groove 12341, it can further flow along the first glue blocking groove 12343 to the lower glue overflow groove 12342 and be accommodated in the lower glue overflow groove 12342, blocking the glue from overflowing between the upper glue overflow groove 12341 and the lower glue overflow groove 12342 onto the surface of the reflection element 11, so as to reduce the risk of glue overflow at the first glue blocking groove 12343.

[0090] In some embodiments of the present application, the first glue blocking groove 12343 is opened downward from the hypotenuse, and the groove edge of the first glue blocking groove 12343 can have the same or similar inclination angle as the hypotenuse formed by the projection of the bearing surface 1211 on the side wall portion 122, or is substantially parallel.

[0091] In some embodiments of the present application, another second glue blocking groove 12344 is arranged between the lower glue overflow groove 12342 and the longitudinal edge of the side wall portion 122. The second glue blocking groove 12344 is formed by extending obliquely downward from the bottom of the lower glue overflow groove 12342.

[0092] It can be understood that in the embodiments of the present application, the main function of the glue overflow groove 1234 is to accommodate the excess glue from the vertical glue groove 1232, thereby preventing the occurrence of glue overflow. Its specific shape and orientation structure mainly depend on the design concept of the carrier 12. Those skilled in the art can adjust the specific design in the glue overflow groove 1234 according to their own circumstances during implementation.

[0093] In the prior art, the assembly of the reflective element is usually carried out in two ways: mechanical height-fixed assembly and active optical alignment assembly. Among them, the mechanical height-fixed assembly is a height-fixed assembly, which directly installs and fixes the reflective element to the carrier through a mechanical structure cooperation method. This installation method will cause the reflective element to deviate during the installation process, and it is necessary to correct it by increasing the stroke of the motor. This will lead to the use of a motor with a greater thrust and further increase the size of the motor. Eventually, the assembled camera module cannot be further miniaturized, which is contrary to the size requirements of the miniaturization of the camera module. At the same time, the conventional mechanical height-fixed assembly will cause tilt between the reflective element and the lens assembly, including the tilt of the reflective element assembly and the offset of the marking points on the carrier and the lens carrier. And assembling the lens needs to be carried out by identifying the marking points on the lens carrier, so material tolerance and assembly tolerance will be generated. The accumulation of tolerances will lead to the offset of the FOV principal point and affect the MTF performance.

[0094] In addition, adopting active optical alignment assembly can compensate for the FOV principal point offset and MTF performance in the above mechanical height-fixed assembly process, and it is also unnecessary to increase the motor stroke to calibrate the position of the reflective element. However, it is necessary to increase the assembly gap of the reflective element. Specifically, the reflective element and the lens assembly are assembled on the motor and the base through active optical alignment. Since the reflective element needs a certain space for position adjustment during the calibration process, there is a certain gap between the reflective element and the carrier to avoid assembly interference. Therefore, the gap between the reflective element and the carrier bracket will be much larger than the gap left by the above mechanical height-fixed assembly. The excessive gap between the reflective element and the carrier will lead to insufficient glue bonding surface and bonding force. At the same time, the traditional carrier design is difficult to ensure that the glue can fully penetrate, reducing the bonding area of the glue, which is likely to cause the phenomenon of the reflective element falling off after bonding, reducing the reliability of the camera module.

[0095] At the same time, the larger gap will increase the risk of glue overflow during dispensing. If the overflowed glue spreads to the surface of the reflective element, the glue will pull the surface of the reflective element after curing, resulting in the deformation of the reflective element, and further affecting the performance of the reflective element and the imaging quality of the camera module.

[0096] Compared with the prior art, in some embodiments of the present application, by providing the glue groove 123, the deep groove 12311 and the shallow groove 12312, the glue penetration rate is increased, and the glue fully penetrates into the vertical glue groove 1232 to provide a sufficient glue bonding area, avoiding the reliability risk of the reflective element 11 falling off.

[0097] Meanwhile, some embodiments of the present application are implemented based on the active optical alignment and assembly method, which can provide sufficient clearance between the reflective element 11 and the carrier 12 for multi-angle position correction of the reflective element 11, compensate for the position of the FOV principal point and the MTF performance, reduce the offset between the reflective element 11 and the lens, improve the performance of the camera module, and make it easier to achieve the miniaturized design of the camera module, thus making up for the deficiencies of the mechanical height-fixed assembly method in the prior art.

[0098] In some embodiments of the present application, the glue overflow groove 1234 structure is also added. When the glue overflows, it can continue to flow downward from the vertical glue groove 1232 to the glue overflow groove 1234, further reducing the risk of glue overflow on the original basis.

[0099] When the present application is implemented, there are the following steps: First, the position of the reflective element 11 should be calibrated. Before calibration, the reflective driving device 20 and the carrier 12 are installed in the base, and the carrier 12 is kept fixed after the reflective driving device 20 is powered on.

[0100] It should be noted that the reflective element 11 and the carrier 12 should have sufficient clearance in multiple directions during calibration, so that the position of the reflective element 11 can be calibrated multi-angularly, reducing the offset of the reflective element 11 to improve the performance of the camera module.

[0101] After the calibration of the reflective element 11 is completed, the carrier 12 can be pre-glued. Glue is applied to the edge of the bearing surface 1211 of the main body 121 of the carrier 12. The glue application method can be implemented by using four-point glue or two-strip glue. The advantage of four-point glue is that the glue area is small and the influence on the surface shape of the reflective element 11 is small. The disadvantage is that the glue overflow groove 1234 needs to be set when using this method, otherwise there will be a risk of glue overflow; the advantage of two-strip glue is that when the carrier 12 is heavy, due to the larger glue area, the bonding force can be increased, and at the same time, since the gap generated when using this method is larger, the glue on the side of the reflective element 11 can be prevented from overflowing to the surface of the reflective element 11. When using this method, the glue overflow groove 1234 can be not set.

[0102] Furthermore, in terms of glue selection, if the four-point glue application method is used for bonding, the preferred UV thermosetting glue can be used for pre-fixing the reflective element 11; if the two-strip glue application method is used for bonding, a low modulus glue is recommended to reduce the curing deformation generated by the glue.

[0103] After the pre-gluing of the carrier 12 is completed, the reflective element 11 can be installed on the carrier 12, the glue is exposed, and the reflective element 11 is pre-fixed.

[0104] After the reflection element 11 is pre-fixed, glue can be applied to the side surface of the reflection element 11. Inject the glue into the horizontal glue groove 1231 and wait for a period of time to allow the glue to fully penetrate into the vertical glue groove 1232 before thermally curing the glue.

[0105] It should be noted that when choosing the glue, attention should be paid to the viscosity and modulus of the glue. Too high viscosity will result in poor fluidity of the glue and insufficient penetration rate, so that it cannot fully contact the reflection element 11. Too low viscosity and too strong fluidity will result in insufficient bonding force after fixation. Therefore, when choosing the glue, a calibration glue with a certain viscosity but relatively low viscosity should be selected to ensure the penetration rate and enable the vertical glue groove 1232 to be fully filled. At the same time, in some embodiments of the present application, low modulus glue is recommended to reduce the risk of surface deformation of the reflection element 11 caused by glue curing deformation.

[0106] Finally, after the glue is cured, the lens assembly 30 is installed on the lens driving assembly 40, and the photosensitive assembly 50 is installed on the base to obtain the imaging module.

[0107] Compared with the imaging modules in the prior art, the imaging modules in some embodiments of the present application are provided with the horizontal glue groove 1231 and the vertical glue groove 1232, and the total volume of the horizontal glue groove 1231 and the vertical glue groove 1232 is equivalent, so that a sufficient amount of glue seeps from the horizontal glue groove 1231 into the vertical glue groove 1232, increasing the proportion of the bonding area on the side surface of the reflection element 11 to more than 75%, making the bonding of the reflection element 11 more reliable.

[0108] At the same time, some embodiments of the present application are also provided with a stepped deep groove 12311 and a shallow groove 12312, and the deep groove 12311 and the shallow groove 12312 respectively correspond to the long vertical glue groove 12321 and the short vertical glue groove 12322. This design can achieve segmented glue painting, and by controlling the glue painting speed and the amount of glue painting, the glue in the deep groove 12311 and the shallow groove 12312 sinks into the long vertical glue groove 12321 and the short vertical glue groove 12322 within a certain period of time.

[0109] Furthermore, in some embodiments of the present application, the deep groove 12311, the long vertical glue groove 12321 and the short vertical glue groove 12322 are connected at the middle position of the side wall portion 122 to jointly form a bonding area. The bonding area can ensure that the stress received by the reflection element 11 from the glue is evenly distributed at the middle position, reducing the influence of the stress generated by glue curing on the reflection element 11 and avoiding the situation that the reflection element 11 is deformed due to local concentrated force.

[0110] Further, in some embodiments of the present application, the glue overflow groove 1234 is disposed on the side of the main body portion 121, and the glue overflowing from the glue groove 123 overflows downward into the glue overflow groove 1234, preventing the glue from overflowing onto the surface of the reflection element 11 and avoiding the situation where the reflection element 11 is mutated due to glue overflow.

[0111] Combined with the above characteristics, there is a sufficient gap between the reflection element 11 and the carrier 12 obtained in some embodiments of the present application compared with the prior art, which can be used for multi-angle calibration of the position of the reflection element 11 to compensate for the offset, and improve the imaging quality of the camera module while having the characteristics of miniaturization.

[0112] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A reflection component, characterized in that, Comprising: A reflective element and a carrier, wherein the reflective element is supported on the carrier for reflecting incident light; the carrier includes a main body portion and side wall portions, the side wall portions are provided on both sides of the main body portion and extend upward from both sides of the main body portion, the side wall portions have a top side edge, and at least one supporting surface is formed on the main body portion and is inclined at an angle with respect to the top side edge for the reflective element to rest on; the inner surface of the side wall portion has a glue groove, the glue groove sequentially forms a horizontal glue groove and a vertical glue groove downward along the top side edge, the horizontal glue groove extends along a direction parallel to the top side edge and is stepped, including a deep groove and a shallow groove, the shallow groove is close to the main body portion, and the deep groove is away from the main body portion; the vertical glue groove extends from the lower edge of the horizontal glue groove to the supporting surface.

2. The reflective component according to claim 1, wherein A transition portion is further provided between the shallow groove and the deep groove, and the transition portion extends downward obliquely from the end of the shallow groove to the starting end of the deep groove.

3. The reflection component according to claim 2, characterized in that The vertical glue groove includes a long vertical glue groove and a short vertical glue groove, the short vertical glue groove is provided below the shallow groove, and the long vertical glue groove is provided below the deep groove.

4. The reflective component according to claim 3, wherein, The long vertical glue groove extends downward from the deep groove to the middle of the side wall portion.

5. The reflecting component according to claim 3, wherein The lengths of some of the long vertical glue grooves are the same.

6. The reflection component according to claim 1, wherein The total volume of the vertical glue groove is smaller than the volume of the horizontal glue groove.

7. The reflection component according to claim 1, characterized in that, The length of the shallow groove is smaller than the length of the deep groove.

8. The reflective component according to claim 1, characterized in that, The supporting surface is further provided with a glue blocking structure, and the glue blocking structure is a strip-shaped protrusion and is respectively provided on both side edges of the supporting surface.

9. The reflection component according to claim 1, wherein, The glue groove further includes an overflow glue groove, the overflow glue groove is provided between the main body portion and the side wall portion and is formed by further hollowing out downward from the glue groove for accommodating the glue overflowing from the glue groove.

10. The reflecting component according to claim 9, characterized in that, The overflow glue groove further includes an upper overflow glue groove and a lower overflow glue groove, the upper overflow glue groove is provided below the vertical glue groove corresponding to the shallow groove, and the lower overflow glue groove is provided obliquely downward in the extending direction of the upper overflow glue groove along the supporting surface.

11. The reflection component according to claim 10, characterized in that, A first glue blocking groove is provided between the upper overflow glue groove and the lower overflow glue groove, and the first glue blocking groove extends obliquely from the upper overflow glue groove to the lower overflow glue groove and connects the upper overflow glue groove and the lower overflow glue groove.

12. The reflective component according to claim 10, wherein A second glue blocking groove is provided between the lower overflow glue groove and the bottom end of the side wall portion, and the second glue blocking groove connects the lower overflow glue groove and extends downward obliquely.

13. A periscope camera module, characterized in that, Comprising any one of the reflective assemblies according to claims 1-12, at least one lens assembly and at least one photosensitive assembly.

14. A method for assembling a reflection component, characterized in that, Comprising the steps of: S1. Provide a reflective element, a carrier and a base, install the carrier on the base, the carrier includes a main body portion and side wall portions extending upward on both sides of the main body portion, the carrier has a supporting surface, and the inner surface of the side wall portion sequentially forms a horizontal glue groove and a vertical glue groove downward along the top side edge, and the horizontal glue groove extends along a direction parallel to the top side edge and is stepped; S2. Pre-apply glue at the edge of the supporting surface of the carrier; S3. Install the reflective element onto the carrier and expose the glue for pre-fixing; S4. Apply glue on the side of the reflection element. Inject the glue into the horizontal glue groove and wait for a period of time to allow the glue to seep down into the vertical glue groove, and then cure the glue to obtain the reflection assembly.

15. The assembling method of the reflection component as described in claim 14, characterized in that, In step S2, the method of pre-applying glue is to apply glue to the four vertices of the bearing surface respectively, and a glue overflow groove is further hollowed out downward between the main body part and the side wall part for accommodating the glue overflowing during the implementation of step S2.

16. The assembling method of the reflection component according to claim 14, characterized in that, In step S2, the method of pre-applying glue is to apply glue on both sides of the bearing surface close to the side wall part, and the glue extends in a strip shape along the direction parallel to the side wall part.

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