Assembly method

Abstract

The invention provides an assembling method, and relates to the technical field of lens installation. The assembling method is used for assembling a lens in an optical main body and comprises the following steps that the optical main body is provided, and the optical main body is provided with a mounting cavity and an opening communicated with the mounting cavity; two limiting parts are symmetrically arranged on two opposite inner walls of the mounting cavity; a lens is inserted into the mounting cavity through the opening, and the lens is fixed between the two limiting parts; injecting glue into a gap between the limiting part and the lens, and solidifying the glue; and the cover plate is fixed at one end of the optical main body with the opening. The assembling method is simple, the time consumed for assembling is short, the phenomenon of edge breakage of the lens can be avoided, and large-scale mass production of the lens module is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of lens installation, and particularly to an assembly method. Background Art

[0002] The assembly of the lens module plays an important role in the optical characteristics of the entire lidar. Currently, on most existing optical bodies, mounting grooves are provided with an opening direction parallel to the axis direction of the lens. The lens and the spacer are alternately inserted into the mounting groove through the opening; the spacer is used to isolate adjacent lenses and ensure the stability of the lens position through a tight fit.

[0003] However, the method of sequentially inserting the lens into the optical body from the opening cannot observe or clean the lens inside the optical body; the spacer and the lens are fixed by a tight fit, which easily causes chipping of the lens, thereby increasing the production cost; and the alternating arrangement of the lens and the spacer will cause the assembly tolerance to gradually increase, thereby affecting the yield rate of the assembled lens module. Summary of the Invention

[0004] To overcome the deficiencies in the prior art, the present invention provides a lens module, a lidar and an assembly method.

[0005] The present invention provides the following technical solutions:

[0006] The present invention provides an assembly method, including the following steps:

[0007] Provide an optical body, the optical body having an installation cavity and an opening communicating with the installation cavity; two limiting portions are symmetrically provided on two inner walls of the installation cavity opposite to each other;

[0008] Insert a lens into the installation cavity through the opening, and fix the lens between the two limiting portions;

[0009] Apply glue to the gap between the limiting portion and the lens, and cure the glue;

[0010] Fix a cover plate to one end of the optical body where the opening is provided.

[0011] In a possible implementation manner, the limiting portion has a first limiting surface, a second limiting surface and a third limiting surface that are sequentially connected; the first limiting surface is parallel to the third limiting surface; the second limiting surface is inclined;

[0012] The step of fixing the lens between the two limiting portions includes: moving the lens along the extending direction of the opening until one side surface of the lens abuts against the bottom wall of the installation cavity, and the third limiting surface is in interference fit with the lens, and the first limiting surface is in clearance fit with the lens.

[0013] In a possible implementation manner, first glue grooves are formed on two opposite inner walls of the installation cavity; a channel in the first glue groove is communicated with a gap between the first limiting surface and the lens;

[0014] The step of applying glue into the gap between the limiting portion and the lens includes: applying glue into the first glue groove so that the glue flows into the gap between the first limiting surface and the lens.

[0015] In a possible implementation manner, the glue used for glue fixation can maintain adhesion below a preset temperature, and the preset temperature is greater than 200 degrees Celsius.

[0016] In a possible implementation manner, the glue used for glue fixation is an ultraviolet curable glue, and when curing the glue, a UV lamp is used to irradiate the glue application site.

[0017] In a possible implementation manner, a second glue groove is formed at one end of the optical body away from the cover plate; the second glue groove is communicated with the installation cavity and corresponds to the lens;

[0018] After the cover plate is fixed to the optical body, the assembly method further includes: turning over the optical body, applying glue into the second glue groove, and curing the glue.

[0019] In a possible implementation manner, a third glue groove is formed on the limiting portion; the third glue groove is communicated with the installation cavity and corresponds to the lens;

[0020] After applying glue into the gap between the limiting portion and the lens, the assembly method further includes:

[0021] Applying glue into the third glue groove, and curing the glue in the third glue groove and the glue between the limiting portion and the lens simultaneously.

[0022] In a possible implementation manner, the step of fixing the cover plate to one end of the optical body where the opening is formed includes:

[0023] Covering the cover plate on one end of the optical body where the opening is formed;

[0024] One end of a fixing member passes through the cover plate and is fixed in a fixing hole on the optical body.

[0025] In a possible implementation manner, before the cover plate is covered on one end of the optical body where the opening is formed, the assembly method further includes:

[0026] Aligning a positioning hole on the cover plate with a positioning post on the optical body.

[0027] In a possible implementation, before the lens is inserted into the installation cavity, the assembly method further includes: cleaning the inner wall of the installation cavity.

[0028] Beneficial effects of the present invention compared with the prior art:

[0029] For the assembly method provided by the present invention, the lens can be inserted into the installation cavity through the opening on the optical body, and the lens can be fixed between two limiting parts to preliminarily fix the lens. After the lens is fixed between the two limiting parts, glue is dropped into the gap between the limiting parts and the lens, and the glue is cured, so as to further improve the firmness of the lens fixed in the installation cavity. After the glue is cured, the cover plate is fixed to one end of the optical body where the opening is provided, so that the cover plate can press the lens tightly in the installation cavity. The assembly method of the lens and the optical body in this application is relatively simple, and the time consumed for assembly is short, and the phenomenon of lens edge chipping can be avoided, which is convenient for large-scale mass production.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0032] Figure 1 Shows a schematic flow chart of the assembly method of an embodiment of the present invention;

[0033] Figure 2 Shows a schematic three-dimensional structure diagram of a lens module according to an embodiment of the present invention;

[0034] Figure 3 Shows a schematic diagram of a lens module removing the cover plate according to an embodiment of the present invention;

[0035] Figure 4 Shows a schematic three-dimensional structure diagram of an optical body according to an embodiment of the present invention;

[0036] Figure 5 Shows Figure 4 an enlarged schematic diagram of part A in

[0037] Figure 6 Shows Figure 4 a schematic three-dimensional structure diagram of another angle of the optical body.

[0038] Description of main component symbols:

[0039] 100 - housing; 110 - optical body; 111 - mounting cavity; 112 - first limiting part; 1121 - first limiting surface; 1122 - second limiting surface; 1123 - third limiting surface; 113 - second limiting part; 114 - third limiting part; 115 - first glue - applying groove; 116 - second glue - applying groove; 117 - third glue - applying groove; 120 - cover plate;

[0040] 200 - first lens;

[0041] 300 - second lens;

[0042] 400 - third lens;

[0043] 1000 - lens module;

[0044] X - first direction; Y - second direction; Z - third direction. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying 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 the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0048] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0050] For ease of understanding, the disadvantages of the existing method of assembling lenses into the optical body are described in detail.

[0051] Currently, the common method of assembling lenses into the optical body is as follows: After applying glue to lens 1, it is inserted into the optical body through the opening in the length direction (extension direction) of the optical body; after applying glue to the first preset position for fixing spacer 1, spacer 1 is inserted into the first preset position through the opening in the length direction of the optical body; after applying glue to lens 2, it is inserted into the optical body through the opening in the length direction of the optical body, and so on.

[0052] The above assembly method is relatively cumbersome, and a separate glue application operation is required for each component when inserting it into the optical body, which results in a long assembly time.

[0053] The spacer is used to separate adjacent lenses to ensure the fixation of the positions of adjacent lenses. To ensure that the distance between adjacent lenses meets the installation requirements, the spacer needs to exert a certain extrusion force on the lenses. If the extrusion force is too large, the lenses will crack and break at the edges; if the extrusion force is too small, there will be a certain clearance between the lenses and the spacer, resulting in the distance between adjacent lenses not meeting the installation requirements.

[0054] In the installation method of lens 1 - spacer 1 - lens 2 - spacer 2..., with the increase in the number of lenses and spacers, certain cumulative errors are bound to occur. If we want to minimize the cumulative errors as much as possible, we need to improve the processing accuracy of the optical body and the lenses, which will lead to too high production costs of the lens module and affect the possibility of mass production of the lens module.

[0055] Embodiment 1

[0056] Please refer to Figures 1 to 6 , an embodiment of the present invention provides an assembly method. The assembly method is used to assemble the lens module 1000.

[0057] The lens module 1000 includes an optical body 110, a cover plate 120 and lenses.

[0058] Define the length direction of the lens module 1000 as the first direction X, the width direction of the lens module 1000 as the second direction Y, and the height direction of the lens module 1000 as the third direction Z.

[0059] Wherein, the first direction X is perpendicular to the second direction Y, and the third direction Z is perpendicular to the first direction X and the second direction Y. It can be understood that the above definitions are only for facilitating the understanding of the relative position relationship of each part in the lens module 1000, and should not be construed as a limitation of the present invention.

[0060] Please refer to Figure 1 , the assembly method includes the following steps:

[0061] First step, provide the optical body 110, the optical body 110 has an installation cavity 111 and an opening communicating with the installation cavity 111; two limiting parts are symmetrically arranged on two inner walls opposite to each other of the installation cavity 111.

[0062] Please refer to Figure 3 and Figure 4 , the installation cavity 111 extends along the first direction X; the opening is opened at one end of the optical body 110 along the third direction; the two limiting parts are respectively arranged on two inner walls opposite to each other of the installation cavity 111 along the second direction Y.

[0063] Second step, insert the lens into the installation cavity 111 through the opening, and fix the lens between the two limiting parts.

[0064] In some embodiments, please refer to Figures 3 to 5 , the limiting part has a first limiting surface 1121, a second limiting surface 1122 and a third limiting surface 1123 that are connected in sequence; the first limiting surface 1121 and the third limiting surface 1123 are respectively parallel to the third direction Z; the second limiting surface 1122 is inclined.

[0065] The lens can be inserted into the installation cavity 111 along the third direction Z until one side of the lens along the third direction Z abuts against the bottom wall of the installation cavity 111. At this time, the third limiting surface 1123 is in interference fit with the lens, and the first limiting surface 1121 is in clearance fit with the lens, so that the lens is fixed between two symmetrically arranged limiting parts.

[0066] Before the lens is inserted into the installation cavity 111, clean the inner wall of the installation cavity 111 to prevent impurities from affecting the accuracy of lens assembly.

[0067] The third step is to apply glue into the gap between the limiting part and the lens and cure the glue.

[0068] After the lens is fixed in the installation cavity 111 through the limiting part, apply glue into the gap between the limiting part and the lens and cure the glue, so that the first limiting surface 1121 can be fixedly connected to the lens by applying glue, thereby improving the firmness of lens fixation.

[0069] In some embodiments, please refer to Figure 3 and Figure 4 , first glue grooves 115 are provided on two opposite inner walls of the installation cavity 111 along the second direction Y; the groove in the first glue groove 115 is communicated with the gap between the first limiting surface 1121 and the lens.

[0070] By applying glue into the first glue groove 115, the glue can flow into the gap between the first limiting surface 1121 and the lens; the glue can also flow into the gap between the second limiting surface 1122 and the lens; so that the first limiting surface 1121 and the second limiting surface 1122 are respectively fixedly connected to the lens.

[0071] In some embodiments, a third glue groove 117 is provided on the limiting part; the third glue groove 117 is communicated with the installation cavity 111 and corresponds to the lens.

[0072] After applying glue into the gap between the limiting part and the lens, apply glue into the third glue groove 117 and cure the glue in the third glue groove 117 and the glue between the limiting part and the lens simultaneously.

[0073] The third glue groove 117 can improve the reliability of the fixed connection between the side surface of the lens along the second direction Y and the limiting part.

[0074] The fourth step is to fix the cover plate 120 to one end of the optical main body 110 where the opening is provided.

[0075] The lens module 1000 further includes a fixing member; after the cover plate 120 is covered on one end of the optical body 110 where the opening is provided, one end of the fixing member passes through the cover plate 120 and is fixed in a fixing hole on the optical body 110, so that the cover plate 120 is fixed to one end of the optical body 110 where the opening is provided.

[0076] The cover plate 120 can press the lens tightly in the installation cavity 111 along the third direction to improve the firmness of the lens fixation.

[0077] Before the cover plate 120 is covered on one end of the optical body 110 where the opening is provided, align the positioning hole on the cover plate 120 with the positioning post on the optical body 110 to determine the relative position between the cover plate 120 and the optical body 110.

[0078] A second glue dispensing groove 116 is provided at one end of the optical body 110 away from the cover plate 120; the second glue dispensing groove 116 communicates with the installation cavity 111 and corresponds to the lens.

[0079] After the cover plate 120 is fixed to the optical body 110, turn over the optical body 110, dispense glue into the second glue dispensing groove 116, and cure the glue, so that one side of the lens away from the cover plate 120 along the third direction is fixedly connected to the bottom wall of the installation cavity 111.

[0080] The glue used for glue dispensing fixation can maintain adhesion below a preset temperature, and the preset temperature is greater than 200 degrees Celsius.

[0081] The glue used for glue dispensing fixation is an ultraviolet light curable glue, and the glue dispensing part is irradiated with an ultraviolet lamp when curing the glue.

[0082] Embodiment 2

[0083] Please refer to Figures 2 to 6 , the present invention further provides a lens module 1000; the lens module 1000 is assembled by the above assembly method.

[0084] The lens module 1000 includes a housing 100 and at least one lens.

[0085] Among them, the housing 100 includes an optical main body 110 and a cover plate 120; the optical main body 110 has a mounting cavity 111 extending along the first direction X; two limiting portions are symmetrically provided on two inner walls of the mounting cavity 111 opposite to each other along the second direction Y; one end of the optical main body 110 along the third direction Z is provided with an opening, and the opening is communicated with the mounting cavity 111; the cover plate 120 is detachably arranged at one end of the optical main body 110 where the opening is provided.

[0086] When the cover plate 120 is detached from the optical main body 110, the lens can be put into the mounting cavity 111 through the opening on the optical main body 110, and the lens can be fixed between the two symmetrically arranged limiting portions, so that the lens is fixed in the mounting cavity 111.

[0087] Among them, one end of the limiting portion away from the opening along the third direction Z is in interference fit with one side surface of the lens along the second direction Y to preliminarily fix the position of the lens in the mounting cavity 111; the other end of the limiting portion along the third direction Z is in clearance fit with one side surface of the lens along the second direction Y.

[0088] The gap between the limiting portion and the lens is used to accommodate glue. By injecting glue into the gap between the lens and the limiting portion, the firmness of the lens fixed in the mounting cavity 111 can be further improved after the glue is cured.

[0089] After the lens is fixed with glue, the cover plate 120 can be fixed at one end of the optical main body 110 where the opening is provided to press the lens into the mounting cavity 111 along the third direction Z.

[0090] The assembly method adopted by the lens module 1000 of the present invention is: the position of the lens in the mounting cavity 111 is preliminarily fixed by the two symmetrically arranged limiting portions, and then the firmness of the lens fixed in the mounting cavity 111 is further improved by the method of fixing with glue. Finally, the lens is pressed into the mounting cavity 111 along the third direction Z by the cover plate 120.

[0091] The lens of the present invention is assembled within the optical body 110 in a manner that does not require the use of spacers to separate adjacent lenses, thereby avoiding the occurrence of lens edge chipping caused by the spacer squeezing the lens. When multiple lenses are respectively loaded into the optical body 110, there is no need to perform glue dotting operations on each lens individually, and there is no need to install spacers between adjacent lenses. The assembly method is simple and the time required for assembly is short. The method of fixing the lens by two symmetrically arranged limiting parts will not produce cumulative errors when multiple lenses are assembled. Therefore, the requirements for the processing precision of the optical body 110 and the lens are relatively low, thereby effectively reducing the production cost and facilitating the mass production of the lens module 1000.

[0092] In some embodiments, one side of the limiting part facing the installation cavity 111 has an inclined slope; the inclined slope is in interference fit with the lens at the end away from the opening along the third direction Z; the other end of the inclined slope along the first direction X is in clearance fit with the lens.

[0093] For two symmetrically arranged inclined slopes, the vertical distance at the end away from the opening along the third direction Z gradually increases towards the other end.

[0094] When the lens is placed into the installation cavity 111 through the opening along the third direction Z, as the height of the lens gradually decreases, two symmetrically arranged inclined slopes can respectively squeeze both sides of the lens along the second direction Y. When one side of the lens along the third direction Z fits against the bottom wall of the installation cavity 111, the squeezing force exerted on the lens by the end of the inclined slope away from the opening along the third direction Z is the greatest, so as to fix the lens between two symmetrically arranged inclined slopes.

[0095] In some embodiments, please refer to Figures 3 to 5 , one side of the limiting part facing the installation cavity 111 has a first limiting surface 1121, a second limiting surface 1122 and a third limiting surface 1123 that are sequentially connected; the first limiting surface 1121 and the third limiting surface 1123 are respectively parallel to the third direction Z; the second limiting surface 1122 is inclined.

[0096] The first limiting surface 1121 is closer to the opening of the optical body 110 than the second limiting surface 1122.

[0097] Wherein, the first limiting surface 1121 is in clearance fit with the lens; the clearance between the second limiting surface 1122 and the lens gradually decreases from the junction of the second limiting surface 1122 and the first limiting surface 1121 to the junction of the second limiting surface 1122 and the third limiting surface 1123; the third limiting surface 1123 is in interference fit with the lens.

[0098] The lens can be placed into the installation cavity 111 along the third direction Z through the opening.

[0099] When the lens moves from the position corresponding to the height of the first limiting surface 1121 to the position corresponding to the height of the second limiting surface 1122, the first limiting surface 1121 does not interfere with one side surface of the lens along the second direction Y.

[0100] When the lens moves from the position corresponding to the height of the second limiting surface 1122 to the position corresponding to the height of the third limiting surface 1123, the distance between the second limiting surface 1122 and one side surface of the lens along the second direction Y gradually decreases.

[0101] When the lens moves from the position corresponding to the height of the third limiting surface 1123 to the position corresponding to the bottom wall height of the installation cavity 111, the two symmetrically arranged third limiting surfaces 1123 can respectively squeeze both sides of the lens along the second direction Y, so that when one side surface of the lens along the third direction Z fits against the bottom wall of the installation cavity 111, the lens is fixed in the installation cavity 111.

[0102] By respectively arranging the first limiting surface 1121, the second limiting surface 1122 and the third limiting surface 1123 on the limiting part, the interference fit area between the limiting part and the lens can be effectively increased, and at the same time, it is ensured that the extrusion force exerted by the third limiting surface 1123 on the lens is relatively uniform, effectively preventing the occurrence of the phenomenon of lens edge chipping due to excessive extrusion force.

[0103] Please refer to Figure 3 and Figure 4 In some embodiments, the lens module 1000 includes three groups of lenses, namely a first lens 200, a second lens 300 and a third lens 400; three limiting parts are provided on each of the two opposite inner walls of the installation cavity 111 along the second direction Y, and the three limiting parts are respectively a first limiting part 112, a second limiting part 113 and a third limiting part 114; the three groups of lenses can be respectively inserted into the installation cavity 111 through the openings on the optical main body 110 and are respectively fixed between the corresponding two limiting parts.

[0104] In some embodiments, there is a retaining platform between the first limiting portion 112 and the second limiting portion 113; the retaining platform protrudes from the surface of an inner wall of the installation cavity 111 along the second direction Y. One side surface of the first lens 200 along the first direction X can abut against the retaining platform to limit the assembly of the first lens 200.

[0105] In some embodiments, referring to Figures 3 to 5 , first glue grooves 115 are formed on both opposite inner walls of the installation cavity 111 along the second direction Y; the groove in the first glue groove 115 communicates with the gap between the first limiting surface 1121 and the lens. By injecting glue into the first glue groove 115, the glue can flow into the gap between the first limiting surface 1121 and the lens; after the glue cures, the first limiting surface 1121 can be fixedly connected to the lens to further improve the firmness of the lens fixed in the installation cavity 111.

[0106] The glue in the first glue groove 115 can also flow into the gap between the second limiting surface 1122 and the lens; so that the second limiting surface 1122 is fixedly connected to the lens.

[0107] Exemplarily, the first glue groove 115 is an arc-shaped groove.

[0108] In some embodiments, referring to 3 and Figure 4 , one first glue groove 115 is provided at the third limiting portion 114. The groove wall of the first glue groove 115 is connected to an inner wall of the installation cavity 111 along the first direction X. A part of one side surface of the third lens 400 along the second direction Y cooperates with the third limiting portion 114, and the other part is disposed in the first glue groove 115. When the third lens 400 is assembled in place, one side surface of the third lens 400 along the first direction X can abut against the inner wall of the installation cavity 111 along the first direction X.

[0109] In some embodiments, referring again to Figure 3 and Figure 4 , one first glue groove 115 is provided on each side of the second limiting portion 113; the two first glue grooves 115 are symmetrically arranged with the second limiting portion 113 as the center; the two side surfaces of the second lens 300 along the first direction X respectively abut against the inner walls of the corresponding first glue grooves 115 to limit the movement of the second lens 300 in the installation cavity 111 along the first direction X.

[0110] In some embodiments, referring to Figure 2 and Figure 3, the lens module 1000 further includes a fixing member (not shown in the figure), and the cover plate 120 is fixed to the optical body 110 by the fixing member.

[0111] Exemplarily, the fixing member is a screw, and the optical body 110 has a fixing hole opened at one end with an opening; after the cover plate 120 is covered on the one end of the optical body 110 with the opening, one end of the fixing member passes through the cover plate 120 and is in threaded cooperation with the inner wall of the fixing hole, so that the cover plate 120 is arranged at the one end of the optical body 110 where the opening is opened.

[0112] In some embodiments, the fixing member is a snap fastener, the snap fastener is fixed on the cover plate 120, and the optical body 110 has a snap hole opened at one end with an opening; the snap fastener is detachably arranged in the snap hole, so that the cover plate 120 is detachably arranged on the optical body 110.

[0113] In some embodiments, please refer to Figure 6 , a second glue injection groove 116 is opened at one end of the optical body 110 away from the cover plate 120 along the third direction Z; the second glue injection groove 116 is communicated with the installation cavity 111 and corresponds to one side surface of the lens along the third direction Z.

[0114] After the cover plate 120 is fixed to the optical body 110, flip the lens module 1000 so that the end of the optical body 110 away from the cover plate 120 faces upward. By injecting glue into the second glue injection groove 116, the glue can be cured to fixedly connect one side surface of the lens along the third direction Z with the inner wall of the installation cavity 111, so as to improve the firmness of the lens fixed in the installation cavity 111.

[0115] In some embodiments, please refer to Figure 3 and Figure 4 , a third glue injection groove 117 is opened on the limiting portion; the third glue injection groove 117 is communicated with the installation cavity 111 and corresponds to one side surface of the lens along the second direction Y.

[0116] By injecting glue into the third glue injection groove 117, the glue can be cured to fixedly connect one side surface of the lens along the second direction Y with the inner wall of the installation cavity 111, so as to improve the firmness of the lens fixed in the installation cavity 111.

[0117] Embodiment III

[0118] The present invention further provides a lidar, including the above lens module 1000. The lidar can emit a laser beam to detect characteristic quantities such as the position and speed of a target.

[0119] The lidar provided in this embodiment has the lens module 1000 provided in the above embodiment. Therefore, it has all the beneficial effects of the lens module 1000 provided in any of the above embodiments, and will not be elaborated here one by one.

[0120] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0121] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An assembly method, characterized in that, Including the following steps: Providing an optical body having a mounting cavity and an opening communicating with the mounting cavity; two limiting portions are symmetrically provided on two inner walls opposite to each other of the mounting cavity; Inserting a lens into the mounting cavity through the opening and fixing the lens between the two limiting portions; Applying glue into the gap between the limiting portion and the lens and curing the glue; Fixing a cover plate to one end of the optical body where the opening is provided.

2. The assembly method according to claim 1, characterized in that, The limiting portion has a first limiting surface, a second limiting surface and a third limiting surface that are sequentially connected; the first limiting surface is parallel to the third limiting surface; the second limiting surface is inclined; The step of fixing the lens between the two limiting portions includes: moving the lens along the extending direction of the opening until one side surface of the lens abuts against the bottom wall of the mounting cavity, and the third limiting surface is in interference fit with the lens, and the first limiting surface is in clearance fit with the lens.

3. The assembly method according to claim 2, wherein, First glue grooves are provided on two inner walls opposite to each other of the mounting cavity; the groove in the first glue groove communicates with the gap between the first limiting surface and the lens; The step of applying glue into the gap between the limiting portion and the lens includes: applying glue into the first glue groove to enable the glue to flow into the gap between the first limiting surface and the lens.

4. The assembly method according to claim 3, wherein, The glue used for glue fixing can maintain adhesion below a preset temperature, and the preset temperature is greater than 200 degrees Celsius.

5. The assembly method according to claim 3, characterized in that, The glue used for glue fixing is an ultraviolet light-curing glue, and the glue is cured by irradiating the glue-applied part with an ultraviolet lamp.

6. The assembly method according to claim 1, characterized in that, A second glue groove is provided at one end of the optical body away from the cover plate; the second glue groove communicates with the mounting cavity and corresponds to the lens; After the cover plate is fixed to the optical body, the assembling method further includes: turning over the optical body, applying glue into the second glue groove and curing the glue.

7. The assembly method according to claim 1, characterized in that, A third glue groove is provided on the limiting portion; the third glue groove communicates with the mounting cavity and corresponds to the lens; After applying glue into the gap between the limiting portion and the lens, the assembling method further includes: Applying glue into the third glue groove and curing the glue in the third glue groove and the glue between the limiting portion and the lens simultaneously.

8. The assembly method according to claim 1, characterized in that, The step of fixing the cover plate to one end of the optical body where the opening is provided includes: Covering the cover plate on one end of the optical body where the opening is provided; One end of a fixing member passes through the cover plate and is fixed in a fixing hole on the optical body.

9. The assembly method according to claim 8, wherein Before the cover plate is covered on one end of the optical body where the opening is provided, the assembling method further includes: Aligning the positioning hole on the cover plate with the positioning post on the optical body.

10. The assembly method according to claim 1, characterized in that, Before the lens is inserted into the mounting cavity, the assembling method further includes: cleaning the inner wall of the mounting cavity.

Images