Thermal deformation adaptive lens mount

Abstract

A thermal deformation adaptive lens mount belongs to the technical field of optical imaging and comprises a lining and a fixing portion, an accommodating cylinder for accommodating a lens is arranged at the upper end of the lining, a base for supporting a PCB is arranged at the lower end of the lining, the fixing portion comprises a limiting ring and a supporting column, the limiting ring is connected to the upper end of the supporting column, and the lower end of the limiting ring is connected with the upper end of the lining. The lining is made of materials with the thermal expansion coefficient larger than that of the fixing part, the lower end of the inner side of the containing cylinder is provided with threads used for fixing the lens, and the base is provided with an elastic structure used for providing supporting force and expansion space. The technical scheme can solve the problem that the mounting height of the lens changes along with temperature.

Description

TECHNICAL FIELD

[0001] The utility model belongs to optical imaging technical field, especially, relate to a lens seat. BACKGROUND

[0002] Lens seat is the component of general optical imaging system, is used for fixing lens in the proper position on the circuit board, makes the incident light form image on the imaging chip after passing through the lens. The temperature of the working environment of general optical imaging system has diversity and can change with time, under this condition, the traditional all-metal or all-plastic lens seat can occur thermal deformation, changes the installation height of the lens, causes the problem of unclear imaging.

[0003] The existing better solution is a high-temperature stable lens seat, adopts the combination of upper plastic lining and lower metal base, the plastic lining is fixed to the top end of the metal base, the inside of the plastic lining forms a containing groove for containing the lens, when heated, the expansion and expansion of the metal base and the plastic lining are offset each other, so that the lens maintains the position during installation. This lens seat has the problems of high production difficulty of the metal base, complex and unreasonable cooperation between the plastic lining and the metal base, and difficult to realize thermal deformation compensation effect caused by using full thread inside the containing groove. UTILITY MODEL CONTENTS

[0004] In view of the problem that the thermal expansion of the lens seat changes the installation height of the lens, and the above-mentioned problems in the prior art, the utility model provides a thermal deformation self-adapting lens seat.

[0005] The technical scheme adopted by the utility model to solve its technical problems is: a thermal deformation self-adapting lens seat is provided, which comprises: a lining, the upper end of the lining is provided with a containing cylinder for containing a lens, and the lower end of the lining is provided with a base for supporting on a PCB; a fixed part, the fixed part comprises a limiting ring and a supporting column, the limiting ring is connected to the upper end of the supporting column; the lower end of the limiting ring is connected with the upper end of the lining, and the vertical upward movement of the lining is limited.

[0006] Further preferred scheme of the utility model is that the preparation material of the lining is a material with a thermal expansion coefficient greater than that of the fixed part.

[0007] Further preferred scheme of the utility model is that the lower end of the inside of the containing cylinder is provided with a thread for fixing the lens.

[0008] Further preferred scheme of the utility model is that the base is provided with an elastic structure, and the elastic structure is used to provide supporting force and expansion space.

[0009] The utility model discloses a beneficial effect is: when environmental temperature changes, can control the direction and degree of deformation of each part of lens seat after being heated, form the heat deformation compensation at the lens installation height control point on the inner lining, keep the lens installation height in certain temperature range, guarantee the clear imaging of optical imaging system, fixed part is suitable for stamping forming, and production is simple and efficient, and the inner lining bottom end is not suspended, and the lens seat stability is good. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model;

[0011] Figure 2 It is the front view section schematic diagram of the utility model;

[0012] Figure 3 It is the structure schematic diagram of the fixed part of the utility model for full -enclosed;

[0013] Figure 4 It is the structure schematic diagram of the limiting ring of the utility model for no gap.

[0014] The drawing mark is explained: 10-inner lining, 11-accommodate cylinder, 111-thread, 112-positioning step, 12-base, 121-elastic structure, 20-fixed part, 21-limiting ring, 22-supporting column, 221-fixing structure. DETAILED DESCRIPTION

[0015] The technical scheme in the utility model will be described clearly below in conjunction with the drawings and examples, and obviously, the described example is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. For example, the word "connected" and "coupled" are used broadly and encompass both direct and indirect connections, couplings and the like. Thus, if there are descriptions that the limiting ring is connected to the supporting column, it means that the limiting ring can be directly connected to the supporting column, or indirectly connected to the supporting column through other devices.

[0017]

Example 1

[0018] As Figure 1 , Figure 2As shown, the thermal deformation adaptive lens mount includes: a lining 10 and a fixing portion 20. The upper end of the lining is provided with a receiving tube 11 for accommodating the lens, and the lower end of the lining is provided with a base 12 for supporting the PCB board. The fixing portion includes a limiting ring 21 and a support column 22. The limiting ring is connected to the upper end of the support column, and the lower end of the limiting ring is connected to the upper end of the lining to limit the vertical upward movement of the lining. The lining is made of a material with a thermal expansion coefficient greater than that of the fixing portion. A thread 111 for fixing the lens is provided at the lower end of the inner side of the receiving tube. The base is provided with an elastic structure 121, which is used to provide support force and expansion space. The lining and / or the fixing portion are provided with a positioning step 112, which is used to coaxially position the lining in the optical system. The support column is provided with a fixing structure 221, which is used to fix the lens mount on the PCB board.

[0019] Working principle of the present invention: The present invention adopts the combination of an upper fixed part and a lower lining, wherein the lower end of the limiting ring of the fixed part is connected to the upper end of the lining, which can limit the vertical upward movement of the lining; the base of the lining is supported on the PCB board, and the base is provided with an elastic structure, which can keep the upper end of the lining at the lower end of the limiting ring and provide space for the lining's accommodating tube to expand downward; the lining is made of a material with a greater thermal expansion coefficient than the fixed part, and the base is more easily compressed than the accommodating tube, which can make the accommodating tube's thermal expansion degree greater than the fixed part in the vertical direction. Taking the above factors into consideration, when the ambient temperature rises, in the vertical direction, the fixed part expands upward after being heated, and the lining expands downward after being heated, forming thermal expansion compensation at the lens control point on the lining's accommodating tube, maintaining the lens installation height, and ensuring clear imaging of the optical imaging system.

[0020] [Example 2]

[0021] like Figure 3 As shown, the fixing portion can be a fully enclosed structure. If metal is used as the preparation material of the fixing portion, the lens mount can be provided with an electromagnetic shielding function.

[0022] [Example 3]

[0023] like Figure 4 As shown, the restriction ring may not have a gap, that is, the curling edge of the restriction ring is not segmented, which can prevent stress concentration on the restriction ring and increase the strength of the fixing portion.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal deformation adaptive lens mount, characterized in that: include: An inner liner, wherein the upper end of the inner liner is provided with a housing tube for accommodating the lens, and the lower end of the inner liner is provided with a base for supporting the PCB board; The fixing part includes a limiting ring and a support column, wherein the limiting ring is connected to the upper end of the support column; the lower end of the limiting ring is connected to the upper end of the liner to limit the vertical upward movement of the liner.

2. The thermally deformable adaptive lens mount according to claim 1, wherein: The lining is made of a material having a thermal expansion coefficient greater than that of the fixing portion.

3. The thermally deformable adaptive lens mount according to claim 1, wherein: The lower end of the inner side of the accommodating tube is provided with a thread for fixing the lens.

4. The thermally deformable adaptive lens mount according to claim 1, wherein: The base is provided with an elastic structure, and the elastic structure is used to provide support force and expansion space.

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