CN215240541U - Outer pressure ring pre-tightening mechanism - Google Patents

Abstract

The utility model relates to an optical lens structure field, concretely relates to outer clamping ring pretension mechanism for the lens outer clamping ring of solving among the prior art is twisted the fastening fixed mode and is easily made the lens produce cracked, and the difficult defect of quantization moment. The utility model comprises a fixed seat with a groove; the torque wrench connecting seat is arranged in the fixed seat; and at least one claw arranged around the fixed seat; the hook claw is provided with a protruding part which can be matched with the outer pressing ring and the groove of the fixing seat. The utility model is suitable for an outer clamping ring assembly of ray apparatus structure.

Description

Outer pressure ring pre-tightening mechanism

Technical Field

The utility model relates to an optical lens structure field, concretely relates to external pressure ring preloading mechanism.

Background

The lens clamping ring is an indispensable structural part in the optical-mechanical structure, the lens and the spacing ring are sequentially arranged in the lens cone when the lens cone is assembled, and finally the clamping ring is screwed in to mutually fix the parts, and the lens is broken due to the fact that the lens is made of brittle materials and the fixing moment is too large; the too small fixed moment then leads to the lens can not compress tightly, cause that lens stability is not good or appear cracked when carrying out mechanical test, so it is just very important to the axial pretightning force of lens to restrict through reasonable clamping ring tightening moment, and the outer clamping ring of lens, because the particularity of its structure, so the outer clamping ring can't carry out visual tightening fixed to its moment always, and the condition that adopts outer clamping ring is mostly because the clamping ring wall that the restriction of envelope space and lens size lead to is extremely thin or clamping ring appearance irregular shape, the structure is special and the size is great, it is fixed and fix according to original empirical data to be difficult to the dismouting.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at solve the lens outer pressure ring among the prior art and twist the fixed mode and easily make the lens produce cracked, and the difficult defect of quantifying moment.

According to the utility model discloses an aspect provides an outer clamping ring pretension mechanism, include: a fixed seat provided with a groove; the torque wrench connecting seat is arranged in the fixed seat; and at least one claw arranged around the fixed seat; the hook claw is provided with a protruding part which can be matched with the outer pressing ring and the groove of the fixing seat.

Preferably, the outer pressure ring pre-tightening mechanism further comprises a lens protection sleeve ring installed inside the fixed seat.

Preferably, the number of the fingers is 4.

The utility model has the advantages that: 1. compared with an external pressure ring screwing mode, the screwing torque is easy to quantify, and the lens cannot be extruded during screwing, so that the lens cannot be cracked; 2. the operability of the outer pressure ring in the assembling stage is enhanced, and the use safety of the lens is improved; 3. not only plays the quantization effect when the assembly to can assist the installation personnel to dismantle outer clamping ring, reduced the operating time of current technology, improved production efficiency.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a cross-sectional view of an external pressure ring pre-tightening mechanism according to an embodiment of the present invention;

fig. 2 is an exploded view of an external pressure ring pre-tightening mechanism in cooperation with a torque wrench according to an embodiment of the present invention.

Description of reference numerals: 1-hook claw; 2-torque wrench connecting seat; 3-fixing the base; 4-a lens protective collar; 5-outer pressing ring; 6-a lens; 7-torque wrench.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

< first embodiment >

The external pressure ring pre-tightening mechanism of one embodiment of the utility model is shown in figure 1 and comprises: a fixed seat 3 provided with a groove; the torque wrench connecting seat 2 is arranged in the fixed seat 3; and at least one claw 1 arranged around the fixed seat 3; the claw 1 is provided with a protruding part which can be matched with the outer pressing ring and the groove of the fixed seat. The outer pressing ring pre-tightening mechanism can also comprise a lens protection lantern ring 4 which is positioned inside the fixed seat 3 and arranged on the lens.

Fig. 2 shows a cross-sectional view of the device of fig. 1.

Specifically, the outer pressing ring 5 is used for fixing the lens, threads are arranged on the inner side of the outer pressing ring 5 and the edge of the lens 6, and the traditional mode is manual screwing, and the screwing mode has force tangential to the edge of the lens 6 and force for extruding the lens, and the mode can cause the thinner lens 6 to be cracked or deform to influence the imaging quality. Therefore the utility model provides a new pretension mode, the main part is fixing base 3, as shown in figure 1, can see that be provided with the recess on the fixing base 3 in figure 1, also has the recess on the outer clamping ring 5 simultaneously. The inner side of the claw 1 in fig. 1 is provided with a convex part, and the size and the length of the convex part are slightly larger than the size of the combination of the grooves of the fixed seat 3 and the outer pressing ring 5. When in use, the convex part of the hook claw 1 is clamped between the fixed seat 3 and the groove of the outer pressure ring 5. As shown in fig. 1, the hook claw can be fixed on the fixing base 3 by a plurality of screws, so that when the fixing base 3 rotates, the outer pressing ring 5 can be driven to rotate together by the action of the protruding part. In this way, only forces tangential to the outer edge of the lens 6 occur during the tightening process, and no forces directed from the edge of the lens 6 towards the lens telecentricity occur.

Further, if the tightening force is too great, too much compression force (perpendicular to the plane of the lens) is still generated, and the lens is deformed by the too much compression force. Therefore, the utility model discloses torque wrench connecting seat 2 has still been set up on fixing base 3 for connect torque wrench 7. The torque wrench 7 has an electronic display screen, which can reflect the tightening torque by reading. Therefore, for the same lens, the outer pressure ring 5 and the torque wrench 7, the proper torque can be predetermined through testing, the reading is recorded, and then whether the lens is screwed down or not is judged by referring to the reading in actual use, so that the time for batch screwing can be greatly shortened, and the process flow is optimized.

Therefore, the utility model solves the problem that the quantized installation torque is difficult to realize due to the poor assembly and disassembly of the thin-wall, large-size and irregular-appearance outer pressing ring. And the plurality of hooks 1 uniformly distributed on the circumference apply force to reduce the surface stress of the outer pressing ring and reduce the deformation of the pressing ring.

< second embodiment >

The embodiment provides an external pressure ring pre-tightening method which is realized based on the external pressure ring pre-tightening mechanism of the first embodiment. The method of the present embodiment includes: arranging an outer pressing ring on the lens; matching the convex part on the hook claw with the outer pressing ring and the groove of the fixed seat; installing a torque wrench on a torque wrench connecting seat, and rotating the torque wrench to enable an outer pressing ring to be screwed tightly on the lens; when the torque wrench is rotated, the pressure of the outer pressure ring on the lens is adjusted according to the reading on the torque wrench, so that the reading is not more than a preset threshold value all the time.

Further, before the above steps are executed, the following steps may be further included: predetermining a torque value required for screwing the outer pressure ring; when the torque wrench is rotated, when the reading of the torque wrench reaches the torque value, the outer pressing ring is judged to be in a screwing state, and the torque wrench is stopped rotating.

< example >

The schematic diagram of the present embodiment is shown in fig. 1 and fig. 2, and includes: the lens protection device comprises a hook claw 1, a torque wrench connecting seat 2, a fixing seat 3 and a lens protection lantern ring 4. Install moment spanner connecting seat 2 in fixing base 3, the mounted position around fixing base 3 is installed to hook 1, and fixing base internally mounted lens protects lantern ring 4, during the use with the moment spanner insert in moment spanner connecting seat 2 can.

This embodiment places the clamping ring in fixing base 3 through the recess cooperation of hook 1 with outer clamping ring, will be visual external clamping ring moment spanner and external clamping ring as a whole installation on the camera lens this moment, through manual rotatory fixing base 3, the outer clamping ring of screw in compresses tightly to the lens direction simultaneously, treat that the external clamping ring is when the lens contact, the clamping ring is screwed up in fixing base 1 and application of force to installation moment spanner, the tightening moment of the outer clamping ring is come to the reading of accessible observation moment spanner this moment, and adjust the pressure of clamping ring to the lens with this, make the lens atress be unlikely to too big and produce too big internal stress, in order to avoid mirror surface deformation to influence optical imaging quality or because too big internal stress and cracked.

The lens dismantlement process is installed on the lens through the recess cooperation of knuckle 1 and the outer clamping ring of camera lens with visual camera lens pressure ring moment spanner, installs moment spanner in fixing base 3 and the application of force comes the unscrewing clamping ring this moment, can directly rotate the spanner with the hand when waiting that moment is less to pull down the outer clamping ring.

In the embodiment, the outer pressing ring needs to be cut into a groove matched with the position and the size of the hook claw, and the pressing ring can be placed in the fixed seat 3 only by matching the size of the outer ring of the pressing ring with the size of the inner ring of the tool; the hook claw 1 is connected with the fixing seat 3, the boss position of the hook claw 1 is matched with the U-shaped groove of the fixing seat 3, the 4 hook claws 1 can be adjusted in the U-shaped groove, and the hook claw is guaranteed to be in contact with the pressing ring groove to reduce stress concentration.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (3)

1. An outer pressure ring pre-tightening mechanism is characterized by comprising:

a fixed seat provided with a groove;

the torque wrench connecting seat is arranged in the fixed seat; and

at least one claw arranged around the fixed seat; the hook claw is provided with a protruding part which can be matched with the outer pressing ring and the groove of the fixing seat.

2. The outer pressure ring pre-tightening mechanism according to claim 1, further comprising:

install the lens protection lantern ring in the fixing base inside.

3. The outer pressure ring pre-tightening mechanism as claimed in claim 1, wherein the number of the hooks is 4.

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