CN1847910A - Adjustable objective lens group - Google Patents

Abstract

An adjustable objective lens set comprises an outer cylinder, a rotary component sleeved with the outer cylinder, an objective lens component accommodated in the rotary component in a displaceable manner, a decorative ring component fixedly connected with the rotary component, and a limiting component. The limiting component is provided with a pressing ring which can be movably positioned in the decoration ring component and is pressed against one end of the objective lens component, and an elastic component which is accommodated between the outer cylinder and the other end of the objective lens component. Therefore, the objective lens assembly is positioned between the elastic assembly and the pressing ring, and the distance between the objective lens assembly and the outer barrel can be adjusted by matching the positioning position of the pressing ring and the elastic acting force of the elastic assembly.

Description

Adjustable objective lens group

technical field

The invention relates to an objective lens group, in particular to an adjustable objective lens group which can adjust the relative distance.

Background technique

Referring to Fig. 1, general objective lens group 1 can be installed on the collimator 2, collimator 2 has an end 21 that connects objective lens group 1, connects the other end 23 of an eyepiece group 22, and is arranged on objective lens group 1 and eyepiece group An upright group of 22 rooms (not shown).

Referring to FIG. 2 and FIG. 3 , the objective lens set 1 mainly includes an outer cylinder 11 , a swivel ring 12 , an objective lens assembly 13 , a decorative ring assembly 14 , and a stop assembly 15 .

The swivel ring 12 is screwed with the outer cylinder 11 and can be displaced along an axis X during the rotation process.

The objective lens assembly 13 is accommodated in the outer cylinder 11 and can be displaced along the axis X with a limited stroke, and has an objective lens barrel 131 surrounding the axis X, and two objective lenses 132 fixed in the objective lens barrel 131 .

The bezel assembly 14 has a bezel 141 surrounding the axis X and a color ring 142 . Part of the decorative ring 141 is screwed to the inner surface 121 of the slewing ring 12 and can be used to decorate the whole. The color ring 142 is respectively adjacent to the rotary ring 12 and the decorative ring 142 along the axis X direction, so as to prevent the thread from being seized when the decorative ring 141 and the rotary ring 12 are screwed together. At the same time, different colors from the decorative ring 141 and the rotary ring 12 can be used. And has a decorative effect.

The limiting component 15 has a pressure ring 151 surrounding the axis X and an elastic component 152 . The pressure ring 151 is screwed on an inner surface 121 of the rotary ring 12 and abuts against one end of the objective lens barrel 131 . The elastic component 152 is accommodated in the outer tube 11 and pressed against the other end of the objective lens barrel 131 , so that the objective lens component 13 is kept against the pressing ring 151 .

Referring to Fig. 1 and Fig. 3, when the user rotates the rotary ring 12 to move along the axis X direction, it will synchronously drive the pressure ring 151 and the decorative ring 142, so that the pressure ring 151 moves forward or backward along the axis X direction. At this time, The elastic component 152 can make the objective lens component 13 move along the axis X direction in the outer tube 11 by virtue of the elastic force and the forward and backward displacement of the pressing ring 151 , so as to achieve the purpose of adjusting the focal length. However, although the above-mentioned structure has the function of focusing, it still has the following deficiencies in actual manufacture, which need to be solved urgently:

1. In order to make the focal length of the object more accurate, the distance between the objective lens assembly 13 and the eyepiece assembly 22 can be changed by changing the threading depth of the pressure ring 151 and the slewing ring 12 before the general optical device such as the collimator 2 leaves the factory , and then adjust the parallax. However, the objective lens assembly 13 will cooperate with different optical devices and has a specific total length. Therefore, when the total length is constant and the pressure ring 151 and the decorative ring 142 are screwed on the inner surface 121 of the rotary ring 12 at the same time, the pressure ring 151 will be limited by other components, so that the distance L1 that can be used for parallax adjustment is quite short, and there is insufficient margin for parallax adjustment, which affects the lack of focus accuracy.

2. Furthermore, when adjusting the parallax, the decorative ring 142 must be removed to adjust the screwing depth of the pressure ring 151 and the swivel ring 12, which is quite inconvenient and time-consuming for adjustment and maintenance.

3. And under the condition that the total length remains unchanged, the slewing ring 12 must have sufficient length to be screwed with the outer cylinder 11, the pressure ring 151 and the decorative ring 142. Therefore, the variability of the position is not large, and assuming the parallax There is no error in the accuracy, although the distance L1 for parallax adjustment can be omitted, but because the distance L1 is quite short, the allowable range of change in the appearance length of the slewing ring 12 is relatively small, so it is difficult for the slewing ring 12 to have an appearance design. Changes, and usually cannot take into account the overall aesthetics of the appearance and shape, and there is a lack of limited appearance and shape.

Contents of the invention

The purpose of the present invention is to provide an adjustable objective lens group which is more variable and can expand the adjustment margin of parallax.

The feature of the present invention is that the adjustable objective lens group includes: an outer tube, a rotary assembly, an objective lens assembly, a decorative ring assembly and a limiting assembly. The outer cylinder has a ring wall surrounding an axis and defining an objective lens chamber. The rotary assembly has a rotary ring surrounding the axis, and the rotary ring fits with the outer cylinder and can be displaced along the axis. The objective lens assembly is displaceably accommodated in the objective lens chamber, and has an objective lens barrel surrounding the axis, and an objective lens fixed in the objective lens barrel. The decorative ring assembly has a decorative ring surrounding the axis, and the decorative ring is fixedly connected with the rotary assembly along the axial direction. The limit assembly has a pressing ring and an elastic assembly. The pressing ring is displaceably positioned in the decorative ring along the axial direction and pressed against one end of the objective lens barrel. end, and a pressing end against the other end of the objective lens barrel, so that the objective lens assembly is positioned between the elastic assembly and the pressure ring.

The invention has the functions of improving the focusing accuracy and the simplicity of adjustment and maintenance, and making the appearance more variable.

Description of drawings

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a front view illustrating a general sight.

Fig. 2 is an exploded view illustrating an objective lens group of the aforementioned collimator.

Fig. 3 is a cross-sectional view illustrating the structural relationship of the aforementioned objective lens group.

FIG. 4 is an exploded perspective view illustrating a preferred embodiment of an adjustable objective lens group of the present invention.

Fig. 5 is an exploded view illustrating a rotary assembly, an objective lens assembly, a ring assembly and a limiting assembly in a preferred embodiment.

Fig. 6 is a cross-sectional view illustrating the combination of the preferred embodiment.

Figure 7 is a cross-sectional view illustrating the length variation in a preferred implementation.

Detailed ways

Referring to Fig. 4, the preferred embodiment of the adjustable objective lens group of the present invention is installed on the collimator (not shown) equally, comprises: an outer tube 3, a rotary assembly 4, an objective lens assembly 5, a decorative ring Component 6 and a limiting component 7.

Referring to Fig. 5, Fig. 6, be respectively the exploded view of the present invention, cross-sectional view, outer tube 3 has around an axis X and defines a ring wall 32 of an object lens chamber 31, is arranged on a first ring wall 32 outer surface 321 A stopper 33 and a limit bolt 34 passing through the first stopper 33 and screwing through an inner surface 322 of the ring wall 32 , so that the first stopper 33 is fixed on the outer surface 321 of the ring wall 32 .

The rotary assembly 4 has a rotary ring 41 surrounding the axis X, and a second stopper 42 . The slewing ring 41 is screwed with the outer cylinder 3 and can be displaced along the axis X direction. The second stopper 42 is threaded through an inner surface 411 of the swivel ring 41 relative to the first stopper 34 . The slewing ring 41 can rotate forward and reverse around the ring wall 32 of the outer cylinder 3, so that the second stopper 42 can be displaced relative to the first stopper 33 to stop each other, thereby limiting the rotatable angle of the slewing ring 41 to less than 360 degrees.

The objective lens assembly 5 is displaceably accommodated in the objective lens chamber 31 and has an objective lens barrel 51 and two objective lenses 52 . The objective lens barrel 51 has a groove 512 formed on an outer surface 511 and extending along the parallel axis X direction, an inner surface 513 opposite to the outer surface 511, a first pressing formed at one end and passing through the objective lens chamber 31 end 514, and a second pressing end 515 formed at the other end and opposite to the first pressing end 514. The slot 512 is used for the limit bolt 34 to pass through. The aforementioned objective lens 52 is fixed on the inner surface 513 of the objective lens barrel 51 .

The bezel assembly 6 has a bezel 61 and a color ring 62 surrounding the axis X. The decorative ring 61 is screwed to the rotary ring 41 along the axis X direction. The color rings 62 are respectively adjacent to the rotary ring 41 and the decorative ring 61 along the axis X direction, so as to prevent the thread from being seized when the decorative ring 61 and the rotary ring 41 are screwed together. At the same time, different colors from the decorative ring 61 and the rotary ring 41 can be used. And has a decorative effect.

The limiting component 7 has a pressure ring 71 surrounding the axis X, an elastic component 72 , and a positioning bolt 73 . The pressing ring 71 is screwed in the decorative ring 61 and pressed against the first pressing end 514 of the objective lens barrel 51 , so that the positioning position of the pressing ring 71 along the axis X direction can be adjusted by the screwing depth. Elastic component 72 is a compression spring in this embodiment, is accommodated in the objective lens chamber 31 of outer tube 3, and has a positioning end 721 positioned on the ring wall 32, and is pressed against the second pressing end of objective lens barrel 51 A pressing end 722 on 515 enables the objective lens assembly 5 to be positioned between the elastic assembly 72 and the compression ring 71 . The positioning bolt 73 is threaded through the decorative ring 61 and pressed against the pressure ring 71, so that the pressure ring 71 is positioned.

When the user rotates the rotary ring 41 to move along the axis X direction, it will synchronously drive the decorative ring 61 and the pressure ring 71 inside the decorative ring 61, so that the pressure ring 71 can move toward the right side of the drawing along the axis X direction, and push Squeeze the objective lens barrel 51 to compress the elastic assembly 72 until the left side of the channel 512 is blocked by the stop bolt 34, so that the distance between the objective lens 52 and the eyepiece assembly (not shown) is shortened; or the pressure ring 71 can face the drawing along the axis X direction The left side moves back, so that the objective lens barrel 51 is pushed to the left by the elastic recovery force of the elastic component 72 and moves back to the left side of the drawing, and keeps abutting against the pressure ring 71 until the right side of the channel 512 is blocked by a limit position Bolts 34 extend the distance between the objective lens 52 and the eyepiece assembly (not shown), so as to achieve the purpose of adjusting the focal length of the object.

Referring to Fig. 6 and Fig. 7, it is worth mentioning that the slewing ring 41 only needs to be screwed with the outer cylinder 3 ring wall 32 and the decorative ring 61, and the pressure ring 71 is separately screwed in the decorative ring 61, therefore, the slewing ring 41 In terms of design, it is no longer limited by the position of the pressure ring 71, but can have larger changes in length and position with the outer cylinder 3 and the decorative ring 61. As shown in Figure 6, the length D1 of the rotary ring 41 is obviously The length D1 of the swivel ring 41 is slightly shorter than the length D2 of the ornament ring 61, and the length of the outer cylinder 3 is shorter as shown in FIG. 7 .

What is important is that the pressure ring 71 is not limited by other components, and has a relatively large screwing stroke with the decorative ring 61 as the distance L2 for parallax adjustment. When the pressure ring 71 and the decorative ring 61 change the distance between the objective lens assembly 5 and the eyepiece assembly (not shown) by changing the screwing depth, a larger parallax adjustment distance L2 can be used to expand the adjustable range of parallax .

And when adjusting the parallax, only need to loosen the positioning bolt 73 without removing any components, the screwing depth of the pressure ring 71 and the decorative ring 61 can be adjusted.

As can be seen from the foregoing, the adjustable objective lens group of the present invention has the following advantages and effects:

1. The distance L2 that can be used for parallax adjustment in the present invention is significantly longer. Therefore, when the total length remains unchanged, there is still ample margin for parallax adjustment, which can make the focal length of the object more accurate, making the present invention more practical sex.

2. Moreover, the present invention can directly change the screwing depth of the pressure ring 71 and the decorative ring 61 to achieve the purpose of adjusting the parallax, which is not only very simple and convenient for adjustment and maintenance, but also saves time and reduces costs.

3. Since the pressure ring 71 is separately screwed in the decorative ring 61, the design of the slewing ring 41 is no longer limited by the position of the pressure ring 71, but can be compared with the outer cylinder 3 and the decorative ring 61 in terms of length and position. There is a large change on the surface, and the present invention has quite ample margin for parallax adjustment, and the allowable range of change in appearance length and position is relatively large, and the overall length can even be shortened under the condition of sufficient adjustment margin, so that the present invention can Taking into account the overall aesthetics of the appearance and shape.

Claims (7)

1. An adjustable objective lens group is characterized in that it comprises: An outer cylinder has an annular wall surrounding an axis and defining an objective lens chamber; A rotary assembly has a rotary ring around the axis, the rotary ring fits on the outer cylinder and can be displaced along the axis; An objective lens assembly is displaceably accommodated in the objective lens chamber, and has an objective lens barrel surrounding the axis, and an objective lens fixed in the objective lens barrel; A decorative ring assembly, having a decorative ring around the axis, the decorative ring is fixedly connected with the rotary assembly along the axial direction; and A position limiting component has a pressure ring and an elastic component, the pressure ring is positioned in the decorative ring displaceably along the axis direction, and is pressed against one end of the objective lens barrel, the elastic component is accommodated in the objective lens chamber, and has a position on the outer cylinder A positioning end of the object lens barrel and an abutting end abutting against the other end of the objective lens barrel enable the objective lens assembly to be positioned between the elastic assembly and the compression ring. 2 . The adjustable objective lens set according to claim 1 , wherein the decorative ring and the pressing ring are screwed together, so that the positioning position of the pressing ring along the axial direction can be adjusted by the screwing depth. 3 . 3 . The adjustable objective lens group according to claim 1 , wherein the limit assembly further has a positioning bolt, and the positioning bolt is threaded through the decorative ring and pressed against the pressure ring, so that the pressure ring is positioned. 4 . 4. The adjustable objective lens group according to claim 1, characterized in that, the rotary ring of the rotary assembly is screwed together with the outer cylinder, and can move the decorative ring and the pressure ring along the axial direction during the rotation process, The objective lens assembly is subjected to the elastic force of the elastic assembly, and is relatively displaced along the axial direction. 5. The adjustable objective lens group as claimed in claim 4, wherein the outer cylinder also has a first stop fixed on an outer surface of the ring wall, and the rotary assembly also has a position opposite to the first stop formed on the first stop. A second stopper on the inner surface of the slewing ring. The second stopper is displaced relative to the first stopper during the forward and reverse rotation of the slewing ring to stop each other so that the slewing ring can rotate The angle is less than 360 degrees. 6. adjustable objective lens group as claimed in claim 1, is characterized in that, objective lens assembly also has a stop bolt, and objective lens barrel has a channel that is formed on an outer surface and extends along the parallel axis direction, stop bolt It is threaded through the outer cylinder and protrudes into the channel. 7 . The adjustable objective lens group according to claim 1 , wherein the ornamental ring assembly further has a color ring surrounding the axis, and the color ring is respectively adjacent to the rotary ring and the ornamental ring along the axial direction.

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