CN100472264C - Adjustable Lens Mount - Google Patents

Abstract

An adjustable lens device comprises a fixed seat, an adjusting seat sleeved outside the fixed seat, and a first lens chamber unit and a second lens chamber unit which are arranged on the fixed seat. The fixing seat is provided with a plurality of positioning blocks and a plurality of guide grooves extending along the axial direction, the adjusting seat is provided with an annular groove for the positioning blocks to be sleeved and positioned and a plurality of braking grooves which correspond to the guide grooves and extend spirally, and a plurality of guide pieces of the second lens chamber unit are arranged in the guide grooves and the braking grooves in a penetrating manner. The second lens chamber unit can achieve the purpose of zooming by operating the adjusting seat to rotate relative to the fixed seat and by using the braking groove to match with the guide piece.

Description

Adjustable Lens Mount

technical field

The invention relates to a lens, in particular to an adjustable lens device mounted on optical equipment.

Background technique

As shown in Figures 1 and 2, there is an existing projector lens device with zoom and focus functions, which includes a fixed seat 1, a set of adjustment seats 2 arranged inside the fixed seat 1, a set of adjustment seats installed on the fixed seat 1 a front group mirror room unit 3 at the front end and a rear group mirror room unit 4 installed at the rear end of the fixing seat 1. The fixing seat 1 is in the shape of a stepped hollow cylinder, and has two sets of guide grooves 101 extending axially and a set of stop grooves 102 arranged on one side of the guide grooves 101 along the circumferential direction. The adjustment seat 2 is also in the shape of a stepped hollow cylinder, and is rotatably installed inside the fixed seat 1, and has two sets of first detent grooves 201 that extend spirally, and one set of first detent grooves 201 that extend in a spiral manner. The second detent groove 202 extending in the opposite direction and a set of stoppers 203 installed on one side of the second detent groove 202 and passing through the detent groove 102, the first and second detents The grooves 201 and 202 correspond to the guide groove 101 . The front group mirror room unit 3 has a sleeve 301 and a set of front lens group 302 inside the sleeve 301. The sleeve 301 has a set that can pass through the second locking groove 202 and the guide groove 101. The front guide 303 and a set of chute 304, the front lens group 302 has a set of guide slides 305 that can pass through the chute 304, the rear group mirror room unit 4 has a first and a second lens group 401 , 402 , the first and second lens groups 401 , 402 each have a set of rear guides 403 that can pass through the first locking groove 201 and the guide groove 101 .

When the adjustment seat 2 is operated to rotate, the front and rear groups can be braked by using the cooperation of the second and the first brake grooves 202, 201, guide groove 101 and the front and rear guides 303 and 403. The mirror chamber units 3 and 4 are displaced toward each other or oppositely along the axial direction, so as to achieve the purpose of zooming. When the front lens group 302 is rotated, the purpose of focusing can be achieved.

Although, the above-mentioned lens device has zoom and focus functions, and by using the setting of the stop groove 102, the adjustment seat 2 can be axially positioned relative to the fixed seat 1, and the adjustment seat 2 can be restricted. the rotation angle. However, in order to achieve the above-mentioned axial positioning and limit the rotation angle, the stop groove 102 must be provided on the fixed seat 1, and a plurality of screw holes 203' must be drilled in cooperation with the adjustment seat 2 for the The locking and positioning of the above-mentioned limiting member 203 not only requires many components and a complex structure, but also requires more processing procedures for the components.

In addition, in order to axially position the adjustment seat 2 relative to the fixed seat 1 , the manufacturing and processing costs of providing the stop groove 102 on the fixed seat 1 will be relatively high.

Contents of the invention

The object of the present invention is to provide an adjustable lens device which can reduce components, simplify structure and reduce component processing costs.

The adjustable lens device of the present invention comprises a fixed base, a set of adjustment bases arranged outside the fixed base, a first mirror room unit installed on the fixed base, and a pair of first mirror room units also installed on the fixed base. The second mirror chamber unit on the mount. The fixing seat is made into a hollow cylinder, and has a peripheral wall surrounding an axis and defining an inner hole, a plurality of positioning blocks radially arranged on the peripheral wall, the peripheral wall has a first end, A second end portion opposite to the first end portion along the axis, and a plurality of guide grooves extending axially and arranged between the first end portion and the second end portion. The adjustment base is made into a hollow cylinder and is rotatably sleeved on the outside of the fixed base, and has a plurality of detent grooves corresponding to the axis extending helically, one is recessed in an inner ring surface and can be used for the positioning The ring groove that the block is sheathed in and a plurality of piercing parts that pass through the ring groove to the outside in the axial direction and correspond to the positioning block. The first mirror chamber unit is installed on the first end of the fixing seat, and has a first lens barrel and a plurality of lenses installed inside the first lens barrel. The second mirror room unit is installed in the second end of the fixing seat corresponding to the first mirror room unit, and has a second lens barrel, a plurality of lenses installed inside the second lens barrel and a plurality of The guide piece that protrudes from the second lens barrel and passes through the guide groove and the detent groove, the second mirror room unit is detented by the adjustment seat and can expand and contract relative to the fixed seat along the axis slide.

In this way, the positioning block passes through the threading part and is embedded in the ring groove, so that the adjustment seat can be axially positioned relative to the fixed seat, and the locking groove and the guide piece can be utilized to Cooperating, the rotation angle of the second mirror room unit can be limited, and the overall components are simplified, the structure is simple, and the manufacture and assembly are easy.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings.

Description of drawings

Fig. 1 is an exploded perspective view of a conventional lens device;

Fig. 2 is the combined sectional view of this kind lens device;

Fig. 3 is a three-dimensional exploded view illustrating a preferred embodiment of the adjustable lens device of the present invention;

Fig. 4 is a combined sectional view of the above-mentioned preferred embodiment of the present invention; and

FIG. 5 is a schematic diagram of a zooming operation of the above-mentioned preferred embodiment of the present invention, illustrating that operating an adjustment seat can cause a second mirror chamber unit to generate a relative displacement relative to a first mirror chamber unit.

Detailed ways

As shown in Fig. 3 and Fig. 4, the preferred embodiment of the adjustable lens device of the present invention includes a fixed base 10, a set of adjustment base 20 arranged outside the fixed base 10, and a screw mounted in the fixed base 10. The first mirror chamber unit 30 and a pair of second mirror chamber unit 40 that the first mirror chamber unit 30 is also installed in the fixing base 10 .

The fixing seat 10 is made into a hollow cylindrical shape, and has a peripheral wall 12 surrounding an axis L and defining an inner hole 11, a fixing portion 13 extending radially outward from the peripheral wall 12, and a plurality of ring devices. A positioning block 14 is disposed on the peripheral wall 12 and spaced apart from the fixing portion 13 , and a limiting portion 15 extends outward from a side end of the peripheral wall 12 along the axis L. As shown in FIG. The peripheral wall 12 has a first end portion 121, a second end portion 122 opposite to the first end portion 121 along the axis L, a plurality of axially extending and disposed on the first and second end portions 121, The guide groove 123 between 122 and the internal thread 124 that corresponds to the first end 121 and is provided on an inner peripheral surface, the second end 122 is in a step shape, and makes the inner hole 11 correspond to the second end The port of part 122 is gradually narrowed from the inside to the outside. The limiting portion 15 extends from the first end portion 121 and is in the shape of an arc plate, and has a first blocking edge 151 and a second blocking edge 152 opposite to the first blocking edge 151 .

The adjustment base 20 is also made into a hollow cylindrical shape, and can rotate moderately relative to the fixed base 10, and has a pair of positioning end portions 21 of the fixing portion 13, and a positioning end portion 21 opposite to the positioning end portion 21 along the axis L. The operating end portion 22 and a plurality of detent slots 23 are arranged between the positioning end portion 21 and the operating end portion 22 and extend helically corresponding to the axis L. As shown in FIG. The positioning end 21 has an annular groove 211 recessed on the inner ring surface for the positioning block 14 to sleeve, and a plurality of holes extending from the annular groove 211 to the outside in the axial direction and corresponding to the positioning block 14. The sleeve part 212, and the positioning block 14 can be sleeved into the ring groove 211 in the axial direction through the sleeve part 212, and after the adjustment seat 20 is rotated by an appropriate angle relative to the fixed seat 10 (as long as the The threading part 212 and the positioning block 14 are staggered), so that the adjustment seat 20 can be axially positioned relative to the fixing seat 10 .

The first mirror room unit 30 is used as the optical application of the front group mirror room in this embodiment, and has a first lens barrel 31, a plurality of lenses 32 installed inside the first lens barrel 31, and a plurality of lenses 32 located on the two sides. A spacer ring 33 between the two lenses 32, a pressure ring 34 screwed in the first lens barrel 31 and enabling the lens 32 to obtain an axial limit, a pressure ring 34 outside the pressure ring 34 and fixed on the first lens barrel 31. A protective cover 35 on the first lens barrel 31 and a positioning screw 36 mounted on the first lens barrel 31 correspond to the limiting portion 15 . The first lens barrel 31 has an external thread 311 that can be screwed on the internal thread 124. The screwing of the external and internal threads 311, 124 makes the first lens chamber unit 30 as a whole can be fixed relative to the internal thread 124. The seat 10 is adjusted along the axis L, and the rotation angle of the first mirror chamber unit 30 can be limited by the cooperation of the positioning screw 36 and the first and second retaining edges 151 , 152 .

The second mirror chamber unit 40 is installed in the second end portion 122 of the fixing base 10 corresponding to the first mirror chamber unit 30. Lens barrel 41, a plurality of lenses 42 installed inside the second lens barrel 41, a plurality of spacer rings 43 between the two lenses 42, a threaded in the second lens barrel 41 and make the lens 42 A pressure ring 44 for axial limitation and a plurality of guiding pieces 45 protruding from the second lens barrel 41 and passing through the guiding groove 123 and the locking groove 23 are obtained. The second lens barrel 41 is matched with the stepped second end portion 122 and also has a stepped barrel shape.

As shown in Figures 3 and 4, when the lens device is assembled, the second mirror chamber unit 40 is installed inside the fixing base 10, and the adjustment base 20 is sleeved outside the fixing base 10, Make the detent groove 23 symmetrical to the guide groove 123, and allow the guide piece 45 to pass through the guide groove 123 and the detent groove 23 at the same time, and use the positioning block 14 to be embedded in the ring groove 211, the adjustment seat 20 can be axially positioned relative to the fixed seat 10, and the adjustment seat 20 can be limited relative to the fixed seat 10 by the cooperation of the detent groove 23 and the guide piece 45. The angle that seat 10 rotates.

As shown in Figure 5 again, when the adjustment seat 20 is operated to rotate relative to the fixed seat 10, the detent groove 23 extends helically, the guide groove 123 extends axially, and the detent The groove 23 triggers the function of the guide member 45 , so that the second mirror chamber unit 40 as a whole is displaced relative to the first mirror chamber unit 30 along the axis L, so as to achieve the purpose of zooming. And if the adjustment seat 20 is rotated in the reverse direction again, the second mirror chamber unit 40 can be returned to the state shown in FIG. 4 .

And in the state shown in FIG. 4 and FIG. 5 , the first mirror chamber unit 30 is operated to rotate relative to the fixed base 10 , and the first and second retaining edges 151 , 152 on both sides of the limiting portion 15 and The cooperation of the positioning screw 36 can make the first mirror room unit 30 operate and adjust in a predetermined rotation angle.

Therefore, in the lens device of the present invention, the positioning block 14 is embedded in the ring groove 211, so that the adjustment seat 20 is axially positioned relative to the fixed seat 10, and the arrangement of the locking groove 23 can The rotation angle of the adjustment seat 20 relative to the fixed seat 10 is limited, and the structure of the positioning groove 14 and the ring groove 211 is simple, easy to manufacture and assemble, and the processing cost is low, and the overall components of the lens device are also compared with existing lenses. The device is relatively simplified and the manufacturing cost can be reduced. Furthermore, the present invention uses the cooperation between the positioning block 14 and the ring groove 211 to make the adjustment seat 20 produce axial positioning relative to the fixed seat 10, compared with the conventional method that must be provided on the fixed seat 1. If the stop groove 102 is provided, the manufacturing and processing costs of the present invention will be lower.

It is worth mentioning that, in the above-mentioned embodiment, the second mirror room unit 40 is used as the optical function of the rear group mirror room, and is displaced relative to the fixed seat 10 to achieve the purpose of zooming, but the same structure can also be used The displacement of the first mirror chamber unit 30 relative to the fixing seat 10 can also achieve the purpose of zooming (not shown). Moreover, the first mirror chamber unit 30 of the above-mentioned embodiment can be adjusted relative to the fixed base 10 along the axis L by utilizing the screwing of the external and internal threads 311, 124. A detent slot, a guide (not shown) is provided on the first mirror room unit 30, and the adjustment seat 20 is operated to simultaneously drive the first and second mirror room units 40 to face each other relative to the fixed seat 10. Or the opposite displacement can also achieve the purpose of zooming.

The above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the description of the invention are still the same. It belongs to the scope covered by the patent of the present invention.

Claims (7)

1. An adjustable lens device, characterized in that it comprises: A fixing seat is made into a hollow cylindrical shape, and has a peripheral wall surrounding an axis and defining an inner hole, a plurality of positioning blocks radially arranged on the peripheral wall, the peripheral wall has a first end, a a second end disposed along the axis opposite the first end and a plurality of axially extending guide slots disposed between the first end and the second end; An adjustment seat is made into a hollow cylindrical shape and is rotatably sleeved outside the fixed seat, and has a plurality of detent grooves extending helically corresponding to the axis, and an inner ring surface recessed in an adjustment seat for the The ring groove sheathed by the positioning block and a plurality of passing parts from the ring groove axially penetrated to the outside and corresponding to the positioning block; A first lens chamber unit is installed on the first end of the fixing seat, and has a first lens barrel and a plurality of lenses installed inside the first lens barrel; and A second mirror room unit, corresponding to the first mirror room unit, is installed in the second end of the fixing seat, and has a second lens barrel, a plurality of lenses installed inside the second lens barrel and a plurality of The guide piece that protrudes from the second lens barrel and passes through the guide groove and the detent groove, the second mirror room unit is detented by the adjustment seat and can expand and contract relative to the fixed seat along the axis slide. 2 . The adjustable lens device according to claim 1 , wherein the fixing seat further has a fixing portion extending outward from the peripheral wall, and the fixing portion is arranged at intervals on one side of the positioning block. 3 . 3. The adjustable lens device according to claim 2, wherein the adjustment base further has a positioning end corresponding to the fixing portion, an operating end disposed opposite to the positioning end along the axis, And the detent groove is set between the positioning end and the operating end, and the positioning end has the ring groove and the threading part. 4. The adjustable lens device according to claim 1, wherein the fixing seat further has an internal thread corresponding to the first end and is arranged on an inner peripheral surface of the peripheral wall, and the first mirror chamber unit The first lens barrel has an external thread, so that the first lens barrel of the first lens chamber unit is adjustable and screwed in the peripheral wall of the fixing base. 5. The adjustable lens device according to claim 4, wherein the fixing base further has a limiting portion extending outward from the first end of the peripheral wall along the axis, the limiting portion is in the form of a plate shape, and has a first baffle and a second baffle opposite to the first baffle, and the first mirror room unit has a pair of stoppers installed on the first lens barrel A positioning screw, which cooperates with the first retaining edge and the second retaining edge, can limit the rotation angle of the first mirror room unit. 6. The adjustable lens device according to claim 1, characterized in that, the first mirror chamber unit and the second mirror chamber unit each have at least one spacer ring positioned between two lenses and a ring mounted on The pressure rings in the first lens barrel and the second lens barrel enable the lenses to be axially limited. 7. According to the adjustable lens device according to claim 1, it is characterized in that the first mirror chamber unit is used as the optical application of the front group mirror chamber, and the second mirror chamber unit is used as the optical application of the rear group mirror chamber .

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