TWM496782U - Zoom lens and its elastic guiding device - Google Patents

Description

Zoom lens and its elastic guiding device

The present invention relates to a lens accessory, and more particularly to a zoom lens and an elastic guiding device thereof.

As shown in FIG. 5 and FIG. 6 , the conventional zoom lens 40 includes an outer ring 41 , an inner ring 42 , a plurality of guiding devices 43 , and a plurality of lens groups 44 . The outer ring 41 is sleeved outside the inner ring 42 . The outer ring 41 is provided with a plurality of guiding grooves 411 extending through the outer ring 41, and the inner ring 42 is concavely provided with a plurality of receiving grooves 421 respectively for respectively guiding the guiding grooves 411. The guiding device 43 is disposed on the inner ring 42 and extends into each of the guiding grooves 411 and the receiving grooves 421. Each guiding device 43 includes a ring 431 and a bolt 432. The ring 431 is sleeved on the inner ring 42. The bolt 432 extends into the corresponding guiding groove 411 and is coupled to the inner ring 42 . The collar 431 is disposed between the bolt 432 , the guiding groove 411 and the receiving groove 421 to provide The bolts 432 have a firm guiding force, and each lens group 44 is disposed in the inner ring 42.

However, the existing collar 431 is a closed annular shape. The assembly is inserted into the guiding groove 411 and the receiving groove 421, and the bolt 432 is passed through the collar 431. In the inner ring 42 , a gap may exist between the collar 431 and the guiding groove 411 and the receiving groove 421 , so that the collar 431 cannot be disposed in the receiving groove 421 in a tight fit manner. The guiding groove 411 is so that when the inner ring 42 is rotated relative to the outer ring 41, the guiding device 43 does not provide a stable guiding effect, and the lack is necessary for improvement.

In order to solve the problem that the guiding device of the existing zoom lens cannot provide a stable guiding function, the main object of the present invention is to propose a zoom lens and an elastic guiding device thereof that can solve the problems of the prior art.

An elastic guiding device proposed by the present invention comprises: a set of rings having elasticity in a circumferential direction and having a circular tubular shape, the collar comprising a dividing groove extending through the collar in a longitudinal direction of the collar a wall; and a fixing bolt that penetrates into the collar.

The elastic guiding device, wherein the collar further comprises an abutting wall protrudingly formed on an inner wall of the collar, the fixing bolt abutting against the abutting wall.

The zoom lens of the present invention comprises: an inner ring comprising a plurality of guiding grooves, each guiding groove is long straight and parallel to the axial direction of the inner ring and penetrates the wall surface of the inner ring; a ring sleeved outside the inner ring and selectively rotating relative to the inner ring, the outer ring includes a plurality of guiding holes, each guiding hole has an elongated arc shape and penetrates the outer ring, and each guiding hole system Parallel to the axial extension of the outer ring, each guiding hole respectively aligns with each ring groove; a plurality of lens groups are disposed in the inner ring, each lens set includes a fixing ring and at least one lens The fixing ring is disposed in the inner ring, and includes a plurality of collar grooves, each ring groove is recessed in the fixing ring, and each ring groove is respectively aligned with each guiding groove, and the at least one lens is disposed at the fixing And a plurality of elastic guiding devices respectively disposed in the guiding holes, the guiding grooves and the sleeve grooves, each elastic guiding device comprising a ring and a fixing bolt, wherein the ring The circumferential direction is elastic and is round and tubular, and the collar is tightly fitted Provided in one of the guide holes, the guide groove corresponding to the guide hole, and the collar groove corresponding to the guide groove, the collar includes a section groove extending through the longitudinal direction of the collar a wall of the collar through which the fixing bolt penetrates and is coupled to the inner ring.

In the zoom lens, each of the collars further includes an abutting wall protrudingly formed on an inner wall of the collar, and the corresponding fixing bolt is abutted against the abutting wall.

According to the above technical means, the achievable improvement of the present invention is that the collar of the elastic guiding device has a groove, so that the collar has elasticity in the circumferential direction, and the outer diameter of the collar can be appropriately reduced, and the zoom is assembled. In the case of the lens, the force is applied to the collar to reduce the outer diameter to the extent that the guide hole, the guide groove and the collar groove can be placed, and the inertia of the rear collar is provided to extend the collar outwardly. The sleeve is closely engaged with the guiding hole, the guiding groove and the collar groove, so when the inner ring rotates relative to the outer ring, and each lens group moves relative to the inner ring, each elastic guiding device can Provides a solid guiding force.

In order to be able to understand the technical features and practical functions of the present invention in detail, and in accordance with the contents of the specification, the following further describes the preferred embodiments as illustrated in the drawings.

Referring to FIG. 1 to FIG. 3 , the zoom lens 10 of the present invention includes an inner ring 11 , an outer ring 12 , a plurality of lens groups 13 , and a plurality of elastic guiding devices 20 . The outer ring 12 is sleeved on the outer ring 12 . The outer ring 12 is rotatable relative to the inner ring 11 , and the outer ring 12 includes a plurality of guiding holes 121 . Each guiding hole 121 has an elongated arc shape and penetrates the outer ring 12 . The inner ring 11 includes two guiding grooves 111, each guiding groove 111 is long straight and parallel to the axial direction of the inner ring 11 and penetrates the wall surface of the inner ring 11, and each guiding groove 111 is located in the radial direction of the inner ring 11 respectively. Each of the guiding slots 111 is connected to each of the guiding holes 121, and each lens group 13 is disposed in the inner ring 11. Each lens group 13 includes a fixing ring 131 and at least one lens 132. The inner ring 11 is disposed in the inner ring 11 and includes two ring grooves 1311. Each ring groove 1311 is recessed in the fixing ring 131, and each ring groove 1311 is respectively connected to each guiding groove 111. The at least one lens 132 is disposed at the inner ring 11. Inside the retaining ring 131.

Each of the elastic guiding devices 20 is disposed in each of the guiding holes 121, the guiding grooves 111 and each of the ring grooves 1311. Each elastic guiding device 20 includes a ring 21 and a fixing bolt 22, and the collar 21 is The collar is elastic and has a circular tubular shape. The collar 21 includes a groove 211 and an abutting wall 212. The groove 211 extends through the wall surface of the collar 21 in the longitudinal direction of the collar 21, so that the collar C-shaped and having a circumferential direction of elasticity, the abutting wall 212 is formed on the inner wall of the collar 21, and the collar 21 is disposed in one of the ring grooves 1311, corresponding to the collar groove 1311. The guiding groove 111 and the guiding hole 121 corresponding to the guiding groove 111 are in a tightly fitting state between the collar 21 and the corresponding collar groove 1311, the guiding groove 111 and the guiding hole 121, and the fixing bolt 22 It penetrates into the collar 21 and is coupled to the inner ring 11 and abuts against the abutting wall 212.

In use, the outer ring 12 is rotated to move the elastic guiding devices 20 along the guiding holes 121. Since the elastic guiding devices 20 are fixed in the ring grooves 1311, the elastic guiding devices 20 will The movement is performed along each of the guide grooves 111 and the respective guide holes 121, so that the groups 13 of the respective lenses 132 can linearly move in the inner ring 11 along the respective guide grooves 111, thereby performing zooming.

As shown in FIG. 4, since the collar of each elastic guiding device 20 is not installed in the collar groove 1311, the guiding groove 111 and the guiding hole 121, it is C-shaped. Preferably, at this time, The outer diameter of the collar is 4.2 mm. When the elastic guiding device 20 is assembled, the collars are first placed into the collar groove 1311, the guiding groove 111 and the guiding hole 121, preferably The inner diameter of the ring groove 1311 is 4 mm, and the width of the guiding groove 111 and the guiding hole 121 are both 4 mm. Since the collar has the groove 211 and can have elasticity in the circumferential direction, The circumferential direction of the collar can be compressed to form a smaller outer diameter, the outer diameter of the collar can be reduced to 4 mm or less, and can be placed into the collar groove 1311, the guide groove 111 and the guide In the pilot hole 121, after the collar is set, the inertia of the collar itself drives the collar to open outward, so that the collar and the collar groove 1311, the guiding groove 111 and the guiding hole 121 are tightly engaged. Then, the fixing bolts 22 are passed through the respective collars and joined to the inner ring 11, so that the problem of having a gap between the collar and the collar groove 1311, the guide groove 111 and the guide hole 121 can be eliminated. Flexible guide means 20 may provide a robust guiding action.

10‧‧‧ zoom lens
11‧‧‧ Inner Ring
111‧‧‧ Guide slot
12‧‧‧Outer Ring
121‧‧‧ Guide hole
13‧‧‧ lens group
131‧‧‧Fixed ring
1311‧‧‧ring groove
132‧‧‧ lenses
20‧‧‧Flexible guide
21‧‧‧ collar
211‧‧‧"
212‧‧‧ against the wall
22‧‧‧ fixing bolts
40‧‧‧ zoom lens
41‧‧‧Outer Ring
411‧‧‧ Guide groove
42‧‧‧ Inner Ring
421‧‧‧ accommodating slots
43‧‧‧Guide
431‧‧‧ collar
432‧‧‧ bolt
44‧‧‧ lens group

1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a cross-sectional side view of a preferred embodiment of the present invention. Figure 3 is a partial perspective view of the preferred embodiment of the present invention. 4 is a schematic view of the assembly of the preferred embodiment of the present invention. FIG. 5 is an exploded perspective view of a conventional zoom lens. 6 is a partial perspective view of a conventional zoom lens.

10‧‧‧ zoom lens

11‧‧‧ Inner Ring

111‧‧‧ Guide slot

12‧‧‧Outer Ring

121‧‧‧ Guide hole

13‧‧‧ lens group

1311‧‧‧ring groove

132‧‧‧ lenses

20‧‧‧Flexible guide

21‧‧‧ collar

22‧‧‧ fixing bolts

Claims (4)

An elastic guiding device comprising: a set of rings having elasticity in a circumferential direction and having a circular tubular shape, the collar comprising a dividing groove extending through a wall surface of the collar in a longitudinal direction of the collar; And a fixing bolt that penetrates into the collar. The elastic guiding device of claim 1, wherein the collar further comprises an abutting wall protrudingly formed on an inner wall of the collar, the fixing bolt abutting against the abutting wall. A zoom lens includes: an inner ring including a plurality of guiding grooves, each guiding groove is long straight and parallel to an axial direction of the inner ring and penetrates a wall surface of the inner ring; an outer ring, a sleeve thereof Provided outside the inner ring and selectively rotating relative to the inner ring, the outer ring includes a plurality of guiding holes, each guiding hole has an elongated arc shape and penetrates the outer ring, and each guiding hole is parallel to the outer ring The axial extension of the ring, each guiding hole respectively aligns with each ring groove; a plurality of lens groups are disposed in the inner ring, each lens set includes a fixing ring and at least one lens, the fixing ring system The inner ring is disposed in the inner ring, and includes a plurality of collar grooves, each ring groove is recessed in the fixing ring, and each of the ring grooves respectively aligns the guiding grooves, and the at least one lens is disposed in the fixing ring; a plurality of elastic guiding devices respectively disposed in each of the guiding holes, each guiding groove and each ring groove, each elastic guiding device comprising a set of rings and a fixing bolt, wherein the ring has a circumferential direction Elastic and linear, the collar is tightly fitted to one of the guide holes, corresponding to a guiding groove of the guiding hole and a collar groove corresponding to the guiding groove, the collar includes a cutting groove, the cutting groove penetrates a wall surface of the collar along a longitudinal direction of the collar, and the fixing bolt penetrates the The collar is incorporated into the inner ring. The zoom lens of claim 3, wherein each of the collars further comprises an abutting wall protrudingly formed on an inner wall of the collar, and the corresponding fixing bolt is abutted against the abutting wall.