CN102645720A - Zoom Lens Module - Google Patents

Abstract

The invention provides a zoom lens module, which includes a fixed seat with a supporting surface, a transmission cam, a first lens group and a second lens group provided with a zoom rod. The zoom lever is located behind the supporting surface. When the zoom lever is moved, the first lens group and the second lens group can be driven to move relative to the fixed base to achieve the purpose of zooming.

Description

Zoom Lens Module

technical field

The present invention relates to a zoom lens module, and in particular to a zoom lens module with a zoom rod behind a lens bearing surface.

Background technique

The zoom rods of traditional zoom lenses are all designed in front of the lens support surface, and most of them provide users with zooming operations in the form of rods. Users can toggle the zoom rod to make the transmission cam rotate, and drive the roller to make the two More than two mirror chambers are connected to achieve the purpose of zooming.

Figure 1a is an exploded perspective view of a conventional zoom lens module. Fig. 1b is a three-dimensional combined view of a conventional zoom lens module. Figure 1c is a cross-sectional view of a conventional zoom lens module.

As shown in FIGS. 1 a - 1 c , the zoom lens module 1 includes a fixing base 10 , a driving cam 12 , a first lens group 14 , a second lens group 16 , and a focusing group 18 . For the convenience of description, the direction of the central axis of the zoom lens module 1 is defined as the X direction, and the direction of rotation around the central axis is defined as the Y direction.

The fixing seat 10 is an annular wall, including a first linear groove 101 , a second linear groove 102 , and a supporting surface 103 . The first linear groove 101 and the second linear groove 102 extend in the X direction, and the first linear groove 101 and the second linear groove 102 may have different extension lengths. The supporting surface 103 is used to fix the zoom lens module 1 to an external peripheral device (not shown).

The transmission cam 12 is also an annular wall, and a first curved groove 121 , a second curved groove 122 , and a zoom lever 123 are formed on the wall. Both the first curved groove 121 and the second curved groove 122 extend in the X direction and the Y direction at the same time, but as shown in FIG. 1a, the first curved groove 121 and the second curved groove 122 have different extension directions respectively. . The zoom lever 123 is a rod-shaped structure formed on the outer wall of the circular wall of the transmission cam 12 , and the user can toggle the zoom lever 123 to rotate the transmission cam 12 along the Y direction.

The first lens group 14 has a locking interface 141, and the driving roller 15 can pass through the first curved groove 121 of the transmission cam 12 and the first linear groove 101 of the fixing seat 10 to be locked on the locking interface 141 during assembly. . The inside of the first lens group 14 further holds a lens 143 , and the lens 143 and the space inside the first lens group 14 form a mirror chamber.

The second lens group 16 has a locking interface 161 and a third curved groove 162. During assembly, the driving roller 17 can pass through the second curved groove 122 of the transmission cam 12 and the second linear groove 102 of the fixed seat 10 to lock on the locking interface 161 . The inside of the second lens group 16 further holds a lens 163 , and the lens 163 and the space inside the second lens group 16 form a mirror chamber.

The focusing group 18 has a locking interface 181, which can be locked on the locking interface 181 by driving the roller 17 through the third curved groove 162 of the second lens group 16, so that the focusing group 18 can be fixed relative to the second lens group 16. spiral movement. In addition, in other traditional zoom lenses, the focus group 18 and the second lens group 16 can also be screwed together through threads, instead of using the third curved groove 162 and the locking interface 181, as long as the focus group 18 It only needs to be able to move back and forth relative to the second lens group 16 .

The focusing lens module 1 after combining the fixing base 10 , the driving cam 12 , the first lens group 14 , the second lens group 16 and the focusing group 18 is shown in FIG. 1 b . At this time, the driving roller 15 locked at position a on the locking interface 141 of the first lens group 14 will be located at the position a1' of the first curved groove 121 of the transmission cam 12, and at the same time be located at the first straight line on the fixed seat 10. a2' position of trench 101 . The drive roller 17 locked at position b on the locking interface 161 of the second lens group 16 will be located at the b1' position of the second curved groove 122 of the transmission cam 12 , and at the same time be located at the second linear groove 102 on the fixing seat 10 The b2' position.

When the user toggles the zoom lever 123 to rotate the transmission cam 12 along the Y direction, the driving roller 15 locked at position a on the locking interface 141 of the first lens group 14 will be driven by the first curved groove of the transmission cam 12 . The a1' position of the groove 121 moves to the a1" position, and at the same time, the a2' position of the first linear groove 101 on the fixing seat 10 moves to the a2" position, whereby the first lens group 14 will be fixed along the X direction Seat 10 is close. On the other hand, the drive roller 17 locked at position b on the locking interface 161 of the second lens group 16 will move from the b1' position of the second curved groove 122 of the transmission cam 12 to the b1" position, and at the same time be moved by the fixed seat The b2' position of the second linear groove 102 on the 10 moves to the b2" position, so that the second lens group 16 approaches the fixing base 10 along the −X direction.

Using the above-mentioned traditional zoom lens module 1, the user can move the zoom lever 123 on the transmission cam 12 so that the first lens group 14 and the second lens group 16 can be positioned in the X direction (or -X direction) relative to the fixed seat 10. move. In this way, the two mirror chambers are simultaneously linked (that is, the distance between the lenses 143 and 163 is adjusted) to achieve the purpose of zooming.

However, because the zoom lever of the customer's optical machine is made behind the lens support surface, it is different from the design of the zoom lever of the traditional zoom lens before the lens support surface, so the above-mentioned traditional zoom lens is not suitable for this customer's optical machine. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a zoom lens in which the zoom lever is made behind the lens bearing surface and can also move more than two mirror chambers relatively simultaneously when the lens is zoomed. module.

The technical solution adopted by the present invention to solve the technical problem is to provide a zoom lens module, including a fixed seat, a body and at least one first curved groove, the first curved groove is arranged on the body; a transmission cam, Including at least a first linear groove; a first lens group, provided with a zoom rod; and a first driving roller, passing through the first linear groove of the transmission cam and the first curved groove of the fixing seat And locked to the first lens group, so that when the first lens group performs a helical movement relative to the fixed seat, the transmission cam will rotate in situ relative to the fixed seat.

In the zoom lens module according to the present invention, the fixing base further includes at least one second curved groove, the second curved groove is disposed on the body, and the extending direction of the second curved groove is different from that of the first curved groove. And the transmission cam further includes at least one second linear groove. The zoom lens module further includes a second lens group; and a second driving roller passing through the second linear groove of the transmission cam and the second curved groove of the fixing seat and locked to the second lens group, When the transmission cam is rotated relative to the fixed seat, the second lens group will perform a spiral movement relative to the fixed seat.

The zoom lens module according to the present invention further includes a focus group, the focus group is mounted on the second lens group in a manner that can move helically relative to the second lens group.

In the zoom lens module according to the present invention, the second lens group and the first lens group hold lenses respectively, so that the second lens group and the first lens group respectively form mirror chambers with the clamped lenses, The two mirror chambers can be moved relative to the fixed seat by turning the zoom lever.

In the zoom lens module according to the present invention, when facing the shooting direction of the zoom lens module, the components of the zoom lens module are arranged in order of the first lens group, the fixing seat, the driving cam, and the second lens group.

In the zoom lens module according to the present invention, the inner wall surface of the transmission cam has a protrusion, and the surface of the body of the fixing seat has an annular groove, and the protrusion is engaged in the groove, so that the transmission cam is The protrusion can only move along the groove and can only rotate in situ relative to the fixed seat.

In the zoom lens module according to the present invention, the driving cam further includes at least one annular groove, and the driving roller passes through the annular groove of the driving cam and is locked to the fixing seat, so that the driving cam is driven by the The driving roller can only move along the annular groove and can only rotate in situ relative to the fixed seat.

In the zoom lens module according to the present invention, the zoom lever is fixed to the first lens group in a locking manner.

In the zoom lens module according to the present invention, the zoom lever is directly formed on the first lens group.

In the zoom lens module according to the present invention, the fixing seat further has a supporting surface for fixing the zoom lens module to the peripheral device.

A zoom lens module according to the present invention is a projection lens module for a projection device.

As mentioned above, the present invention effectively designs a zoom lens module in which the zoom rod is made behind the lens bearing surface, and when the lens is zoomed, more than two mirror chambers can also be moved relative to each other at the same time. Furthermore, the use of the zoom lens module of the present invention also has the advantage of not affecting the production and assembly of the original lens.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, a specific preferred embodiment will be exemplified below and described in detail with the accompanying drawings.

Description of drawings

Figure 1a is an exploded perspective view of a conventional zoom lens module.

Fig. 1b is a three-dimensional combined view of a conventional zoom lens module.

Figure 1c is a cross-sectional view of a conventional zoom lens module.

Fig. 2a is an exploded perspective view of a zoom lens module according to the present invention.

Fig. 2b is a perspective combined view of the zoom lens module according to the present invention.

Fig. 2c is a cross-sectional view of a zoom lens module according to the present invention.

FIG. 3 is a perspective view of a driving cam and a fixing seat in a zoom lens module according to an embodiment of the present invention.

Detailed ways

Fig. 2a is an exploded perspective view of a zoom lens module according to the present invention. Fig. 2b is a perspective combined view of the zoom lens module according to the present invention. Fig. 2c is a cross-sectional view of a zoom lens module according to the present invention.

As shown in FIGS. 2 a - 2 c , the zoom lens module 2 includes a fixing seat 20 , a driving cam 22 , a first lens group 24 , a second lens group 26 , and a focusing group 28 . Also for the convenience of description, the direction of the central axis of the zoom lens module 2 is defined as the X direction, and the direction of rotation around the central axis is defined as the Y direction.

The fixing seat 20 is an annular wall, including a first curved groove 201 , a second curved groove 202 , and a supporting surface 203 . The first curved groove 201 and the second curved groove 202 both extend in the X direction and the Y direction at the same time, but as shown in Figure 2a, the first curved groove 201 and the second curved groove 202 have different extension directions respectively . The supporting surface 203 is used to fix the zoom lens module 2 to an external peripheral device.

The transmission cam 22 is also an annular wall, and a first linear groove 221 and a second linear groove 222 are formed on the wall thereof. The first linear groove 221 and the second linear groove 222 extend in the X direction, and the first linear groove 221 and the second linear groove 222 may have different extension lengths.

The first lens group 24 has a locking interface 241 and a zoom lever 242 . During assembly, the driving roller 25 can pass through the first linear groove 221 of the transmission cam 22 and the first curved groove 201 of the fixing seat 20 to be locked on the locking interface 241 . The zoom lever 242 is a rod-shaped structure, which can be fixed on the first lens group 24 by locking or directly making it on the first lens group 24. The user can move the zoom lever 242 to make the first lens group 24 Make a spiral movement relative to the fixed seat 20. The inside of the first lens group 24 further holds a lens 243 , and the lens 243 and the space inside the first lens group 24 form a mirror chamber.

The second lens group 26 has a locking interface 261 and a third curved groove 262. When assembling, the driving roller 27 can pass through the second linear groove 222 of the transmission cam 22 and the second curved groove 202 of the fixing seat 20 to be locked. on the locking interface 261 . The inside of the second lens group 26 further holds a lens 263 , and the lens 263 and the space inside the second lens group 26 form a mirror chamber.

The focusing group 28 has a locking interface 281, which can be locked on the locking interface 281 by driving the roller 27 through the third curved groove 262 of the second lens group 26, so that the focusing group 28 can be fixed relative to the second lens group 26. spiral movement. In addition, in other embodiments, the focusing group 28 and the second lens group 26 can also be screwed together, instead of using the third curved groove 262 and the locking interface 281, as long as the focusing group 28 can It only needs to move back and forth relative to the second lens group 26 .

The focusing lens module 2 after combining the fixing base 20 , the driving cam 22 , the first lens group 24 , the second lens group 26 and the focusing group 28 is shown in FIG. 2 b . At this time, the driving roller 25 locked at the position a on the locking interface 241 of the first lens group 24 will be located at the position a1' of the first linear groove 221 of the transmission cam 22, and at the same time be located at the first curve on the fixed seat 20. a2' position of the trench 201 . The driving roller 27 locked at position b on the locking interface 261 of the second lens group 26 will be located at the b1' position of the second linear groove 222 of the transmission cam 22, and at the same time be located at the first curved groove 201 on the fixing seat 20 The b2' position.

When the user toggles the zoom lever 242 to make the first lens group rotate in the -Y direction and move forward in the X direction (the first lens group 24 as a whole approaches the fixing seat 20), the first lens group 24 is locked to the first The driving roller 25 at the position a on the locking interface 241 of the lens group 24 will move from the position a1' of the first linear groove 221 of the transmission cam 22 to the position a1" and at the same time move from the first curved groove on the fixed seat 20 The a2' position of 201 moves to the a2" position. At this time, the movement of the driving roller 25 in the first curved groove 201 of the fixed seat 20 makes the driving cam 22 forced to rotate relative to the fixed seat 20 along the −Y direction. Because of the rotation of the transmission cam 22, the drive roller 27 locked at position b on the locking interface 261 of the second lens group 26 will move from the b1' position of the second linear groove 222 of the transmission cam 22 to the b1" position, and at the same time By moving from the b2' position of the second curved groove 202 on the fixing base 20 to the b2" position, the second lens group 26 will perform a spiral movement in a manner of rotating along the -Y direction and advancing towards the -X direction, so that The second lens group 26 approaches the fixing base 20 as a whole.

Using the zoom lens module 2 of the present invention, the user can move the zoom lever 242 on the first lens group 24 so that the first lens group 24 and the second lens group 26 can move in the X direction (or -X direction) relative to the fixed seat 20 ) to move up. In this way, the two mirror chambers are simultaneously linked (that is, the distance between the lenses 243 and 263 is adjusted) to achieve the purpose of zooming.

FIG. 3 is a perspective view of a driving cam and a fixing seat in a zoom lens module according to an embodiment of the present invention. To make the driving rollers 25, 27 slide smoothly in the first linear groove 221, the second linear groove 222 of the transmission cam 22 and the first curved groove 201, the second curved groove 202 of the fixing seat 20, The transmission cam 22 must only be able to rotate in situ relative to the fixed seat 20 along the Y direction (or -Y direction), but cannot move in the X direction (or -X direction). Therefore, the inner wall of the transmission cam 22 can have a protrusion 223 , and the outer wall of the fixing seat 20 can have an annular groove 204 extending along the Y direction. When assembling, make the protruding block 223 enter into the annular groove 204 through the notch 205 on the fixing base 20 , and rotate the transmission cam 22 to engage the protruding block 223 in the annular groove 204 . In this way, the transmission cam 22 can only rotate in situ relative to the fixed base 20 .

In addition to the above-mentioned design of the protrusion and the annular groove, at least one annular groove extending along the Y direction can also be provided on the transmission cam, and the locking interface can be processed at the corresponding position on the fixing seat body, so that after assembly The driving roller passes through the annular groove and is locked to the locking interface. Since the driving roller can only move along the Y direction, the effect that the driving cam can only rotate in situ relative to the fixed seat can also be achieved.

According to the above-mentioned embodiments, the present invention effectively designs a zoom lens module in which the zoom lever is made behind the lens bearing surface, and when the lens is zoomed, two or more mirror chambers can also be moved relative to each other at the same time. Furthermore, the use of the zoom lens module of the present invention also has the advantage of not affecting the production and assembly of the original lens.

The zoom lens module of the present invention is mainly used as a projector lens for a projection device, but the zoom lens module of the present invention can also be applied to lens modules in other fields. Therefore, although preferred embodiments have been described in detail, the above embodiments are merely examples of the present invention and not intended to be limiting thereto, and the actual scope of the present invention will be defined by the claims.

Claims (11)

1. A zoom lens module, characterized in that, comprising: The fixing seat includes a body and at least one first curved groove, and the first curved groove is arranged on the body; The transmission cam includes at least one first linear groove; The first lens group is provided with a zoom lever; and The first driving roller passes through the first linear groove of the transmission cam and the first curved groove of the fixing seat and is locked to the first lens group, so that the first lens group is relatively to the fixing seat When the screw moves, the transmission cam will rotate in situ relative to the fixed seat. 2. The zoom lens module according to claim 1, wherein the fixing seat further comprises at least one second curved groove, the second curved groove is arranged on the body, and the first curved groove is connected to the first curved groove. The grooves extend in different directions, and the transmission cam further includes at least one second linear groove, The zoom lens module further includes: second lens group; and The second driving roller passes through the second linear groove of the transmission cam and the second curved groove of the fixed seat and is locked to the second lens group, so that the transmission cam rotates in situ relative to the fixed seat , the second lens group will perform a spiral movement relative to the fixing base. 3 . The zoom lens module according to claim 2 , further comprising a focus group, the focus group is mounted on the second lens group in a manner that can move back and forth relative to the second lens group. 4 . 4. The zoom lens module according to claim 2, wherein the second lens group and the first lens group hold at least one lens respectively, so that the second lens group and the first lens group are respectively connected to the first lens group The clamped lens forms a mirror chamber, and the two mirror chambers can move relative to the fixed seat by moving the zoom lever. 5. The zoom lens module according to claim 2, wherein, when facing the shooting direction of the zoom lens module, the components of the zoom lens module are arranged in order of the first lens group, the fixing seat, the Transmission cam, the second lens group. 6. The zoom lens module according to claim 1 or 2, wherein the inner wall of the transmission cam has a protrusion, the surface of the body of the fixing base has an annular groove, and the protrusion is engaged with the concave In the groove, the transmission cam can only rotate in situ relative to the fixed seat because the projection can only move along the groove. 7. The zoom lens module according to claim 1 or 2, wherein the transmission cam further comprises at least one annular groove, and the driving roller passes through the annular groove of the transmission cam and is locked on the transmission cam. The fixed seat makes the transmission cam only rotate relative to the fixed seat in situ because the driving roller can only move along the annular groove. 8. The zoom lens module according to claim 1 or 2, wherein the zoom lever is fixed to the first lens group in a locking manner. 9. The zoom lens module according to claim 1 or 2, wherein the zoom lever is directly processed and formed on the first lens group. 10. The zoom lens module according to claim 1 or 2, wherein the fixing seat further has a bearing surface for fixing the zoom lens module to a peripheral device. 11. The zoom lens module according to claim 1 or 2, wherein the zoom lens module is used in a projection lens module of a projection device.

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