TWI420142B - Zoom lens module - Google Patents

Description

Zoom lens module

The present invention relates to a zoom lens module, and particularly relates to a zoom lens module after a zoom lever member is disposed on a lens bearing surface.

The zoom levers of the conventional zoom lens are designed before the lens bearing surface, and most of them provide zoom operation in the form of a pole. The user can toggle the zoom lever to rotate the transmission cam and drive the roller to make two More than one mirror room is linked to achieve the purpose of zooming.

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

As shown in FIGS. 1a-1c, the zoom lens module 1 includes a fixed base 10, a transmission cam 12, a first lens group 14, a second lens group 16, and a focus lens group 18. For convenience of explanation, the central axis direction of the zoom lens module 1 is defined as the X direction, and the direction of rotation about the central axis is defined as the Y direction.

The fixing base 10 is an annular wall body, and includes a first linear groove 101, a second linear groove 102, and a bearing 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 bearing surface 103 is a peripheral device (not shown) for fixing the zoom lens module 1 to the outside.

The transmission cam 12 is also an annular wall, and the wall surface is formed with a first curved groove 121, a second curved groove 122, and a zoom lever 123. First curve Both the trench 121 and the second curved trench 122 extend in the X direction and the Y direction at the same time. However, as shown in FIG. 1a, the first curved trench 121 and the second curved trench 122 have different extending directions. The zoom lever member 123 is a rod-like structure formed on the outer wall of the annular wall of the transmission cam 12, and the user can toggle the zoom lever member 123 to rotate the transmission cam 12 in the Y direction.

The first lens group 14 is provided with a locking interface 141 for locking a driving roller 15 through the first curved groove 121 of the transmission cam 12 and the first linear groove 101 of the fixing base 10 to the locking interface 141. A lens 143 is further sandwiched inside the first lens group 14, and the lens 143 forms a mirror chamber with the space inside the first lens group 14.

The second lens group 16 is provided with a locking interface 161 and a third curved groove 162. During assembly, a driving roller 17 can be locked through the second curved groove 122 of the transmission cam 12 and the second linear groove 102 of the fixing base 10. Attached to the lock interface 161. A lens 163 is further clamped inside the second lens group 16, and the lens 163 and the space inside the second lens group 16 form a mirror room.

The focusing lens group 18 has a locking interface 181, which can be attached to the locking interface 181 through a third curved groove 162 of the second lens group 16 through a driving roller, so that the focusing lens group 18 can be opposite to the second lens. Group 16 does a spiral movement. In addition, in other conventional zoom lenses, the focus lens group 18 and the second lens group 16 can also be screwed together, without necessarily using the third curved groove 162 and the locking interface 181, as long as the focus lens The group 18 can move back and forth with respect to the second lens group 16.

The focus lens module 1 in which the fixing base 10, the transmission cam 12, the first lens group 14, the second lens group 16, and the focus lens group 18 are combined will be like Figure 1b shows. At this time, the driving roller 15 locked to the position a of the locking interface 141 of the first lens group 14 is located at the a1' position of the first curved groove 121 of the transmission cam 12, while the first linear groove is located on the fixing base 10. 101 a2' position. The driving roller 17 locked to the position b of the locking interface 161 of the second lens group 16 is located at the position b1' of the second curved groove 122 of the transmission cam 12 while the second linear groove 102 is located on the fixing base 10. The b2' position.

When the user toggles the zoom lever member 123 to rotate the transmission cam 12 in the Y direction, the driving roller 15 locked to the position a of the locking interface 141 of the first lens group 14 is guided by the first curved groove of the transmission cam 12. The position a1' of the slot 121 moves toward the a1" position while moving from the a2' position of the first linear groove 101 on the fixed base 10 to the a2" position, whereby the first lens group 14 moves toward the fixed seat 10 along the X direction. near. On the other hand, the driving roller 17 locked to the position b of the locking interface 161 of the second lens group 16 is moved from the b1' position of the second curved groove 122 of the transmission cam 12 to the b1" position, and is fixed by the fixing seat. The position b2' of the second linear groove 102 on the 10 moves to the b2" position, whereby the second lens group 16 approaches the fixed seat 10 in the -X direction.

With the above-described conventional zoom lens module 1, the user dials the zoom lever member 123 on the transmission cam 12 to make the first lens group 14 and the second lens group 16 in the X direction (or -X direction) with respect to the fixed seat 10. Move on. Thereby, the two mirror chambers are connected at the same time (that is, the distance between the lenses 143 and 163 is adjusted) to achieve the purpose of zooming.

However, since the zoom lever of the customer's optical machine is made behind the lens bearing surface, it is different from the design of the zoom lever of the conventional zoom lens before the lens bearing surface. Therefore, an object of the present invention is to provide a zoom lens module in which a zoom lever member is formed behind a lens bearing surface, and two or more mirror chambers are simultaneously moved relative to each other when the lens is zoomed.

In view of the above problems, the present invention provides a zoom lens module including a fixing base including a body and a first curved groove, the first curved groove is disposed on the body, and a driving cam includes a first straight line a first lens group, a zoom lever member; and a first driving roller passing through the first linear groove of the driving cam and the first curved groove of the fixing seat and being locked to the first lens groove A lens group, when the first lens group is spirally moved relative to the fixed seat, the transmission cam rotates in situ relative to the fixed seat.

In the zoom lens module according to the present invention, the fixing base further includes a second curved groove, and the second curved groove is disposed on the body and does not coincide with the first curved groove. The transmission cam further includes a 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 driving cam and the second curved groove of the fixing seat and being locked to the second The lens group, when the transmission cam is rotated in situ relative to the fixed seat, the second lens group is helically moved relative to the fixed seat.

The zoom lens module according to the present invention further includes a focus lens group, and the focus lens group is mounted to the second lens group in a manner of being spirally movable 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 respectively hold a lens, so that the second lens group and the first lens group respectively form a lens with the held lens. The mirror chamber can move the two mirror chambers relative to the fixing seat by dialing the zoom lever.

In the zoom lens module according to the present invention, along the central axis of the zoom lens module, the components of the zoom lens module are sequentially from the projection end to the second lens group, the transmission cam, and the fixed seat. The first lens group.

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

In the zoom lens module according to the present invention, the first linear groove and the second linear groove extend in a central axis direction of the zoom lens module, and the transmission cam further includes an annular groove along the a central axis of the zoom lens module extends in a circumferential direction and does not coincide with the first linear groove and the second linear groove, wherein a third driven roller passes through the annular groove of the transmission cam and is locked thereto The fixing seat is such that the transmission cam can only rotate in the original position relative to the fixing seat because the third driving roller can only move along the annular groove.

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

In the zoom lens module according to the present invention, the fixing base further includes a bearing surface for fixing the zoom lens module to the peripheral device.

The zoom lens module according to the present invention is used for projection of a projection device Lens module.

As described above, the present invention effectively designs a zoom lens module in which a zoom lever member is formed behind a lens bearing surface, and when the lens is zoomed, two or more mirror chambers can simultaneously move relative to each other. 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 above and other objects, features and advantages of the present invention will become more apparent from

Fig. 2a is an exploded perspective view of the zoom lens module according to the present invention. Fig. 2b is a perspective assembled view of the zoom lens module according to the present invention. Figure 2c is a cross-sectional view of a zoom lens module in accordance with the present invention.

As shown in FIGS. 2a-2c, the zoom lens module 2 includes a mount 20, a drive cam 22, a first lens group 24, a second lens group 26, and a focus lens group 28. Also for convenience of explanation, the central axis direction of the zoom lens module 2 is defined as the X direction, and the direction of rotation about the central axis is defined as the Y direction.

The fixing base 20 is an annular wall body, and includes a first curved groove 201, a second curved groove 202, and a bearing surface 203. The first curved trench 201 and the second curved trench 202 both extend in the X direction and the Y direction at the same time, but as shown in FIG. 2a, the first curved trench 201 and the second curved trench 202 have different extensions respectively. direction. The bearing surface 203 is a peripheral device for fixing the zoom lens module 2 to the outside.

The transmission cam 22 is also an annular wall, and the wall surface is formed with a first straight a line groove 221 and a second straight groove 222. 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 is provided with a locking interface 241 and a zoom lever 242. During assembly, a driving roller 25 can be attached to the locking interface 241 through the first linear groove 221 of the transmission cam 22 and the first curved groove 201 of the fixing base 20. The zoom lever member 242 is a rod-shaped structure that can be fixed to the first lens group 24 by being locked or directly formed on the first lens group 24. The user can toggle the zoom lever member 242 to make the first lens. The group 24 is helically moved relative to the mount 20. A lens 243 is further sandwiched inside the first lens group 24, and the lens 243 forms a mirror chamber with the space inside the first lens group 24.

The second lens group 26 is provided with a locking interface 261 and a third curved groove 262. During assembly, a driving roller 27 can be locked through the second linear groove 222 of the transmission cam 22 and the second curved groove 202 of the fixing base 20. Attached to the lock interface 261. A lens 263 is further clamped inside the second lens group 26, and a space inside the lens group 263 and the second lens group 26 forms a mirror room.

The focusing lens group 28 has a locking interface 281, which is attached to the locking interface 281 through a third curved groove 262 of the second lens group 26, so that the focusing lens group 28 can be opposite to the second lens. Group 26 does a spiral movement. In addition, in other embodiments, the focus lens 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 focus lens group 28 can be moved back and forth with respect to the second lens group 26.

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

When the user toggles the zoom lever member 242 to make the first lens group rotate in the -Y direction and advance in the X direction (the first lens group 24 as a whole approaches the fixed seat 20), the first lens group is locked to the first The driving roller 25 at the position a of the locking interface 241 of the lens group 24 is moved by the a1' position of the first linear groove 221 of the transmission cam 22 to the a1" position while being the first curved groove 201 on the fixing base 20. The a2' position moves to the a2" position. At this time, the movement of the drum 25 in the first curved groove 201 of the fixed seat 20 is caused, so that the transmission cam 22 is forced to rotate relative to the fixed seat 20 in the -Y direction. Because of the rotation of the transmission cam 22, the driving roller 27 locked to the position b of the locking interface 261 of the second lens group 26 is moved by the b1' position of the second linear groove 222 of the transmission cam 22 to the b1" position, while Moving from the position b2' of the second curved groove 202 on the fixing base 20 to the position b2", whereby the second lens group 26 is spirally moved in the -Y direction and advancing in the -X direction. The second lens group 26 as a whole approaches the fixed base 20.

With the zoom lens module 2 of the present invention, the user can zoom the zoom lever member 242 on the first lens group 24 to enable the first lens group 24 and the second lens group 26 It moves in the X direction (or -X direction) with respect to the fixed seat 20. Thereby, the two mirror chambers (that is, the distances of the adjustment lenses 243 and 263) are linked at the same time to achieve the purpose of zooming.

3 is a perspective view of a transmission cam and a mount in a zoom lens module according to an embodiment of the present invention. To drive the rollers 25, 27 to smoothly slide in the first linear groove 221, the second linear groove 222 of the transmission cam 22, and the first curved groove 201 and the second curved groove 202 of the fixed seat 20, the driving cam 22 must be able to rotate only in the Y direction (or -Y direction) relative to the fixed seat 20, but not in the X direction (or -X direction). Therefore, the inner wall surface of the transmission cam 22 may have a projection 223, and the outer wall surface of the fixing base 20 has an annular groove 204 extending in the Y direction. During assembly, the bump 223 is inserted into the annular groove 204 through a notch 205 in the fixing base 20, and the transmission cam 22 is rotated to engage the projection 223 in the annular groove 204. As a result, the transmission cam 22 can only rotate in place relative to the fixed seat 20.

In addition to the above-mentioned design of the bump and the annular groove, at least one annular groove extending in the Y direction may be disposed on the transmission cam, but not the first straight groove and the first extending along the X direction. The two linear grooves are coincident, and a locking interface is processed at a corresponding position on the fixing body, so that the assembled roller is attached to the locking interface through the annular groove after assembly. Since the driving roller can only move in the Y direction, the effect that the transmission cam can only rotate in place with respect to the fixed seat can be achieved.

According to the above embodiment, the present invention effectively designs a zoom lever member to be fabricated behind the lens bearing surface, and the lens can also be rotated more than two times. The mirror chamber simultaneously moves the zoom lens module. 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. Having thus described the preferred embodiments, the above embodiments are merely illustrative of the invention, and the scope of the invention is defined by the scope of the claims.

1, 2‧‧‧ zoom lens module

10, 20‧‧‧ fixed seat

12, 22‧‧‧ drive cam

14, 24‧‧‧ first lens group

15, 17, 25, 27‧‧‧ drive the drum

16, 26‧‧‧ second lens group

18, 28‧‧‧ Focus lens group

101, 221‧‧‧ first straight groove

102, 222‧‧‧ second linear groove

103, 203‧‧‧ bearing surface

121, 201‧‧‧ first curved groove

122, 202‧‧‧second curved groove

162, 262‧‧‧ third curved groove

123, 242‧‧‧ Zoom lever

141, 191, 181, 241, 261, 281 ‧ ‧ lock interface

143, 163, 243, 263 ‧ ‧ lenses

204‧‧‧ annular groove

205‧‧‧ gap

223‧‧‧Bumps

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

Figure 1b is a three-dimensional combination 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 the zoom lens module according to the present invention.

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

Figure 2c is a cross-sectional view of a zoom lens module in accordance with the present invention.

3 is a perspective view of a transmission cam and a mount in a zoom lens module according to an embodiment of the present invention.

2‧‧‧Zoom lens module

20‧‧‧ Fixed seat

22‧‧‧Drive cam

24‧‧‧First lens group

26‧‧‧second lens group

28‧‧‧Focus lens group

221‧‧‧First straight groove

222‧‧‧Second straight groove

203‧‧‧ bearing surface

201‧‧‧ first curved groove

202‧‧‧second curved groove

262‧‧‧ Third Curve Trench

242‧‧‧Zoom rod

241, 261, 281‧‧‧ lock interface

Claims (10)

A zoom lens module includes: a fixing base comprising a body and a first curved groove, wherein the first curved groove is disposed on the body; a driving cam includes a first linear groove; and a first lens a first zoom roller, and a first linear roller that passes through the first linear groove of the transmission cam and the first curved groove of the fixed seat and is locked to the first lens group, so that the first When a lens group is helically moved relative to the fixed seat, the transmission cam rotates in situ relative to the fixed seat. The zoom lens module of claim 1, wherein the fixing base further comprises a second curved groove, the second curved groove is disposed on the body and does not coincide with the first curved groove. The zoom cam further includes a second linear groove, the zoom lens module further includes: a second lens group; and a second driving roller, the second linear groove passing through the driving cam and the fixing The second curved groove of the seat is locked to the second lens group such that when the transmission cam rotates in situ relative to the fixed seat, the second lens group is spirally moved relative to the fixed seat. The zoom lens module of claim 2, further comprising a focus lens group, wherein the focus lens group is mounted to the second lens group in such a manner as to be movable back and forth with respect to the second lens group. The zoom lens module of claim 2, wherein The second lens group and the first lens group respectively hold at least one lens, so that the second lens group and the first lens group respectively form a mirror chamber with the lens that is clamped, by dialing the zoom lever The member can move the two mirror chambers relative to the mount. The zoom lens module of claim 2, wherein, along a central axis of the zoom lens module, each component of the zoom lens module is sequentially the second lens group from the projection end, and the transmission a cam, the fixing seat, and the first lens group. The zoom lens module of claim 1 or 2, wherein the inner wall of the transmission cam has a protrusion, the body surface of the fixing seat has an annular groove, and the protrusion is engaged. Into the annular groove, the transmission cam can only rotate in situ relative to the fixed seat because the projection can only move along the annular groove. The zoom lens module of claim 2, wherein the first linear groove and the second linear groove extend in a central axis direction of the zoom lens module, and the transmission cam further includes an annular groove a slot extending along a circumferential direction of the central axis of the zoom lens module and not coincident with the first linear groove and the second linear groove, wherein a third driven roller passes through the annular groove of the transmission cam And being locked to the fixing seat, so that the transmission cam can only rotate in the original position relative to the fixing seat because the third driving roller can only move along the annular groove. The zoom lens module of claim 1 or 2, wherein the zoom lever member is fixed to the first lens group in a locking manner. The zoom lens module as described in claim 1 or 2 The set, wherein the fixing base further has a bearing surface, and the zoom lens module is fixed to the peripheral device. The zoom lens module according to claim 1 or 2, wherein the zoom lens module is used for a projection lens module of a projection device.