TWI387795B - The transmission of optical equipment - Google Patents

Description

Optical device transmission

The present invention relates to an optical device, and more particularly to a transmission for an optical device.

In general optical equipment for optical magnification adjustment or focusing, the transmission is used to drive the mirror group to move to the appropriate position to obtain the desired magnification or focal length.

Referring to FIGS. 1~3, there is a prior art optical device transmission device 2, comprising a base 21, a screw 22 pivotally pivoted to the base 21 along an axial direction Y, and a drive unit for driving the rotation of the screw 22. a guide rod 24 disposed on the base 21 parallel to the screw 22, a bracket 25 disposed on the base 21 and connected to the guide rod 24, a frame 26, and an adjustable screw a nut 27 disposed on the screw 22 and abutting against the frame 26, and a spring 28 interposed between the frame 26 and the base 21 and constantly pushing the frame 26 away from the base 21, wherein the bracket 25 includes a guide groove 251 facing the screw 22. The frame 26 includes a guiding portion 261 which is slidably sleeved on the guiding rod 24 to restrict the rotation direction of the frame 26, and a driving portion 262 which is disposed on the screw 22 and abuts against the nut 27. The nut 27 includes a body 271, and a guiding block 272 extending outward from the body 271 and engaging with the guiding groove 251. Thus, the body 271 can be defined only when the screw 22 rotates. The optical axis Y1 parallel to the axial direction Y moves linearly.

When the frame 26 is to be brought close to the base 21, the screw 22 is driven to rotate about its own axis by the driving unit 23, so that the nut 27 is along The axial direction Y moves toward the base 21 to push the driving portion 262 of the frame 26, so that the frame 26 can be moved downward and the spring 28 can be simultaneously compressed. Conversely, when the frame 26 is to be moved away from the base 21, the screw 22 only needs to be rotated in the reverse direction, and the nut 27 will be away from the base 21 along the axial direction Y. At this time, the spring 28 will push the The driving portion 262 of the frame 26 moves the frame 26 away from the base 21.

Although the frame 26 can be moved by the driving unit 23 to achieve the purpose of magnification adjustment or focusing, the transmission device 2 has the following disadvantages:

1. Noise is easily generated: the nut 27 is in surface contact with the screw 22 when the screw 22 rotates, so that the two are easy to generate noise due to friction during the movement.

Second, the assembly is not easy: in order to prevent the nut 27 from rotating or swaying around the axial direction Y during the movement, the guide block 272 and the guiding groove 251 need to be fitted quite accurately, but the nut 27 is It is necessary to accurately align the guide block 272 with the guiding groove 251 during assembly to be smoothly embedded, which makes the assembly process relatively difficult.

Accordingly, it is an object of the present invention to provide a transmission for an optical device that reduces noise, is easy to assemble, and reduces manufacturing costs.

Therefore, the transmission device of the optical device of the present invention comprises a base, a screw, a driving unit, a guiding member, a frame body, and a clamping member, wherein the screw is pivotally disposed along the axial direction Pedestal. The drive unit is for driving the screw to rotate. The guiding member is parallel to the screw disposed on the base. The frame includes a guide that cooperates with the guide member to limit the direction of rotation of the frame Leading section. The clamping member is placed on the frame and elastically deformable, and includes a pair of clamping arms that cooperate to tightly clamp the screw.

Since the clamping arms of the clamping member are in point contact with the screw when the screw rotates, the noise generated by the friction of the screw rotation can be reduced, and the clamping arms can be assembled without accurate alignment. Holding the screw makes the transmission easier to assemble.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 4 to FIG. 6 , a first preferred embodiment of the transmission device 1 of the optical device of the present invention comprises a base 11 , a screw 12 , a driving unit 13 , a guiding member 14 , and a frame 15 . And a clamping member 16.

The base 11 includes a bracket 111 connected to the screw 12 and the guide member 14.

The screw 12 is rotatably pivoted to the base 11 along an axial direction L.

The driving unit 13 includes a motor 131 for driving the rotation of the screw 12, and a reduction gear train 132 connecting the motor 131 and the screw 12.

The guiding member 14 is a guiding rod inserted into the base 11 parallel to the screw 12 .

The frame body 15 includes a guiding portion 151, a driving portion 152 disposed on the screw 12, a positioning post 153 formed on the driving portion 152, and a The carrying portion 154 of the optical element is mounted, wherein the guiding portion 151 is slidably sleeved on the guiding member 14 to limit the rotating direction of the frame 15. The driving portion 152 has two slits 150 which are located at different heights along the axial direction L. The optical component carried by the carrying portion 154 may be a lens or an optical coupling component. In this embodiment, the optical component carried by the carrying portion 154 is a lens. The lens and the bearing portion 154 are positioned on an optical axis L1 parallel to the axial direction L.

Referring to FIGS. 5-7, the clamping member 16 is a torsion spring disposed on the frame 15, and includes a set of helical segments 161 elastically deformable on the positioning post 153 of the frame 15, and a pair of The spiral section 161 is connected to the clamp arm 162. When the clamping member 16 is assembled, the clamping arm 162 that moves away from the frame 15 is first rotated in the direction indicated by the arrow in FIG. 7, so that the spiral segment 161 is tightened to generate a pre-force, and then the clamp is clamped. The arms 162 are respectively embedded in the slits 150 and the spiral segments 161 are sleeved on the positioning posts 153. Thus, the clamping arms 162 can be tightly clamped by the pre-force of the spiral segments 161. Screw 12. It should be noted that the clamping member 16 can also be a leaf spring.

Referring to FIGS. 4 and 5, when the frame 15 is to be moved toward the base 11, the motor 131 of the driving unit 13 drives the screw 12 to rotate in its own axis via the reduction gear train 132, and the screw is rotated by its screw. The 12-screw pushes the clamp arms 162 of the clamp member 16, such that the clamp arms 162 abut against the drive portion 152 of the frame 15 to move the frame 15 toward the base 11. Conversely, when the frame 15 is to be moved away from the base 11, the motor 131 only needs to be controlled to reverse the screw 12. At this time, the screw of the screw 12 is pushed. The clamping arms 162 are pushed against the driving portion 152 to further move the frame 15 away from the base 11.

Through the above description, the advantages of the present invention can be summarized as follows:

1. The noise can be reduced: since the clamping arms 162 of the clamping member 16 are in point contact with the screw 12 when the screw 12 rotates, the nut 27 is in surface contact with the screw 22. In this case, the friction area during rotation can be greatly reduced, thereby reducing noise.

Second, it is easy to assemble: the clamping arms 162 need only be respectively inserted into the slits 150 to clamp the screw 12, and it is not necessary to accurately assemble the guiding block 272 when assembling the nut 27 as is conventional. The guide groove 251 can be smoothly inserted, so that the transmission device 1 can be assembled more easily.

3. The manufacturing cost can be reduced: by the arrangement of the clamping member 16 and the slit 150, the screw 12 can move the frame 15 along the axial direction L, which is required to be provided. 251. The nut 27 and the spring 28 enable the screw 22 to drive the frame 26, thereby reducing the manufacturing cost of the transmission device 1.

It should be noted that the guiding member 14 can also be a guiding slot, and the guiding portion 151 of the frame body 15 is a protrusion that cooperates with the guiding member 14, so that the frame body 15 can also be restricted. turn around.

Referring to FIG. 8, a second preferred embodiment of the present invention is different from the first preferred embodiment in that it further includes an elastic member 17, which is a compression spring and is sandwiched between the frame. The driving portion 152 of the body 15 and the susceptor 11 are constantly pushed away from the susceptor 11 so that, in addition to the same effects as the first preferred embodiment, the absorbing portion can absorb the same The backlash between the clamp arm 162 and the screw of the screw 12, and the lifting of the frame 15 when it is raised.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1‧‧‧Transmission

11‧‧‧Base

111‧‧‧ bracket

12‧‧‧ screw

13‧‧‧Drive unit

131‧‧‧Motor

132‧‧‧Reduction gear train

14‧‧‧ Guides

15‧‧‧ frame

150‧‧‧ incision

151‧‧‧Guidance

152‧‧‧ Drive Department

153‧‧‧Positioning column

154‧‧‧Loading Department

16‧‧‧Clamping parts

161‧‧‧Spiral section

162‧‧‧ clip arm

17‧‧‧Flexible parts

L‧‧‧ axial

L1‧‧‧ optical axis

1 is a perspective view showing a conventional optical device transmission device; FIG. 2 is a cross-sectional view showing a connection relationship between a screw and a frame; and FIG. 3 is a cross-sectional view showing a guide block engaged with a guide groove. FIG. 4 is a perspective view showing a first preferred embodiment of a transmission device for an optical device according to the present invention; FIG. 5 is a cross-sectional view showing a case where a driving portion is sleeved on a screw; FIG. The cross-sectional view illustrates a case where a clamping member holds a screw; FIG. 7 is a schematic view showing a situation in which one of the clamping arms of the clamping member rotates in one direction to tighten a spiral segment; and FIG. 8 A cross-sectional view illustrating a second preferred embodiment of the present invention.

1‧‧‧Transmission

11‧‧‧Base

111‧‧‧ bracket

12‧‧‧ screw

13‧‧‧Drive unit

131‧‧‧Motor

132‧‧‧Reduction gear train

14‧‧‧ Guides

15‧‧‧ frame

150‧‧‧ incision

151‧‧‧Guidance

152‧‧‧ Drive Department

162‧‧‧ clip arm

L‧‧‧ axial

Claims (9)

A transmission device for an optical device, comprising: a base; a screw pivotally pivoted on the base in an axial direction; a drive unit for driving the screw to rotate; a guide member, Is disposed parallel to the screw to the base; a frame body includes a guiding portion that cooperates with the guiding member to limit the rotating direction of the frame body, and a positioning post; and a clamping member is disposed The frame body is elastically deformable and includes a set of elastically deformable spiral segments disposed on the positioning post, and a pair of clamping arms that closely fit the screw, and the pair of clamping arms are coupled to the spiral segment. The transmission device of the optical device according to claim 1, wherein the frame further comprises a driving portion provided on the screw and having two slits, wherein the clamping arms of the clamping members are respectively embedded In the incisions. The transmission of the optical device of claim 2, wherein the slits are located at different heights along the axial direction. A transmission device for an optical device according to claim 1, wherein the clamping member is a torsion spring. The transmission device of the optical device according to claim 1, wherein the guiding member is a guiding rod inserted in the base, and the guiding portion of the frame is slidably sleeved on the guiding member Guide. The transmission device of the optical device according to claim 1, wherein the driving unit comprises a motor for driving the screw to rotate, and a reduction gear train connecting the motor and the screw. The transmission device of the optical device according to claim 2, further comprising an elastic member interposed between the driving portion and the base and constantly pushing the driving portion away from the base. A transmission device for an optical device according to claim 7, wherein the elastic member is a compression spring. The transmission device of the optical device according to claim 1, wherein the frame further comprises a bearing portion for carrying the optical component.