TW201428377A - Zooming and focusing mechanism - Google Patents

Abstract

This invention discloses a zooming and focusing mechanism. The zooming and focusing mechanism comprises a driving module, a first zooming mirror-holder, a second zooming mirror-holder, a first focusing mirror-holder and a second focusing mirror-holder. The driving module is disposed in a housing, comprising a driving-shaft having a thread-part and a zooming-and-focusing unit. The zooming-and-focusing unit is disposed on the thread-part, having a bearing surface and a focusing-part. The two focusing mirror-holders are respectively disposed on two sides of the driving module. The first zooming mirror-holder is disposed on the zooming-and-focusing unit. The second zooming mirror-holder is disposed on the first zooming mirror-holder. The two focusing mirror-holders are respectively disposed on two sides of the driving module. A guiding-part of the first focusing mirror-holder is disposed on the focusing-part. The second focusing mirror-holder is disposed on the first focusing mirror-holder. The invention can thereby reduce volume and cost of the product.

Description

Zoom and focus mechanism

The present invention relates to a zoom and focus mechanism, and more particularly to a zoom and focus mechanism that utilizes a driving unit to synchronously drive two zoom lens groups and two focus lens groups for zooming and focusing.

Most of the current image capturing devices, such as cameras or cameras, only have a single lens, and can only capture images in a two-dimensional plane. Although there are many methods for reconstructing a two-dimensional planar image into a three-dimensional stereoscopic image through image processing, the stereoscopic image formed by image processing has a poor stereoscopic quality. Therefore, users mostly expect to obtain a stereoscopic image of a person with a good stereoscopic vision and a landscape by means of a parallax method by means of a two-lens.

A part of the camera using two mirrors has a zooming and focusing function, and in zooming and focusing, at least two driving units are respectively disposed in each of the mirror groups to respectively drive the lens group for zooming or focusing. However, in the whole of the camera, two or more driving units are used, which greatly occupy most of the design space of the camera, so that the product is not easy to be miniaturized and thinned, and the product is increasingly miniaturized and thinned. Today, it is really unfavorable. On the other hand, the cost of the drive unit (motor) is mostly the highest of the lens module or camera, so the number of drive units affects the cost of the product.

In another part, a camera using two mirrors is designed to save the number of driving units, and is designed as a fixed focal length second mirror group, thereby achieving the purpose of miniaturization, thinning, or cost reduction. However, this method causes the user to use a fixed focal length camera, often due to the change or selection of the composition, but needs to move the step or the telescopic hand to adjust the range of the angle of view to achieve the composition change, which is for the user. It is really a big problem.

In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a zooming and focusing mechanism to solve the problems of the prior art that it is difficult to miniaturize, reduce the thickness, or the material cost is too high.

In accordance with the purpose of the present invention, a zoom and focus mechanism is provided that includes a housing having an accommodation space. Two first mirror groups are disposed on the sidewall of the housing. A driving module is disposed in the accommodating space and is located between the two first mirror groups, and includes a driving shaft and a zooming and focusing member. The shaft of the drive shaft has a threaded portion. The zooming and focusing member is disposed on the threaded portion, which is a cylindrical structure; one end of the zooming and focusing member is a bearing surface, and a focusing portion is disposed on the cylinder; the two ends of the focusing portion have a top abutting surface. a first zoom frame is disposed on one side of the driving module, and has a second mirror group; the second mirror group is located on a first optical axis of one of the first mirror groups; the first zoom frame is zoomed and The focusing member extends out of a first bearing portion and bears against the bearing surface. a second zoom frame is disposed on the other side of the driving module and has a second mirror group; the second mirror group is located on a second optical axis of one of the other first mirror groups; the second zoom frame is oriented The first bearing portion extends out of a second bearing portion and bears against the first bearing portion. a first focusing frame is disposed on the side of the driving module, and has a third mirror group on the first optical axis; the first focusing frame extends a guiding portion toward the focusing portion, and the guiding portion is located in the focusing portion on. a second focusing frame is disposed on the other side of the driving module, and has a third mirror group on the second optical axis; the second focusing frame extends a third bearing to the first focusing frame And the first focus frame. When the driving shaft rotates, the first zoom frame and the second zoom frame or the first focus frame and the second focus frame are axially displaced by the zoom and the axial displacement or rotation of the focusing member to perform zooming Or focus.

Preferably, the first adjusting component is movably disposed on the first receiving portion of the first zoom frame to abut the second receiving portion of the second zoom frame. The relative position of the first zoom frame and the second zoom frame is adjusted by adjusting the length of the first adjusting element protruding from the first zoom frame.

Preferably, a second adjusting component is further disposed on the first focusing frame to abut against the third receiving portion of the second focusing frame. The relative position of the first focus frame and the second focus frame is adjusted by adjusting the length of the second adjustment element extending from the first focus frame.

As described above, the zoom and focus mechanism according to the present invention may have one or more of the following advantages:
(1) The zoom and focus mechanism can drive the drive shaft by a driving unit to axially displace the two zoom frames and the two focus frames to achieve zooming and focusing, thereby reducing the use of the driving unit. Quantity, which in turn reduces production costs.
(2) The zoom and focus mechanism uses a driving unit and a drive shaft to zoom or focus the two zoom frames and the two focus frames, thereby reducing the size of the lens and thereby making the camera thin. And the purpose of lightweighting.
(3) The zooming and focusing mechanism adjusts the relative position between the two zoom frames by the first adjusting component and adjusts the relative position between the two focusing frames by the second adjusting component, thereby reducing two The problem of inconsistent focus or focus caused by production tolerances or assembly tolerances of the frame structure.

1. . . Zoom and focus mechanism

10. . . case

101. . . First mirror group

11. . . Drive module

111. . . Drive shaft

1111. . . Thread part

1112. . . Drive department

112. . . Zoom and focus

1121. . . Bearing surface

1122. . . Focus section

1123. . . Top surface

113. . . Drive unit

12. . . First zoom frame

121, 131. . . Second mirror group

122. . . First abutment

123. . . First through hole

13. . . Second zoom frame

132. . . Second abutment

133. . . First through hole

14. . . First focus frame

141, 151. . . Third mirror group

142. . . Guide

143, 153. . . Second through hole

15. . . Second focus frame

152. . . Third Attendance Department

16. . . Guide rod

17. . . First elastic member

18. . . Second elastic member

19. . . First adjustment component

20. . . Second adjustment component

3. . . Photography device

31. . . Button

32. . . Control module

33. . . Reflector

34. . . Photosensitive element

Figure 1 is a first schematic view of one embodiment of a zoom and focus mechanism of the present invention.
Figure 2 is a second schematic view of one embodiment of the zoom and focus mechanism of the present invention.
Figure 3 is a third schematic view of one embodiment of the zoom and focus mechanism of the present invention.
Figure 4 is a first schematic view of another embodiment of the zoom and focus mechanism of the present invention.
Figure 5 is a second schematic view of another embodiment of the zoom and focus mechanism of the present invention.
Figure 6 is a third schematic view of another embodiment of the zoom and focus mechanism of the present invention.

The zoom and focus mechanism of the present invention can be applied to a three-dimensional imaging camera such as a periscope lens group, a digital camera or a smart camera phone for stereoscopic imaging, but the scope of practical use is not limited thereto.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which are respectively a first schematic diagram, a second schematic diagram and a third schematic diagram of an embodiment of the zoom and focus mechanism of the present invention. The zoom and focus mechanism 1 of the present invention comprises a housing 10, a driving module 11, a first zoom frame 12, a second zoom frame 13, a first focusing frame 14 and a second focusing mirror. Rack 15. The housing 10 has an accommodation space. Two first mirror groups 101 are disposed on one side wall of the housing 10. The driving module 11 is disposed in the accommodating space and is located between the two first mirror groups 101 and includes a driving shaft 111 and a zooming and focusing member 112. The shaft of the drive shaft 111 has a threaded portion 1111, and the two ends of the drive shaft 111 are movably fixed to the housing 10, respectively. The zooming and focusing member 112 is disposed on the threaded portion 1111; the zooming and focusing member 112 is a cylindrical structure, one end of the zooming and focusing member 112 is a bearing surface 1121, and a focusing portion 1122 is disposed on the cylinder; the focusing portion 1122 is The two ends respectively have a top abutting surface 1123.

The first zoom frame 12 is disposed on one side of the driving module 11 and has a second mirror group 121; the second mirror group 121 is located on a first optical axis of one of the first mirror groups 101; the first zoom lens The frame 12 extends from the zoom and focus member 112 to a first abutting portion 122 and bears against the bearing surface 1121. The second zoom frame 13 is disposed on the other side of the driving module 11 and has the second mirror group 131; the second mirror group 131 is located on the second optical axis of one of the other first mirror groups 101; The zoom frame 13 extends from the first abutting portion 122 to a second abutting portion 132 and bears against the first abutting portion 122 . The first focusing frame 14 is disposed on the side of the driving module 11 and has a third mirror group 141 on the first optical axis. The first focusing frame 14 extends a guiding portion 142 toward the focusing portion 1122. The guiding portion 142 is located on the focusing portion 1122. The second focusing frame 15 is disposed on the other side of the driving module 11 and has the third mirror group 151 on the second optical axis; the second focusing frame 15 extends to the first focusing frame 14 The three receiving portions 152 are supported by the first focusing frame 14 .

When the drive shaft 111 rotates, the zoom and focus member 112 produces an axial displacement or rotation on the drive shaft 111. When the zoom and focus member 112 generates an axial displacement, the first zoom frame 12 and the second zoom frame 13 are axially displaced along the drive shaft 111 to perform a zooming action. When the zoom and focus member 112 rotates, the first focus frame 14 and the second focus frame 15 are axially displaced along the drive shaft 111 to perform a focusing operation.

Specifically, when the drive shaft 111 rotates, it will first drive the zoom and focus member 112 to rotate, and the zoom and focus member 112 rotates to the focus portion of the first focus frame 14 and the zoom and focus member 112. When one of the top abutting faces 1123 of 1122 touches, the zooming and focusing member 112 is converted from a rotational displacement to an axial displacement. At this time, the first zoom frame 12 and the second zoom frame 13 synchronously generate axial displacement along the drive shaft 111 by the axial displacement of the zoom and focus members 112, so that the second second mirror group 121, The relative positions of the 131 and the first mirror group 101 are changed (the first mirror group 101 and the second mirror groups 121 and 131 are referred to as zoom lens groups), and the zoom operation is performed. When the second second mirror groups 121, 131 are respectively zoomed in the proper relative positions with the first mirror group 101, the drive shaft 111 is then reversely rotated. At this time, the guiding portion 142 does not touch the abutting surface 1123, and the zooming and focusing member 112 is converted into a rotational displacement by the axial displacement. When the zooming and focusing member 112 is rotationally displaced, the guiding portion 142 of the first focusing frame 14 is pulled by the inclined surface or the curved surface of the focusing portion 1122 to generate an axial displacement along the driving shaft 111, and is coupled to make the second focusing. The frame 15 synchronously produces an axial displacement. At this time, the relative positions of the second third mirror groups 141, 151 and the zoom lens group are changed, and when the position is changed to an appropriate relative position, the focusing operation is completed.

Please refer to FIG. 4 and FIG. 5 , which are respectively a first schematic diagram and a second schematic diagram of another embodiment of the zoom and focus mechanism of the present invention. In the present embodiment, the zooming and focusing mechanism 1 is applied to the imaging device 3 having a stereoscopic image of a periscope lens, but is not limited thereto. As shown, the camera device 3 includes a plurality of buttons 31, a control module 32, two mirrors 33, and two photosensitive elements 34. The rest further includes a storage unit, a display unit, and a flash module as are well known to those skilled in the art. Groups, etc., will not be described here.

The driving module 11 further includes a driving unit 113, which can be a stepping or servo motor, and is electrically connected to the control module 32. The drive shaft 111 has a driving portion 1112 adjacent to one end of the first mirror group 101, which meshes with the driving unit 113, so that the driving unit 113 can drive the driving shaft 111 to rotate. Incidentally, the number of teeth of the drive unit 113 can correspond to the number of teeth of the drive portion 1112 to properly drive the drive shaft 111 to rotate, which is well known to those skilled in the art.

On the other hand, the first through holes 123 and 133 are respectively disposed on the first zoom frame 12 and the second zoom frame 13 , and the first focus frame 14 and the second focus frame 15 are respectively disposed Second through holes 143, 153. The guiding rod 16 passes through the first through hole 123 of the first zoom frame 12 and the second through hole 143 of the first focusing frame 14 , and the guiding rod 16 is parallel to the driving shaft 111 , and the guiding rod 16 is utilized. Guided, the first zoom frame 12 and the first focus frame 14 are stably axially displaced along the guiding rod 16 or the driving shaft 111. Similarly, the first through hole 133 of the second zoom frame 13 and the second through hole 153 of the second focus frame 15 also have a guiding rod 16 passing therethrough. Preferably, at least one first elastic member 17 is sleeved on the guiding rod 16. In terms of the first zoom frame, the first elastic member 17 is located between the first zoom frame 12 and the housing 10 adjacent to the other side wall of the first focus frame 14. In terms of the second zoom frame, the first elastic member 17 is located between the second zoom frame 13 and the housing 10 adjacent to the other side wall of the first focus frame 14. At this time, the length of the first elastic member 17 not axially stretched and contracted is greater than the maximum distance between the first zoom frame 12 and the other side wall and the maximum distance between the second zoom frame 13 and the other side wall to utilize the first elasticity. The elastic restoring force of the member 17 is such that the first zoom frame 12 and the second zoom frame 13 are abutted, so that the first zoom frame 12 can be axially displaced more stably, and the second zoom frame 13 can be stabilized. Abutting against the first zoom frame 12, axial displacement is performed in synchronization with the first zoom frame 12. It should be noted that the second elastic member 18 can be similarly disposed on the rod between the first focus frame 14 and the housing 10 adjacent to the sidewall of the first zoom frame 12, and the second focus frame 15 and The housing 10 is adjacent to the body between the side walls of the first zoom frame 12 to stably operate the first focus frame 14 and the second focus frame 15 by the same principle.

When the user presses the button 31 (such as the zoom button), the control module 32 generates a control signal, so that the driving unit 113 rotates in one direction to drive the driving shaft 111 to rotate, and the first zoom frame 12 and the second zoom are linked. The frame 13 is displaced to have an appropriate relative position with the first mirror group 101 (such as the first-stage zoom). At this time, the user presses the button 31 (such as a shutter button) for half-pressing, so that the control module 32 generates another control signal. The driving unit 113 is rotated in the reverse direction to drive the driving shaft 111 to rotate in the reverse direction, and the first focusing frame 14 and the second focusing frame 15 are interlocked to have an appropriate relative position with the zoom lens group. At this time, the optical signals of the subject are respectively refracted by the two mirrors 33, and are respectively imaged on the two photosensitive elements 34 along the first optical axis and the second optical axis, respectively. The two photosensitive elements 34 respectively convert the optical signals of the objects they receive into the first image signal and the second image signal, and then the first image signal and the first image signal through an image synthesis module (not shown). The two image signals are reconstructed into a three-dimensional image for display on a display screen (not shown) or a storage unit (not shown).

Please refer to FIG. 6, which is a third schematic diagram of another embodiment of the zoom and focus mechanism of the present invention. As shown in the figure, after the assembly of the camera device 3 is completed, a calibration procedure is often performed. When the camera device 3 is found to be unable to establish a correct three-dimensional image, the reason is mostly due to the production tolerance of the component or the error during assembly. For example, the two zoom frames 12, 13 have different relative positions from the first mirror group 101, or the two focus frames 14, 15 are opposite to the zoom lens group (the first mirror group 101 and the second mirror group 121, 131). The location is different. At this time, a first adjusting component 19 is movably disposed on the first abutting portion 122 of the first zoom frame 12 . The first adjusting component 19 can be movably disposed on the first abutting portion 122 to abut against the second abutting portion 132 of the second zoom frame 13 . During the correction, the first adjusting element 19 is rotated to adjust the length of the first adjusting element 19 to extend out of the first zoom frame 12 to abut the second zoom frame 13 to adjust the second zoom lens. The relative position of the frame 13 and the first mirror group 101 is such that the two zoom frames 12, 13 have the same relative position as the first mirror group 101. Similarly, a second adjusting component 20 can be movably disposed on the first focusing frame 14 to abut against the third receiving portion 152 of the second focusing frame 15 to adjust the two focusing frames by the same principle. 14, 15 is relative to the photosensitive element 34 or the zoom lens group. Thereby, the imaging device 3 can appropriately generate a predetermined three-dimensional stereoscopic image.

1. . . Zoom and focus mechanism

10. . . case

101. . . First mirror group

11. . . Drive module

111. . . Drive shaft

1111. . . Thread part

112. . . Zoom and focus

1122. . . Focus section

1123. . . Top surface

12. . . First zoom frame

121, 131. . . Second mirror group

122. . . First abutment

13. . . Second zoom frame

132. . . Second abutment

14. . . First focus frame

141, 151. . . Third mirror group

15. . . Second focus frame

152. . . Third Attendance Department

Claims (10)

A zoom and focus mechanism comprising:
a housing having an accommodating space, and a first mirror group is disposed on one side wall of the housing;
A driving module is disposed in the accommodating space and located between the two first mirror groups, and includes:
a driving shaft having a threaded portion on the rod body; and a zooming and focusing member disposed on the threaded portion, wherein the zooming and focusing member is a bearing surface, and The column body is provided with a focusing portion, and the two ends of the focusing portion have a top abutting surface;
a first zoom frame is disposed on one side of the driving module, and has a second mirror group, the second mirror group is located on a first optical axis of one of the first mirror groups, the first The zoom frame extends a first bearing portion to the zoom and focus member, and bears against the bearing surface;
a second zoom frame is disposed on the other side of the driving module and has the second mirror group, wherein the second mirror group is located on a second optical axis of one of the other first mirror groups, The second zoom frame extends a second abutting portion to the first bearing portion and bears against the first bearing portion;
a first focusing frame is disposed on the side of the driving module, and has a third mirror group on the first optical axis, and the first focusing frame extends a guiding portion toward the focusing portion. And the guiding portion is located on the focusing portion; and a second focusing frame is disposed on the other side of the driving module, and has the third mirror group on the second optical axis, The second focusing frame extends a third bearing portion to the first focusing frame and bears against the first focusing frame;
When the driving shaft rotates, the first zoom frame and the second zoom frame or the first focus frame and the second focus frame are made by the zoom and the axial displacement or rotation of the focusing member. Axial displacement for zooming or focusing. The zooming and focusing mechanism of claim 1, wherein the driving module further comprises a driving unit, the driving shaft has a driving portion adjacent to one end of the two first mirror groups, and the driving portion is engaged with the driving portion a unit that rotates to drive the drive shaft. The zoom and focus mechanism of claim 1, wherein the first zoom frame and the second zoom frame are respectively provided with at least one first through hole, the first focus frame and the second focus The frame is respectively provided with at least one second through hole, and the zoom and focus mechanism further includes a plurality of guiding rods, each of the guiding rods is a cylindrical rod body, and is disposed at the at least one of the first zoom frames a through hole and the at least one second through hole of the first focus frame, and the at least one first through hole and the at least one second of the second focus frame Through hole. The zoom and focus mechanism of claim 3, wherein the at least one first through hole and the at least one second through hole are guided by the guiding rods, so that the first zoom frame, the first zoom frame The second zoom frame, the first focus frame and the second focus frame are stably axially displaced along the guiding rods. The zoom and focus mechanism of claim 3, further comprising at least one first elastic member and at least one second elastic member, the at least one first elastic member being sleeved on the guiding rods The first zoom frame or the second zoom frame is adjacent to the other side wall of the first focusing mirror frame, the at least one second elastic member is sleeved on the guiding rods, and is located at the first A focusing frame or the second focusing frame is adjacent to the housing between the side walls of the first zoom frame. The zoom and focus mechanism of claim 5, wherein the length of the at least one first elastic member that is not axially stretched is greater than the distance between the other side wall and the first zoom frame or the second zoom frame The maximum distance, the length of the at least one second elastic member that is not axially stretched is greater than the maximum distance between the sidewall and the first focus frame or the second focus frame. The zooming and focusing mechanism of claim 1, wherein the zooming and focusing member along the driving when the guiding portion of the first focusing frame touches one of the abutting surfaces of the focusing portion The shaft is axially displaced such that the first zoom frame and the second zoom frame simultaneously generate axial displacement for zooming. The zooming and focusing mechanism of claim 1, wherein the zooming and focusing member rotate when the guiding portion of the first focusing frame does not touch one of the abutting surfaces of the focusing portion. To perform the action of focusing;
When the zooming and focusing member rotates, the guiding portion of the first focusing frame is pulled by the inclined surface or the curved surface of the focusing portion, so that the first focusing frame and the second focusing frame synchronously generate an axial direction. Shift to focus the action. The zoom and focus mechanism of claim 1, further comprising a first adjusting component movably disposed on the first abutting portion of the first zoom frame to abut the second zoom The second bearing portion of the frame;
The relative position of the first zoom frame and the second zoom frame is adjusted by adjusting the length of the first adjusting element protruding from the first zoom frame. The zoom and focus mechanism of claim 1, further comprising a second adjusting component movably disposed on the first focusing frame to abut the third bearing of the second focusing frame Arrival
Adjusting a relative position of the first focusing frame and the second focusing frame by adjusting a length of the second adjusting component extending from the first focusing frame.