GB2577344A

GB2577344A - Lens clamping device and portable image acquisition device

Info

Publication number: GB2577344A
Application number: GB1817674.3A
Authority: GB
Inventors: Chen Xusheng
Original assignee: Augustt Tech Ltd
Current assignee: Augustt Tech Ltd
Priority date: 2018-09-21
Filing date: 2018-10-30
Publication date: 2020-03-25
Also published as: KR20200034543A; AU2018247257A1; CN108980585A; GB201817674D0

Abstract

A lens clamping device 1 is provided with a lower clamping portion 2 for fixing a lens, an upper clamping portion 3, and a hinge shaft and a torsional spring 4. Two clamping assemblies are set symmetrically at two ends of the upper clamping portion and they have a telescopic rod assembly 51, a clamping rod 52 , and an elastic element (spring 53 and slider 54, figure 3) set between the telescopic rod assembly and the clamping rod. The terminal end of the telescopic rod assembly is provided with a final stage telescopic rod, and a terminal end of the final stage telescopic rod is provided with a transverse chute (513, figure 3) and a vertical chute (514, figure 3), and a fan-shaped mounting groove (515, figure 3)located at a vertical end of the transverse chute and the vertical chute.

Description

Intellectual Property Office Application No. GII1817674.3 RTM Date:21 April 2019 The following terms are registered trade marks and should be read as such wherever they occur in this document: WiFi Bluetooth Intellectual Property Office is an operating name of the Patent Office www.gov.uk /ipo

LENS CLAMPING DEVICE AND PORTABLE IMAGE

ACQUISITION DEVICE

CROSS REFERENCE TO RELATED APPLICATION

[00011The present application claims a priority of a Chinese application with an application No. CN201811108849.5, field on September 21, 2018 and entitled with "lens clamping device and portable image acquisition device".

FIELD OF THE INVENTION

[0002] The present application relates to an auxiliary device for a touch screen mobile device, and more particularly to a lens clamping device which could he used for a mobile phone or a tablet computer and a portable image acquisition device.

BACKGROUND OF THE INVENTION

[0003] At present, people like to take pictures with a mobile phone, a tablet computer, etc., and on the market there arc corresponding clamping devices for fixing the lens on the shooting device, but most of the clamping devices will block a part of the display when they clamp the shooting device, so that the photographer could not see the full picture. Especially for a full screen mobile phone, the existing lens clamping device for mobile phone is inconvenient to use.

[0004] And people are getting used to separate the mobile phone and the shooting device to do some shooting or video. Especially in zoos with glass fences for protection or some public places, split-type shooting device (that's image acquisition device) cannot be fixed, and use a tripod structure to fix will take up a lot of space. Therefore, it is necessary to develop a new type of lens clamping device and a portable image acquisition device that could be connected to a mobile phone or a tablet computer.

SUMMARY OF THE INVENTION

[00051 In order to overcome the above deficiencies of the prior art, the embodiments of the present application provide a lens clamping device that uses a clip with a telescopic rod to 1 clamp the lens on the camera of the mobile phone and uses clamping rod to clamp the edge of the mobile phone.

[0006] The embodiments of the present application further provide a portable image acquisition device.

[00071 The technical solution of the present application is: a lens clamping device, being provided with: a lower clamping portion for fixing a lens, an upper clamping portion, and a hinge shaft for hinge connecting the lower clamping portion and the upper clamping portion, and a torsional spring sleeved on the hinge shaft for generating a clamping force; two clamping assemblies set symmetrically at two ends of the upper clamping portion, and the clamping assembly comprises a telescopic rod assembly, a clamping rod rotatably connected to a terminal end of the telescopic rod assembly, and an elastic element set between the telescopic rod assembly and the clamping rod; the terminal end of the telescopic rod assembly is provided with a final stage telescopic rod, and a terminal end of the final stage telescopic rod is provided with a transverse chute and a vertical chute which form an L-shape, and a fan-shaped mounting groove located at a vertical end of the transverse chute and the vertical chute; two straight sides of the fan-shaped mounting groove are coincident with extension lines of the transverse chute and the vertical chute, and the fan-shaped mounting groove are connected to the transverse chute and the vertical chute; wherein, when the clamping rod is rotated to a vertical position, the elastic element presses the clamping rod into the vertical chute; when the clamping rod is rotated to a horizontal position, the elastic element presses the clamping rod into the transverse chute.

[0008] The further technical solution is: the lower clamping portion is provided with a mounting hole for mounting the lens, and a light transmission hole at an upper end of the mounting hole; an inner wall of the mounting hole is provided with an internal thread for mounting the lens, and an upper end surface of the lower clamping portion is provided with a cushion.

[0009] The further technical solution is: the elastic clement comprises a spring and a slider fixed to a terminal end of the spring; the clamping rod comprises a clamping arm and a clamping end fixed to a lower end of the clamping arm; the clamping arm is provided with a fixed end for fixing the elastic element, and a chute located in the inner side; the spring is installed in the chute, and a head of the spring is fixed to the fixed end; the slider is slidably connected to the chute, and the slider and the fan-shaped mounting groove are slidably connected and are in close contact.

[0010] The further technical solution is: the elastic element is a spring; the clamping rod is provided with a fixed end for fixing the elastic element; the fixed end is provided with a fixing groove for mounting the spring; a head of the spring is fixed to the fixed end, and a tail of the spring is slidably connected and pressed against the fan-shaped mounting groove.

[00111 The further technical solution is: the clamping rod comprises a front clamping part and a rear clamping part which are symmetrically set, and the front clamping part and the rear damping part are fixed by screws.

[0012] The further technical solution is: the telescopic rod assembly is further provided with a plurality of stages of telescopic rods for elongation located before the final stage telescopic rod; a section of the telescopic rod is a rectangular, and a length along a stress direction of clamping is more than twice the transverse width.

[0013]The further technical solution is: a middle portion of an outer end of the transverse chute and the vertical chute is provided with a circular arc transition portion, and on the slider is provided with a pulley which acts on the circular arc transition portion, an outer end of the transverse chute and an outer end of the vertical chute.

[0014] The further technical solution is: the clamping rod is provided with a clamping end and a rib portion perpendicular to the clamping end, and a bottom of the clamping end is provided with a soft rubber block; the soft rubber block is provided with a flange portion, and the flange portion is used to against the side of a mobile phone or a tablet computer, which could he used for positioning, and a width of the flange portion is less than a quarter of the overall width of the soft rubber block.

[0015] A portable image acquisition device, comprising the aforementioned lens clamping device; a circuit board is set in the inner side of the upper clamping portion, and on the circuit board are provided with a microcontroller, and a power module, a CCD sensor and a wireless communication module which are connected to the microcontroller; the CCD sensor is corresponding to the light transmission hole set in the lower clamping portion; and the portable image acquisition device further comprises a lens detachably connected to the lower clamping portion.

100161 The further technical solution is: the lens is an electrically adjustable lens, and the lens is provided with a lens driving mechanism, and the microcontroller is provided with a driving circuit electrically connected to the lens driving mechanism; an output interface of the driving circuit is set at the mounting hole in the lower clamping portion which is connected to the lens.

100171 Compared with the prior art, the technical effect of the present application is: a lens clamping device uses an upper clamping portion and a lower clamping portion to clamp the shooting device, and the ends of the upper clamping portion are provided with two clamping assemblies, and the clamping assembly comprises a telescopic rod assembly, a clamping rod and an elastic dement. The length of the telescopic rod assembly could he adjusted according to the size of the shooting device, and after being pressed into the vertical chute by (he elastic element, the clamping rod could clamp (he edge of the shooting device without blocking the display screen of the shooting device, which will not affect people to see the entire shooting picture when taking pictures. When not shooting, rotate the clamping rod for 90°, and press the clamping rod into the transverse chute by the elastic element, and retract the telescopic rod, so when the clamping device is not used, the whole volume is relatively small and is convenient to carry.

[0018] Further, the lower clamping portion is provided with the mounting hole for mounting the lens, and the light transmission hole, so use the light transmission hole to position the camera, so that the optical path of the lens and the camera are the same, thereby reducing the focusing operation. The inner wall of the mounting hole is provided with internal threads, so the lens could be conveniently installed in the lower clamping portion, and when not in use, the lens could he conveniently disassembled.

[0019] Further, the upper end surface of the lower clamping portion is provided with a cushion, and when the clamping device clamps the mobile phone, the cushion could prevent the clamping device from scratching the housing of the mobile phone.

[0020] Further, the clamping end of the clamping rod is provided with the fixed end for fixing the elastic element, and a chute located in the inner side, and a slider slidably connected to the chute is set between the spring and the clamping arm, and the spring is installed in the chute, and the two ends of the spring are respectively fixed to the fixed end and the slider, and the slider and the fan-shaped mounting groove are slidably connected and are in close contact. When the clamping rod is pulled down, the spring is compressed in the chute, and the slider is pressed against the inner wall of the fan-shaped mounting groove, and the spring will not bend when the clamping rod rotates.

100211 Further, the fixed end of the clamping rod is provided with the fixing groove for mounting the spring, and when the clamping rod rotates in the fan-shaped mounting groove, the spring is accommodated in the fixing groove and rotates synchronously with the clamping rod, and will not bend by the friction of the inner wall of the fan-shaped mounting groove.

100221 Further, the clamping rod comprises a front clamping part and a rear clamping part set symmetrically, and the two parts are fixed by screws, so as to facilitate the installation of the spring and the slider, and provide conditions for the clamping arm with the fixed end to be mounted in the fan-shaped mounting groove.

[0023] Further, the clamping rod is provided with the damping end and the rib portion perpendicular to the clamping end, and when the damping device clamps the shooting device, the rib portion could match the edge of the shooting device to form a positioning structure.

[0024] Further, the bottom of the clamping end is provided with the soft rubber block, and when the clamping rod clamps the edge of the mobile phone, the soft rubber block contacts the screen or the housing of the shooting device, thereby reducing the damage caused by the large clamping force. The flange portion is provided for positioning and preventing transverse sliding, and the width of the flange portion is less than a quarter of the overall width of the soft rubber block, so that the force acting on the soft rubber block is still on the front screen of the mobile phone or the tablet computer.

[0025] The portable image acquisition device of the present application is provided with a CCD sensor and a microcontroller in the inner side of the upper damping portion, and the acquired image is wirelessly transmitted to the mobile phone or the tablet computer through the WIFI module or the Bluetooth module. For example, in a zoo or the like, a user can carry a mobile phone or a tablet computer with him, and the lens clamping device is fixed on a glass fence. When there is no glass as the fixed carrier, a support plate with a through hole can also be used as the fixed carrier. A driving mechanism for lens focusing is also provided in the lower clamping portion, and wireless electro motion focusing could be realized by the control of the microcontroller, which is suitable for shooting places that are not easy for the photographer to approach, such as shooting of animals. It could also he used for the monitoring of various show windows.

[0026] The present application will he further described Belo in conjunction with the accompanying drawings and the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 is a perspective view of a lens clamping device of the present application; [0028] FIG. 2 is another perspective view of the embodiment of FIG. 1; [0029] FIG. 3 is a partial enlarged view of the embodiment of FIG. 1; [0030] FIG. 4 is a circuit block diagram of a portable image acquisition device of the present application.

[0031] Reference numbers 1 Clamping device 2 Lower clamping portion 21 Cushion 22 Mounting hole 23 Light transmission hole 3 Upper clamping portion 4 Torsional spring 5 Clamping assembly 51 Telescopic rod assembly 511 Final stage telescopic rod 512 First stage telescopic rod 513 Transverse chute 514 Vertical chute 515 Fan-shaped mounting groove 52 Clamping rod 521 front clamping part 522 Clamping aim 522A chute 523 Clamping end 53 spring 54 slider 6 Shooting device

DESCRIPTION OF THE EMBODIMENTS

[0032] In order to more fully understand the technical content of the present application, the technical solutions of the present application will be further described and illustrated below in conjunction with the schematic drawings, but are not limited thereto.

[0033] As shown in FIG. 1, a lens (not shown) clamping device 1 comprises: a lower clamping portion 2 for fixing a lens (not shown), an upper clamping portion 3, and a hinge shaft (not shown) for hinge connecting the lower clamping portion 2 and the upper clamping portion 3 and a torsional spring 4 sleeved on the hinge shaft for generating a clamping force, and two clamping assemblies 5 set symmetrically at the ends of the upper clamping portion 3. The lower clamping portion 2 clamps the back of the shooting device 6, and the two ends of the torsional spring 4 respectively press the lower clamping portion 2 and the upper clamping portion 3, so that the upper clamping portion 3 exerts a clamping force on the clamping assembly 5.

[0034] The clamping assembly 5 comprises a telescopic rod assembly 51, a clamping rod 52 rotatably connected to the terminal end of the telescopic rod assembly 51, and an elastic element (refer to FIG. 3) set between the telescopic rod assembly 51 and the clamping rod 52.

[0035] The telescopic rod assembly 51 is provided with a final stage telescopic rod 511 at the terminal end, a first stage telescopic rod 512 fixed to the end of the upper clamping portion 3, and a plurality of stages of telescopic rods (not shown in the figure) for elongation sequentially nested in the first stage telescopic rod 512. When the clamping device 1 clamps the shooting device 6, sequentially pull out the telescopic rod assembly 51 to apply the width of the shooting device 6, and the upper clamping portion 3 does not contact with the screen of the shooting device 6, so that the photographer can completely see the entire shooting picture when taking picture.

[0036] The clamping rod 52 is provided with a clamping end 523, and the bottom of the clamping end 523 is provided with a soft rubber block (not shown in the figure), and when the clamping rod clamps the shooting device 6, the soft rubber block (not shown in the figure) is in direct contact with the screen or the housing of the shooting device 6, to reduce the clamping marks on the housing caused by the large clamping force. When the clamping rod 52 is used to clamp the shooting device 6, rotate the clamping rod to a position perpendicular to the final stage telescopic rod 511, and engage the clamping rod with the vertical chute (in conjunction with FIG. 3) under the top pressure of the elastic clement (in conjunction with FIG. 3). so that the clamping end 523 clamps to the edge of the shooting device 6. When people don't need to clamp the shooting device 6, rotate the clamping lever 52 to a position collinear with the final stage telescopic rod 511, and retract the telescopic rod assembly 51 into the first stage telescopic rod 512, so the volume of the whole clamping device 1 is not big, and does not take up a lot of space.

[0037] The upper end surface of the lower clamping portion 2 is provided with a cushion 21, and when the clamping device 1 clamps the shooting device 6, the cushion 21 comes into contact with the housing of the shooting device 6, which will not generate clamping mark on the housing.

[0038] As shown in FIG. 2, the lower damping portion 2 is provided with a mounting hole 22 for mounting the lens (not shown in the figure), and a light transmission hole 23 at the upper end of the mounting hole 22. The inner wall of the mounting hole 22 is provided with internal threads (not shown in the figure) for mounting the lens (not shown in the figure), and the lens (not shown in the figure) and the clamping device 1 are connected and fixed by the internal threads (not shown in the figure), and the disassembly and the installation of the lens (not shown in the figure) are very convenient.

[0039] The lower clamping portion 2 is positioned by the inner wall of the light transmission hole 23 and the camera of the shooting device 6, and the optical path of the camera coincides with the optical path of the lens (not shown in the figure), to achieve an ideal shooting effect.

[0040] As shown in FIG. 3, the terminal end of the final stage telescopic rod 511 is provided with a transverse chute 513 and a vertical chute 514 which form an L-shape, and a fan-shaped mounting groove 515 located at the vertical end of the transverse chute 513 and the vertical chute 514. The two straight sides of the fan-shaped mounting groove 515 arc coincident with the extension lines of the transverse chute 513 and the vertical chute 514, and the fan-shaped mounting groove 515 are connected to the transverse chute 513 and the vertical chute 514. The fan-shaped mounting groove 515 is located at the lower part of the extension lines of the transverse chute 513 and the vertical chute 514 and is located at the outer part of the final stage telescopic rod 511.

[0041] The elastic element comprises a spring 53 and a slider 54 fixed to the terminal of the spring 53. The damping rod 52 comprises a front clamping part 521 and a rear clamping part (not shown in the figure) set symmetrically, and the two parts are fixed by screws (not shown in the figure). After installing the spring 53 and the slider 54, install the front clamping part 521 and the rear clamping part (not shown in the figure) on the transverse chute 513 or the vertical chute 514, and then fix the two parts together by screw (not shown in the figure).

[0042] The front clamping part 521 comprises a clamping arm 522 and a clamping end 523 fixed to the lower end of the clamping arm 522. The clamping arm 522 is provided with a fixed end (not shown in the figure) for fixing the elastic element, and a chute 522A located in the inner side. The spring 53 is installed in the chute 522A, and its head is fixed to the fixed end (not shown in the figure). The slider 54 is slidably connected to the chute 522A, and the slider 54 and the fan-shaped mounting groove 515 are slidably connected and are in close contact. The outer surface of the slider 54 matches the inner surface of the fan-shaped mounting groove 515. When the clamping rod 52 exits either of the transverse chute 513 and the vertical chute 514, the spring 53 is compressed in the chute 522A and does not bent by the rotation of the clamping rod 52.

[0043] When the clamping rod 52 is rotated to a vertical position, the spring 53 presses it into the vertical chute 514, so the clamping rod 52 cannot rotate any further, so as to form a stable structure capable of clamping the shooting device (in conjunction with FIG. 1). When the clamping rod 52 is rotated to a horizontal position collinear with the final stage telescopic rod 511, the spring 53 presses it into the transverse chute 513, and the clamping rod 52 retracts into the telescopic rod assembly 51 together with the final stage telescopic rod 511. When people switch the clamping rod 52 between the vertical state and the horizontal state, people need to pull the clamping rod 52 out of the transverse chute 513 or the vertical chute 514 and rotate it in the fan-shaped mounting groove 515.

[0044] The intersection end of the transverse chute 513 and the vertical chute 514 is transitionally connected by a circular arc structure (not shown in the figure, and it may also refer to that the middle portion of the outer end of the transverse chute and the vertical chute is provided with a circular are transition portion), so that when the clamping rod switches the state, it could smoothly enter or exit the transverse chute 513 or the vertical chute 514.

[0045] In other embodiments, the slider is provided with a pulley that acts on the circular arc transition portion, the outer end of the transverse chute and the outer end of the vertical chute. In this case, when the clamping rod switches, since the sliding friction becomes the rolling friction, the resistance becomes small, so a user does not need to use too much force, particularly suitable for a female user.

[0046] In other embodiments, the inner wall of the mounting hole is provided with a ring magnet for absorbing the lens, and when people need to install the lens, the lens could be directly absorbed to the lower damping portion by the ring magnet.

[0047] In other embodiments, the clamping rod is further provided with a clamping end and a rib portion perpendicular to the clamping end, and the rib portion is configured to match the side of the shooting device to form a positioning structure, so that the clamping end could vertically clamp the shooting device.

[0048] In other embodiments, the elastic element between the telescopic rod assembly and the clamping rod is a spring which is pressed against the clamping rod and the inner wall of the fan-shaped mounting groove. The clamping rod is provided with a fixed end for fixing the spring, and the fixed end is provided with a fixing groove for mounting the spring, and the head of the spring is fixed to the fixed end, and the tail of the spring is slidably connected and pressed against the fan-shaped mounting groove.

[0049] In other embodiments, the soft rubber block is provided with a flange portion, and the flange portion is used to against the side of the mobile phone or the tablet computer, which could he used for positioning, and the width of the flange portion is less than a quarter of the overall width of the soft rubber block. The flange portion provided is for positioning and preventing transverse sliding, and the width of the flange portion is less than a quarter of (he overall width of the soft rubber block, so that the force acting on the soft rubber block is still on the front screen of the mobile phone or the tablet computer.

[0050] A portable image acquisition device of the present application comprises the aforementioned lens clamping device; a circuit board 70 is set in the inner side of the upper clamping portion, as shown in FIG. 4, and on the circuit board 70 are provided with a microcontroller 71, and a power module 72, a CCD sensor 73 and a wireless communication module 74 which are connected to the microcontroller 71; the CCD sensor 73 is corresponding to the light transmission hole set in the lower clamping portion; and the portable image acquisition device further comprises a lens detachably connected to the lower clamping portion. The portable image acquisition device adopts the above-mentioned scalable clamping device, and the clamping device is not only more stable to damp, but also small in size and easy to carry, when retracting. The wireless communication module 74 may be a Bluetooth communication module or a WIFI module. A control button 75 could also be added to control the opening and closing of the portable image acquisition device, to realize the delay or liming function. An interface 76 for wired communication connection could also be added for short-distance control, for example, when watching a performance, fix the portable image acquisition device on a glass plate with a support rod, so as to improve the shooting height, obtain more and better scenery, and then take a better picture or video.

[0051] Preferably, the lens is an electrically adjustable lens, and the lens is provided with a lens driving mechanism, and the microcontroller is further provided with a driving circuit electrically connected to the lens driving mechanism; and an output interface of the driving circuit is set at the mounting hole in the lower clamping portion that is connected to the lens.

100521 The portable image acquisition device of the present application is provided with a CCD sensor and a microcontroller in the inner side of the upper damping portion, and the acquired image is wirelessly transmitted to the mobile phone or the tablet computer through the WIFI module or the Bluetooth module. For example, in a zoo or the like, a user can carry a mobile phone or a tablet computer with him, and the lens clamping device is fixed on a glass fence. When there is no glass as the fixed carrier, a support plate with a through hole can also he used as the fixed carrier. A driving mechanism for lens focusing is also provided at the lower clamping portion, and wireless clectro motion focusing could be realized by the control of the microcontroller, which is suitable for shooting places that are not easy for the photographer to approach, such as shooting of animals. It could also he used for the monitoring of various show windows. For specific use, the portable image acquisition device could be fixed at the edge of the glass plate of the show window, and the stationary or adjustable lens (that is, the side the lower clamping portion locates) is set outside the glass plate, and the CCD sensor and the microcontroller (that is, the side the upper clamping portion locates) is set inside the glass plate. The important components are set at the inside, which is more secure.

[0053] The above further describes the technical content of the present application only by the embodiments, to facilitate the reader to easily understand, but does not mean that the embodiments of the present application are limited thereto, and any technology extending or re-creating according to the present application is subject to the protection of the present application. The protection scope of the present application is subject to the claims.

Claims

CLAIMSWhat is claimed is: I. A lens clamping device, being provided with: a lower clamping portion for fixing a lens, an upper clamping portion, and a hinge shall for hinge connecting the lower clamping portion and the upper clamping portion, and a torsional spring sleeved on the hinge shaft for generating a damping force; two clamping assemblies set symmetrically at two ends of the upper clamping portion, and the clamping assembly comprises a telescopic rod assembly, a clamping rod rotatably connected to a terminal end of the telescopic rod assembly, and an elastic element set between the telescopic rod assembly and the clamping rod; the terminal end of the telescopic rod assembly is provided with a final stage telescopic rod, and a terminal end of the final stage telescopic rod is provided with a transverse chute and a vertical chute which form an L-shape, and a fan-shaped mounting groove located at a vertical end of the transverse chute and the vertical chute; two straight sides of the fan-shaped mounting groove are coincident with extension lines of the transverse chute and the vertical chute, and the fan-shaped mounting groove are connected to the transverse chute and the vertical chute; wherein, when the clamping rod is rotated to a vertical position, the elastic element presses the clamping rod into the vertical chute; when the clamping rod is rotated to a horizontal position, the elastic element presses the clamping rod into the transverse chute.
2. The lens clamping device according to claim 1, wherein the lower clamping portion is provided with a mounting hole for mounting the lens, and a light transmission hole at an upper end of the mounting hole; an inner wall of the mounting hole is provided with an internal thread for mounting the lens, and an upper end surface of the lower clamping portion is provided with a cushion.
3. The lens clamping device according to claim 1, wherein the elastic clement comprises a spring and a slider fixed to a terminal end of the spring; the clamping rod comprises a clamping 12 arm and a clamping end fixed to a lower end of the clamping arm; the clamping arm is provided with a fixed end for fixing the elastic element, and a chute located in the inner side; the spring is installed in the chute, and a head of the spring is fixed to the fixed end; the slider is slidably connected to the chute, and the slider and the fan-shaped mounting groove are slidably connected and are in close contact.
4. The lens clamping device according to claim 1, wherein the elastic element is a spring; the clamping rod is provided with a fixed end for fixing the elastic element; the fixed end is provided with a fixing groove for mounting the spring; a head of the spring is fixed to the fixed end, and a tail of the spring is slidably connected and pressed against the fan-shaped mounting groove.
5. The lens clamping device according to claim 3, wherein the clamping rod comprises a front clamping part and a rear clamping part which are symmetrically set, and the front damping part and the rear clamping part are fixed by screws.
6. The lens clamping device according to claim 1, wherein the telescopic rod assembly is further provided with a plurality of stages of telescopic rods for elongation located before the final stage telescopic rod; a section of the telescopic rod is a rectangular,and a length along a stress direction of clamping is more than twice the transverse width.
7. The lens clamping device according to claim 3, wherein a middle portion of an outer end of the transverse chute and the vertical chute is provided with a circular arc transition portion, and on the slider is provided with a pulley which acts on the circular arc transition portion, an outer end of the transverse chute and an outer end of the vertical chute.
8. The lens clamping device according to claim 1, wherein the clamping rod is provided with a clamping end and a rib portion perpendicular to the clamping end, and a bottom of the clamping end is provided with a soft rubber block; the soft rubber block is provided with a flange portion, and the flange portion is used to against the side of a mobile phone or a tablet computer, which could be used for positioning, and a width of the flange portion is less than a quarter of the overall width of the soft rubber block.
9. A portable image acquisition device, comprising the lens clamping device according to any one of claims 1 to 8; a circuit board is set in the inner side of the upper clamping portion, and on the circuit board are provided with a microcontroller, and a power module, a CCD sensor and a wireless communication module which are connected to the microcontroller; the CCD sensor is corresponding to the light transmission hole set in the lower clamping portion; and the portable image acquisition device further comprises a lens detachably connected to the lower clamping portion.
10. The portable image acquisition device according to claim 9, the lens is an electrically adjustable lens, and the lens is provided with a lens driving mechanism, and the microcontroller is provided with a driving circuit electrically connected to the lens driving mechanism; an output interface of the driving circuit is set at the mounting hole in the lower clamping portion which is connected to the lens.