CN104075085A - Carrier - Google Patents

Abstract

The invention discloses a carrier which comprises a first rotating member, a second rotating member, a first driving portion and a bearing member. The second rotating member is rotatably connected with the first rotating member, the first driving portion is used for driving the first rotating member to rotate relatively to the second rotating member, the bearing member is connected with the second rotating member, the first rotating member comprises a first fixing support arm and a first fixing portion connected with the first fixing support arm, the first driving portion comprises a first rotating shaft penetrating the first fixing portion, the second rotating member and the first driving portion are positioned on two sides of the first fixing portion respectively, and the second rotating member is arranged on the first rotating shaft in a sleeved manner and is close to the first fixing portion. The carrier is small in size.

Description

carrier

【Technical field】

The present invention relates to a carrier.

【Background technique】

The carrier, on which the load can be mounted, is used to fix the load, adjust the posture of the load at will (for example: change the height, inclination and/or direction of the load) and keep the load stable in a determined posture. For example, when the carrying object is a camera or video camera, it can be mounted on the carrier to achieve stable, smooth and multi-angle shooting; when the carrying object is a microphone, it can be mounted on the carrier to obtain the user's voice more accurately.

The carrier of the related technology is used to support the load, which includes a first rotating part, a rotating shaft fixed on the first rotating part, a second rotating part connected with the rotating shaft and rotatable relative to the first rotating part and fixed on the The bearing part for supporting the load on the second rotating part.

The first rotating member first fixing arm and the first fixing part connected with the first fixing arm. The rotation shaft passes through the first fixing part. The second rotating member is sheathed on the end of the rotating shaft and away from the first fixing part.

However, the structure design of the carrier in the related art is unreasonable, resulting in a large volume of the carrier, which is not suitable for the development trend of thinner and lighter carriers. In addition, the second rotating part is fixed on the end of the rotating shaft, and it can rotate 360 degrees relative to the first rotating part. However, in some applications, the carrier needs to have a self-locking function, that is, the second rotating member cannot rotate in the original direction after being rotated to a certain angle (less than 360 degrees) relative to the first rotating member. The carrier in the related art cannot realize the self-locking function by means of the specific structure of the carrier.

Therefore, it is necessary to provide a new carrier to overcome the above disadvantages.

【Content of invention】

The purpose of the present invention is to provide a carrier with small volume and self-locking function.

The object of the present invention is achieved as follows: a carrier, which includes a first rotating member, a second rotating member connected in rotation with the first rotating member, and a first rotating member for driving the first rotating member to rotate relative to the second rotating member. The driving part and the bearing part connected with the second rotating part, the first rotating part includes a first fixing support arm and a first fixing part connected with the first fixing supporting arm, the first driving part includes a penetrating first fixing part of the first rotating shaft, wherein the second rotating part and the first driving part are located on both sides of the first fixed part, and the second rotating part is sleeved on the first rotating shaft and close to the first fixed part department.

Preferably, the first rotating part further includes a second fixing part which is separated from the first fixing part by a certain distance and connected to the first fixing support arm, the first driving part also passes through the second fixing part, and the The second rotating member is located between the first fixing part and the second fixing part.

Preferably, the first rotating member is further provided with a connecting wall connecting the first fixing part and the second fixing part, a receiving space jointly formed by the first fixing part, the second fixing part and the connecting wall, and passing through the connecting wall and A through opening communicating with the receiving space, the second rotating member is at least partially accommodated in the receiving space through the through opening.

Preferably, the connecting wall is provided with a first stopper and a second stopper at a certain distance from the first stopper, and the through opening is jointly formed by the first stopper and the second stopper, The carrier is also provided with a horizontal plane passing through the axis of the first rotating shaft, and the first stopper part and the second stopper part are respectively located on two sides of the horizontal plane.

Preferably, the distance from the first stopper to the horizontal plane is smaller than the distance from the second stopper to the horizontal plane.

Preferably, the second rotating member includes a rotating support arm sleeved on the first rotating shaft and a second fixing support arm bent and extended from one end of the rotating support arm.

Preferably, the second fixing part is provided with a second through hole penetrating therethrough, and the first driving part further includes a first support bearing sheathed on the first rotating shaft and accommodated in the second through hole.

Preferably, the rotating support arm is provided with a rotating rod and a first supporting arm shaft passing through the rotating rod, one end of the first supporting arm shaft is sleeved on the first rotating shaft, and the other end is inserted into the first supporting bearing.

Preferably, the second fixing part is further provided with a surrounding part away from the connecting wall for accommodating the first support bearing.

Preferably, the first support arm includes a horizontal support arm and a vertical support arm bent and extended from the horizontal support arm, and the first fixing part and the second fixing part are respectively connected to the vertical support arm and are away from the horizontal support arm. connected at one end.

Preferably, the carrier is provided with a potentiometer sleeved on the first rotating shaft.

Compared with related technologies, the carrier of the present invention has small volume and self-locking function.

【Description of drawings】

FIG. 1 is a perspective view of a carrier of the present invention and a carrier mounted thereon.

Fig. 2 is a perspective view of the carrier of the present invention without the carrier part from another perspective.

FIG. 3 is an exploded perspective view of the second rotating part of the carrier of the present invention.

FIG. 4 is an exploded perspective view of the first rotating part of the carrier of the present invention.

Fig. 5 is a schematic diagram of the positional relationship between the first rotating part and the second rotating part when the carrier of the present invention is in the first locking position when the first fixing part is removed.

FIG. 6 is a schematic diagram of the positional relationship between the first rotating member and the second rotating member when the carrier of the present invention is in the second locking position when the first fixing part is removed.

FIG. 7 is a perspective view of a carrier of the carrier of the present invention.

Fig. 8 is a schematic diagram of the flexible connection device of the carrier of the present invention.

Fig. 9 is a partial perspective view of the carrier of the present invention.

FIG. 10 is a schematic diagram of the carrier of the present invention with the first connecting portion pre-wound on the second rotating shaft portion.

FIG. 11 is a schematic diagram of a control method of a carrier driving device according to the present invention.

【Detailed ways】

The carrier of the present invention can carry loads on it, so as to fix the loads, adjust the posture of the loads at will (for example: change the height, inclination and/or direction of the loads) and keep the loads stably at In a determined posture. The carrier can be used as an auxiliary device for photography, photography, monitoring, and sampling, and can be applied to air-based (such as rotorcraft or fixed-wing aircraft), water-based (such as submarines or ships), road-based (such as motor vehicles) or space-based ( such as satellites, space stations, or spaceships). The carrying object may be an imaging device such as a camera or a video camera, or may be a sensor or the like. In this embodiment, the carrier is taken as an example of a mirrorless camera, and the carrier is applied to an aircraft to illustrate the beneficial effects of the present invention. The micro-single-camera can be fixed on the bearing part through the locking part. Of course, it can be understood that the bearer may also be other types of cameras or surveillance cameras. The carrier of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIGS. 1-11 , a carrier provided by an embodiment of the present invention is used to carry a carrier 1 and make it relatively stable. The carrier 100 includes a first rotating member 4, a second rotating member 6 connected in rotation with the first rotating member 4, a carrier 3 connected with the second rotating member 6, and a driving device for driving the second rotating member 4 and the carrier 3 (not numbered). The drive device includes a first drive part 5 for driving the first rotating part 4 to rotate relative to the second rotating part 6 , and a drive part 5 connected to the second rotating part 6 for driving the bearing part 3 to rotate relative to the second rotating part 6 The second driving part 7 , a posture detection module (not shown) located on the carrier 3 , and a controller (not shown) controlling the first driving part 5 and the second driving part 7 . The carrier 1 is mounted on a carrier 3 . The controller can be set on the carrier or separated from the carrier. The controller is used to send the first control command to the first drive part 5 ; it can also be used to send the second control command to the second drive part 7 . The carrier also includes a flexible connection device 2 for respectively providing driving signals and/or energy to the first driving part 5 and the second driving part 7 . The attitude detection module is mounted on the carrier 3 and is used to detect the attitude of the carrier 1 on the carrier 3 and generate an attitude signal to send to the controller.

The first driving part 5 includes a first driving motor 52 fixed on the first rotating member 4, a first driving motor housing 50 fixed on the first rotating member 4, and a first driving motor cover 50 electrically connected with the first driving motor 52 for driving the first A first drive module 56 that drives the motor 52 . The first driving motor 52 is provided with a first casing 53, a first stator (not shown) fixed on the first casing 53, a first rotor (not shown) rotating relative to the first stator, and a first The rotor is connected to a first rotating shaft 54 partially protruding from the first casing 53 and a first rotating bearing (not shown) accommodated in the first casing 53 and sheathed on the first rotating shaft 54 . The first driving part 5 further includes a first supporting bearing 55 sleeved on the first rotating shaft 54 and protruding from the first housing 53 . In this embodiment, the driving force of the first rotating shaft comes from the first driving motor. In fact, the driving force of the first rotating shaft can also be realized by other methods well known to those skilled in the art. In addition, the first support bearing can also be replaced by a shaft sleeve. The first driving module 56 includes a first motor driver 58 and a first potentiometer 57 on the first motor driver 58 . The first potentiometer 57 is inserted on the first rotating shaft 54 for measuring the positional relationship of the first rotor relative to the first stator, generating a first position signal and feeding the first position signal back to the first motor driver 58. Please refer to Fig. 11, when working, the posture detection module sends the posture signal of the load to the controller; the controller sends the first control command to the first motor driver according to the above posture signal; the first potentiometer generates the first position signal and The first position signal is fed back to the first motor driver, and the first motor driver drives the first drive motor according to the first position signal fed back by the first potentiometer and the first control instruction; the first drive motor rotates to change the position of the load attitude. In other optional implementation manners, the controller and the attitude detection module can be omitted, and the first motor driver can be activated by other methods known to those skilled in the art; the controller also needs to issue the first control command according to the attitude detection signal. How the first motor driver uses the first position signal to drive the first driving motor is a well-known technology in the industry, so it will not be repeated here.

The first rotating member 4 includes a first fixing arm 41 , a first fixing portion 43 connected to the first fixing arm 41 , a first fixing portion 43 separated from the first fixing portion 43 and connected to the first fixing arm 41 . Two fixing parts 42 , a connecting wall 44 connecting the first fixing part 43 and the second fixing part 42 , and a receiving space 45 jointly formed by the first fixing part 43 , the second fixing part 42 and the connecting wall 44 . The first support arm 41 includes a horizontal arm 411 and a vertical arm 412 extending from the horizontal arm 411 . The horizontal support arm 411 and the vertical support arm 412 are integrally formed. Certainly, in an optional embodiment, the horizontal support arm 411 and the vertical support arm 412 are connected separately. The vertical arm 412 is provided with a first penetration hole 4121 through which the flexible connection device passes.

The first fixing part 43 and the second fixing part 42 are oppositely arranged and respectively connected to one end of the vertical arm 412 away from the horizontal arm 411 . In this embodiment, the first fixing arm 41 and the second fixing part 42 are integrated; the first fixing part 42 is fixed on the second fixing part 42 by a fastener (not labeled), that is: the first The fixing part 43 is provided separately from the first fixing support arm 41 and the second fixing part 42 . In other optional implementation manners, the first fixing support arm, the first fixing portion and the second fixing portion may be integrated.

The first fixing portion 43 is used to fix the first driving motor 52 and has a first through hole 431 extending therethrough. The second fixing part 42 is provided with a bottom plate 421, a second through hole 422 penetrating through the bottom plate 421 for receiving the first support bearing 55, and extending from the bottom plate 421 to a direction away from the connecting wall 44 and surrounding the second through hole 422. The surrounding portion 423 on which the first support bearing 55 is accommodated. In this way, the first support bearing 55 is disposed away from the first fixing portion 43 . In this embodiment, the second through hole 422 and the surrounding portion 423 jointly accommodate the first support bearing 55 . In other optional implementation manners, only the second through hole may be used to accommodate the first support bearing, so as to realize the fixing of the first rotating shaft relative to the first rotating member. Just make sure the bottom plate has enough thickness. The geometric center of the second through hole and the rotation center of the first support bearing are respectively located on the axis of the first rotating shaft. When assembled, the first rotating shaft 54 passes through the second through hole 422 and the first through hole 431 respectively. In addition, the connecting wall 44 is provided with a first stop portion 441 and a second stop portion 442 opposite to the first stop portion 441 and a joint formed jointly by the first stop portion 441 and the second stop portion 442. A through opening 443 communicating with the receiving space 45 .

The second rotating member 6 is partially accommodated in the receiving space 45 of the first rotating member 4 through the through opening 443 . The second rotating member 6 includes a rotating support arm 61 sleeved on the first rotating shaft 54 and a second fixing support arm 62 bent and extended from one end of the rotating support arm 61 . The rotating arm 61 is provided with a rotating rod 611 and a first arm shaft 612 passing through the rotating rod 611 . The first arm shaft 612 includes a first arm shaft 6121 located on one side of the rotating rod 611 and a second arm rotating shaft 6122 located on the other side of the rotating rod 612 . During assembly, the first arm rotating shaft 6121 is sleeved on the first rotating shaft 54 of the first driving motor 52 of the first driving part 5 and accommodated in the accommodation space 45 of the first rotating member 4; the second arm The rotating shaft 6122 is inserted into the first supporting bearing 55 . The first supporting bearing 55 realizes the rotational connection between the first supporting bearing 55 and the first rotating shaft 54 through the first supporting arm rotating shaft 6121 and the second supporting arm rotating shaft 6122 . Driven by the first drive motor 52, the second rotating member 6 can rotate up and down relative to the vertical arm 412; in addition, the first supporting bearing and the first rotating bearing can prevent the first rotating shaft and The axial offset of the first arm shaft enables the power of the first rotating shaft to be more stably transmitted to the second rotating member. In other optional implementation manners, the first support arm shaft may be omitted. The first rotating shaft directly passes through the rotating rod to realize the rotational connection between the second rotating member and the first rotating shaft, and at the same time, the first supporting bearing is directly sleeved on the first rotating shaft. In addition, the second support arm 62 is provided with a support arm portion 622 , an insertion hole 621 passing through the support arm portion 622 , and a winding portion extending from the support arm portion 622 away from the support arm portion 622 and arranged around the second rotating shaft 721 623 and a blocking portion 624 extending from the winding portion 623 to away from the support arm portion 622 .

The second drive part 7 is fixed on the second support arm 62 and partially inserted into the insertion hole 621 of the second support arm 62, which includes a second drive unit fixed on one side of the second support arm 62. The motor cover 73, the second drive motor 72 fixed on the second drive motor cover 73, the second drive module 77 that drives the second drive motor 72, and the second drive module 77 that is fixed on the other side of the second support arm 62 and away from the second drive motor 72 provided support housing 74 . The second driving motor 72 includes a second stator (not shown), a second rotor (not shown), a second rotating shaft 721 and a second rotating bearing (not shown) fixed on the second rotating shaft 721 . The supporting shell 74 has a receiving cavity 741 . The second driving part 7 is further provided with a second support arm shaft 75 sleeved on the second rotation shaft 721 . The second arm shaft 75 includes a third arm shaft 751 rotatably connected to the second rotation shaft 721, a fourth arm shaft 752 inserted into the receiving cavity 741, and a fourth arm shaft 752 sleeved and accommodated. The second support bearing 753 inside the winding portion 623 of the second support arm 62 . The support bearing 7 may be accommodated in both the insertion hole and the wrapping portion, or only in the insertion hole. Similarly, the second support arm shaft can also be omitted, and it is also feasible that the bearing member is directly connected to the second rotating shaft and the second supporting bearing is directly sleeved on the second rotating shaft. The second rotating bearing can also be replaced by a shaft sleeve.

The second driving module 77 includes a second motor driver 76 and a second potentiometer 71 on the second motor driver 76 . The second potentiometer 71 is inserted on the second rotating shaft 721 for measuring the positional relationship of the second rotor relative to the second stator, generating a second position signal and feeding the second position signal back to the second motor driver 76 . Please refer to Figure 11, when working: the attitude detection module sends the attitude signal of the load to the controller; the controller sends a second control command to the second motor driver according to the attitude signal; the second potentiometer generates the second position signal and The second position signal is fed back to the second motor driver, and the second motor driver drives the second drive motor according to the second position signal fed back by the second potentiometer and the second control command; the second drive motor rotates to change the load attitude. In other optional implementation manners, the controller and the posture detection module can be omitted, and the second motor driver can be activated by other methods known to those skilled in the art; the controller also needs to issue a second control command according to the posture detection signal. In addition, the controller can simultaneously send out the first control command and the second control command according to the attitude signal, so that the first driving part and the second driving part rotate at the same time, that is, the second rotating part and the carrier part rotate at the same time, thereby improving the stability of the carrier. responding speed. Of course, the controller can also send out the first control command first and then the second control command according to the attitude signal; or the controller can send out the second control command first and then the first control command; or only the first control command; or only the second 2. Control instructions. As above, how the second motor driver uses the second position signal to drive the second driving motor is also a well-known technology in the industry, so it will not be repeated here.

The carrier 3 includes a base plate 31, a plurality of holding plates 32 extending from the base plate 31 facing each other, a cover plate 35 connecting the holding plates 32, and a cover plate 35 extending from the base plate 31 between two adjacent holding plates 32. The fixed plate 33 and the bearing shaft 34 extending from the fixed plate 33 and rotatably connected with the fourth arm shaft 752 . The second rotating shaft 721 transmits the power to the bearing shaft 34 of the supporting member 3 through the second supporting arm rotating shaft 75, so that the supporting member 3 can move forward and backward relative to the vertical supporting arm 412 driven by the second rotating shaft 721 Flip (or called pitch, look up flip). The bearing shaft 34 includes an inner ring 341 sleeved on the second arm shaft 75 , an outer ring 342 separated from the inner ring 341 by a certain distance, an extension 343 connecting the inner ring 341 and the outer ring 342 , and extending from the outer ring 342 . The limiting slot 344 is recessed toward the inner ring 341 .

The flexible connecting device 2 includes a first end portion 21 connected to the carrier 3, a first connecting portion 22 extending from the first end portion 21, a second end portion 23 extending from the end of the first connecting portion 22, and The third end portion 24 connected to the second end portion 23 , the second connecting portion 25 respectively connected to the second end portion 23 and the third end portion 24 , and the fourth end portion 26 connected to the end of the second connecting portion 25 .

When assembled, the fourth end portion 26 is connected to the first drive module 56; the second connecting portion 25 extends along the vertical arm 412 of the first rotating member 4 and penetrates into the first penetration hole 4121 and is then accommodated in the storage In the space 45, the second connecting part 25 is sandwiched between the connecting wall 44 and the rotating support arm 611 of the second rotating member 6 and between the first fixing part 43 and the second fixing part 42, and then through the The through opening 433 passes through the first rotating member 4 and surrounds the rotating support arm 611 of the second rotating member 6 . The first connecting part 22 is pre-wound on the winding part 623 and the bearing shaft 34 of the bearing part 3 at the same time, and the second end part 23 is connected with the second driving module 76 of the second support arm 62. The first end portion 21 is connected to the base plate 31 of the carrier 3 . Through the above connection methods, external electrical signals or other signals can be provided to the first drive part, the second drive part and the carrier through the flexible connection device. In addition, the carrier mounted on the carrier can also obtain the above-mentioned signals at the same time. The flexible connection device can be a flexible circuit board (FPC), an electric wire or a cable, etc., which can be wound and can provide the above-mentioned signals for the first driving part, the second driving part and the carrier. In an optional embodiment, the winding part and the bearing shaft can be omitted, and the first connecting part is pre-wound on the second arm shaft. As mentioned above, the second support arm shaft can also be omitted, then the first connecting portion is directly pre-wound on the second rotation shaft. In this embodiment, the second connecting portion is arranged around the rotating arm of the second rotating member, so the length of the second connecting portion should ensure that the second rotating member can freely switch between the first locking position and the second locking position.

During operation, when the second rotating member 6 abuts against the first stop portion 411 and the second stop portion 412 of the first rotating member 4, it cannot rotate, and the self-locking of the carrier 100 is realized. Function. When the second rotating member 6 abuts against the first stop portion 441 , it is the first locking position of the carrier 100 of the present invention; when the second rotating member 6 abuts against the second stop portion 442 , is the second locking position of the carrier 100 of the present invention. Therefore, the setting of the through opening 433 is related to the maximum rotation angle of the second rotating member 6 . In this embodiment, the carrier 100 is provided with a horizontal plane 51 passing through the axis of the first rotating shaft 54 . The second rotating member 6 is provided with a rotation axis 63 , that is, the second rotating member 6 rotates relative to the first rotating member 4 around the rotation axis 63 .

When the carrier 100 is in the first locking position, the rotation axis 63 of the second rotating member 6 forms a first angle A with the horizontal plane 51; when the carrier 100 is in the second locking position, the second rotating member 6 The rotation axis 63 and the horizontal plane 51 form a second angle B. By controlling the size of the first angle A and the second angle B, that is, controlling the specific positions of the first stopper 441 and the second stopper 442, the first locking position and the second locking position of the second rotating member 6 can be controlled. Second locked position. The carrier 4 of this embodiment takes a mirrorless camera as an example. If the first angle A and the second angle B are both 50 degrees, the carrier of the present invention can be combined with an aircraft to achieve aerial panoramic shooting. In addition, when the first included angle A is smaller than the second included angle B, in particular, when the first included angle A is 40 degrees and the second included angle B is 110 degrees, the carrier of the present invention can also be combined with the aircraft to achieve general aerial photography needs.

The second rotating member is sleeved on the first rotating shaft and close to the first fixing part, which reduces the volume of the carrier.

In addition, in the carrier of the present invention, the second rotating member at least partially protrudes from the through opening, and by controlling the distance between the first stopper and the second stopper, the rotation angle of the second rotating member is effectively limited to meet the actual requirements. application needs.

The "horizontal", "vertical", "upper" and "lower" mentioned in this embodiment refer to the determined positions where the carrier is subjected to the gravitational force of the earth and is in a natural placement state.

The above descriptions are only preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments, but all equivalent modifications or changes made by those of ordinary skill in the art according to the disclosure of the present invention should be included within the scope of protection described in the claims.

Claims (12)

1. a carrier, it comprises the first rotating component, the second rotating component being rotatedly connected with the first rotating component, for the first drive portion and the load-bearing member being connected with the second rotating component that drives the first rotating component to rotate with respect to the second rotating component, described the first rotating component comprises the first fixing support arm and the first fixing part being connected with the first fixing support arm, described the first drive portion comprises the first rotatingshaft that runs through the first fixing part, it is characterized in that: described the second rotating component and the first drive portion are positioned at respectively the both sides of the first fixing part, and the second rotating component is set on the first rotatingshaft and near described the first fixing part.

2. carrier as claimed in claim 1, it is characterized in that: described the first rotating component also comprises the second fixing part separated by a distance with the first fixing part and that be connected with the first fixing support arm, described the first drive portion also runs through described the second fixing part, and described the second rotating component is between the first fixing part and the second fixing part.

3. carrier as claimed in claim 2, it is characterized in that: described the first rotating component is also provided with and connects the first fixing part and the connecting wall of the second fixing part, the containing space jointly being formed by the first fixing part, the second fixing part and connecting wall and the impenetrating mouth that runs through connecting wall and communicate with containing space, and described the second rotating component is contained in described containing space at least partly by described impenetrating mouth.

4. carrier as claimed in claim 3, it is characterized in that: described connecting wall be provided with the first blocked part and with the second blocked part separated by a distance, the first blocked part, described impenetrating mouth is formed jointly by the first blocked part and the second blocked part, described carrier is also provided with the horizontal plane through the axis of the first rotatingshaft, and described the first blocked part and the second blocked part are positioned at respectively the both sides of horizontal plane.

5. carrier as claimed in claim 3, is characterized in that: described the first blocked part is less than the second blocked part to the distance of horizontal plane to the distance of horizontal plane.

6. carrier as claimed in claim 2, is characterized in that: described the second rotating component comprises the second fixing support arm that one end bending of the rotating support arm that is set on the first rotatingshaft and autorotation support arm is extended.

7. carrier as claimed in claim 6, is characterized in that: described the second fixing part is provided with the second penetration hole running through on it, and described the first drive portion also comprises and is set on the first rotatingshaft and accommodates the first spring bearing with the second penetration hole.

8. carrier as claimed in claim 6, is characterized in that: described the second fixing part is provided with the second penetration hole running through on it, and described the first drive portion also comprises and is set on the first rotatingshaft and accommodates the axle sleeve with the second penetration hole.

9. carrier as claimed in claim 7, is characterized in that: described rotating support arm is provided with dwang and runs through the first support arm shaft of dwang, and described first support arm shaft one end is set on the first rotatingshaft, and the other end is inserted in the first spring bearing.

10. carrier as claimed in claim 7, is characterized in that: described the second fixing part be also provided with away from connecting wall for accommodate the first spring bearing around portion.

11. carriers as claimed in claim 2, it is characterized in that: described the first fixing support arm comprises horizontal mounting arm and the vertical support arm extending from horizontal mounting arm bending, and described the first fixing part is connected with one end away from horizontal mounting arm on vertical support arm respectively with the second fixing part.

12. carriers as claimed in claim 1, is characterized in that: described carrier is provided with the potentiometer being set on the first rotatingshaft.