CN212231526U

CN212231526U - Convenient to use's centre gripping support

Info

Publication number: CN212231526U
Application number: CN202021241633.9U
Authority: CN
Inventors: 杨伟钊
Original assignee: Shenzhen Annaijia Electronics Co Ltd
Current assignee: Shenzhen Annaijia Electronics Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-12-25
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a clamping bracket with convenient use, which comprises a shell and a clamping arm component arranged on the shell; the clamping arm assembly comprises two clamping arms extending out of the left side and the right side of the shell, and the two clamping arms are synchronously opened, closed and linked through a linkage mechanism; the outer end of the clamping arm is connected with a clamping part through a first reset elastic element; the clamping part moves outwards relative to the outer end of the clamping arm under the action of an outward acting force, and automatically resets inwards under the action of the first reset elastic element when the outward acting force is relieved; so, realize that the tie gets and keep flat, convenient operation, simultaneously, it need not the roll adjustment once more to the centre gripping thing of small range size change, directly put into can, in addition, to electronic centre gripping support, if during electric fault or outage, also can directly take out the cell-phone, need not set up backup battery or electric capacity in electronic centre gripping support like traditional technique, saved the support cost.

Description

Convenient to use's centre gripping support

Technical Field

The utility model belongs to the technical field of the support field technique and specifically relates to indicate a convenient to use's centre gripping support, specifically can be memory support, electric support etc. and it is mainly but not limited to be used for the centre gripping location to mobile electronic products such as cell-phones.

Background

Most of the existing memory supports drive gears by pressing buttons on the shell or shifting switches on the shell to link the left and right arms to open or close; after the mobile phone is clamped, the current position is memorized, and the mobile phone is directly put in next time.

The memory support has the defects of troublesome use and operation and the like, such as: 1. for each size of mobile phone, the distance needs to be adjusted again, and especially for the same mobile phone of a user, the distance needs to be adjusted respectively under different situations such as a bare phone, a protective case and the like; 2. when the mobile phone is placed in the clamping part, the mobile phone needs to be inclined to one side, so that one side edge of the mobile phone firstly enters the inner side of one clamping part, and then the other side edge of the mobile phone enters the inner side of the other clamping part; when the mobile phone is taken out, the operation mode is the same, one side of the mobile phone is taken out obliquely outwards, and the other side of the mobile phone is taken out again.

In addition, the support still is not satisfactory to the aspect of the centre gripping steadiness to the cell-phone, especially has certain vibrations, rocks the application occasion of factor such as on-vehicle, appears the cell-phone more easily and shifts phenomenon such as pine even pine.

Therefore, a new technical solution needs to be developed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a clamping bracket with convenient use, which is easy to be horizontally placed and operated, and can be directly placed into an object to be clamped with a small size change without adjusting the distance again, and also can be directly taken out of the mobile phone for an electric clamping bracket if the mobile phone is in an electric failure or power failure, without providing a backup battery or a capacitor in the electric clamping bracket as in the conventional technology, thereby saving the cost of the bracket;

in order to achieve the above purpose, the utility model adopts the following technical scheme:

a clamping bracket convenient to use comprises a shell and a clamping arm component arranged on the shell; the clamping arm assembly comprises two clamping arms extending out of the left side and the right side of the shell, and the two clamping arms are synchronously opened, closed and linked through a linkage mechanism; the outer end of the clamping arm is connected with a clamping part through a first reset elastic element; the clamping part is moved outwards relative to the outer end of the clamping arm under the action of an outward acting force, and the clamping part automatically resets inwards under the action of the first reset elastic element after the outward acting force is relieved.

Preferably, one of the clamping part and the clamping arm is provided with a guide block extending in the left-right direction, the other one of the clamping part and the clamping arm is provided with a guide groove extending in the left-right direction, and the guide block is matched in the corresponding guide groove.

Preferably, the clamping portion has a front side splicing portion and a rear side splicing portion respectively located at the front side and the rear side of the clamping arm, the front side splicing portion and the rear side splicing portion are connected and positioned, and the first elastic resetting element is located between the front side splicing portion and the rear side splicing portion.

As a preferred scheme, the clamping arm is provided with a first hanging part, the front side splicing part or the rear side splicing part is provided with a second hanging part, and two ends of the first resetting elastic element are respectively hung on the first hanging part and the second hanging part; the front side splicing part or the rear side splicing part is provided with an upper side limiting wall and a lower side limiting wall, and the first reset elastic element is located between the upper side limiting wall and the lower side limiting wall.

As a preferable scheme, the inner side of the clamping part is provided with a rotating clamp, the rotating clamp can rotate left and right around a rotating shaft position extending up and down relative to the clamping part, and the rotating clamp is provided with a second reset elastic element so as to keep the rotating clamp in an inward clamping elastic force; when the object to be clamped is not placed in the rotary clamp, the rotary clamp is in a structure extending inwards from front to back.

Preferably, the front end of the rotating clamp is provided with a front side blocking part which is bent inwards and extends; after the clamped object is placed in the rotary clamp, the part of the rotary clamp corresponding to the rear side of the rotary shaft is pressed outwards to rotate, and the front side blocking part synchronously rotates inwards along with the rotary clamp so as to be limited to the front side of the clamped object.

As a preferable scheme, the inner side of the clamping part is provided with an accommodating concave position, and the clamping part is provided with a baffle positioned at the upper side and/or the lower side of the accommodating concave position; the part of the rotating clamp corresponding to the rear side of the rotating shaft is pressed outwards to be rotatably hidden in the accommodating concave position and limited by the baffle.

Preferably, the rear end of the rotating clamp is provided with a rear side blocking part which is bent inwards and extends.

Preferably, at least one of the clamping arms is provided with a third elastic resetting element, the housing is provided with a push switch for locking the position of the clamping arm, the push switch is pressed to release the locking, and the third elastic resetting element provides elastic resetting force to enable the clamping arm to automatically open outwards.

Preferably, the clamping bracket maintains the current clamping position by a locking mechanism; wherein:

the locking mechanism comprises a first locking swing rod and a fourth reset elastic element, the linkage mechanism is provided with a first gear part, the first gear part is locked by the first locking swing rod under the action of the first locking swing rod, and the first gear part is unlocked under the reset elasticity of the fourth reset elastic element when the first locking swing rod is released;

or the locking mechanism comprises a second locking swing rod and a second gear part fixed relative to the shell, and the linkage mechanism is provided with a third gear part; when the clamping arm is pulled, one end of the second locking swing rod concentrically and synchronously rotates around the third gear part, and the other end of the second locking swing rod rotates along with the third gear part to be locked at any gear position of the second gear part;

or the locking mechanism comprises a motor and a worm driven by the motor, the linkage mechanism is provided with a fourth gear part, and spiral teeth of the worm are meshed with the fourth gear part; the motor drives the clamping arms to correspondingly open and close during working, and the positions of the clamping arms are locked when the motor stops.

Compared with the prior art, the utility model has obvious advantages and beneficial effects, concretely speaking, can know from above-mentioned technical scheme, it is connected with clamping part through first elastic element that resets in the outer end of arm lock mainly, make clamping part can be relative arm lock displacement a segment distance, so, realize that the tie gets to keep flat, convenient operation, simultaneously, to the cell-phone that the size of the small scale changes, need not roll adjustment once more, directly put into can, and, the bare machine of the same cell-phone and take under different situations such as protective housing, all can be suitable for the same memory clamping position, user's use is more convenient; in addition, for the electric clamping support, if the electric fault or power failure occurs, the mobile phone can be directly taken out, and a standby battery or a capacitor does not need to be arranged in the electric clamping support like the traditional technology, so that the support cost is saved;

secondly, the inner side of the clamping part is provided with a rotary clamp which is provided with a second reset elastic element so as to keep the inward clamping elasticity of the rotary clamp, so that the mobile phone is clamped more tightly and the loosening phenomenon of the mobile phone is prevented; in particular, when the object to be clamped is not put in, the rotating clamp is in a structure extending from front to back inwards, so that: in the action process of putting the clamped object, the clamped object acts on the rotary clamp to be squeezed open by pressing force, so that on one hand, the clamped object is taken and put more smoothly, and on the other hand, the clamping tightness is further improved;

the arrangement of the front side blocking part and the rear side blocking part of the rotary clamp can limit the front side and the rear side of the mobile phone, so that the clamping reliability of the mobile phone is improved; and, hold the setting of establishing concave position, supply the swivel clamp to rotate outward and hide, the ingenious space that has utilized for whole supporting structure is compacter, and the rotation stroke of swivel clamp can play the guide effect, and the swivel clamp is hidden behind holding establishing concave position, and the swivel clamp phenomenon of rocking is difficult for appearing in the swivel clamp, has effectively protected the swivel clamp, has improved the centre gripping steadiness of swivel clamp to the cell-phone, also is favorable to the whole pleasing to the eye degree of support when the centre gripping is used.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is an assembly view of a first embodiment of the present invention (when a mobile phone is not inserted);

fig. 2 is a cross-sectional structural diagram of a first embodiment of the present invention (when a mobile phone is not inserted);

FIG. 3 is a diagram illustrating an exploded structure of a first embodiment of the present invention;

FIG. 4 is a partially exploded view of a first embodiment of the present invention;

FIG. 5 is a partial assembly diagram according to a first embodiment of the present invention;

FIG. 6 is a schematic view of another exploded structure of the first embodiment of the present invention;

FIG. 7 is a cross-sectional view of another embodiment of the present invention;

fig. 8 is another assembly view of the first embodiment of the present invention (after placing the mobile phone in it);

FIG. 9 is an exploded view of a second embodiment of the present invention;

fig. 10 is another exploded view of the second embodiment of the present invention;

fig. 11 is a cross-sectional view of a second embodiment of the present invention;

FIG. 12 is an assembled view of a third embodiment of the present invention;

FIG. 13 is an exploded view of a third embodiment of the present invention;

fig. 14 is another exploded view of the third embodiment of the present invention.

The attached drawings indicate the following:

front shell 11 of shell 10

Rear shell 12 panel 13

Bottom support arm 201 of clamping arm 20

First return spring element 40 clamp 30

Front side assembling part 301 and rear side assembling part 302

The concave position 31 is arranged in the position 303 of the rotating shaft

Baffle 32 first hanging part 21

Front stop 51 of rotary clamp 50

Back side block 52 soft plastic 501

Second restoring elastic element 60 third restoring elastic element 70

Locking tooth 811 of first locking swing rod 81

Fourth reset elastic element 82 first gear portion 83

Second gear portion 85 of second locking pendulum rod 84

Third gear 86 motor 87

Worm 88 fourth gear part 89

Guide block 1, guide groove 2

The second hanging part 3 has an upper side limiting wall 4

Lower limit wall 5 push switch 6

Wireless charging induction coil 7 circuit board 8

A motor base 9.

Detailed Description

Fig. 1 to 14 show specific structures of various embodiments of the present invention.

As shown in fig. 1 to 8, a specific structure of the first embodiment is shown.

A clamping bracket convenient to use comprises a shell 10 and a clamping arm component arranged on the shell 10; the clamping arm assembly includes two clamping arms 20 extending out of the left and right sides of the housing 10, the housing 10 generally includes a front housing 11 and a rear housing 12 assembled front and rear, and a front panel 13 is disposed at the front side of the front housing 11. The two clamping arms 20 are synchronously opened and closed and linked with each other through a linkage mechanism; generally, the linkage mechanism includes a transmission gear, and an upper rack portion and a lower rack portion respectively engaged with the upper end and the lower end of the transmission gear, and the upper rack portion and the lower rack portion are respectively disposed on the left and the right of the two clamping arms 20. The outer end of the clamping arm 20 is connected with a clamping part 30 through a first reset elastic element 40; the clamping portion 30 is moved outward relative to the outer ends of the clamping arms 20 by an outward acting force, and is automatically reset inward by the first reset elastic element 40 when the outward acting force is released. In general, the first restoring elastic element 40 may be a tension spring, a compression spring, an elastic sheet, or the like.

As shown in fig. 2 to 4, one of the clamping portion 30 and the clamping arm 20 is provided with a guide block 1 extending in the left-right direction, and the other is provided with a guide groove 2 extending in the left-right direction, and the guide block 1 is fitted into the corresponding guide groove 2. The clamping portion 30 has a front side splicing portion 301 and a rear side splicing portion 302 respectively located at the front side and the rear side of the clamping arm 20, the front side splicing portion 301 and the rear side splicing portion 302 are connected and positioned, and the first reset elastic element 40 is located between the front side splicing portion 301 and the rear side splicing portion 302. The clamping arm 20 is provided with a first hanging part 21, the front side splicing part 301 or the rear side splicing part 302 is provided with a second hanging part 3, and two ends of the first reset elastic element 40 are respectively hung on the first hanging part 21 and the second hanging part 3; the front side splicing part 301 or the rear side splicing part 302 is provided with an upper limiting wall 4 and a lower limiting wall 5, and the first reset elastic element 40 is positioned between the upper limiting wall 4 and the lower limiting wall 5.

As shown in fig. 2, 3 and 8, the rotating clip 50 is mounted inside the clamping portion 30, the rotating clip 50 is rotatable left and right relative to the clamping portion 30 around a vertically extending rotating shaft 303, and the rotating clip 50 is configured with a second return elastic element 60 to keep the rotating clip 50 in an inward clamping elastic force; when the object to be clamped is not inserted, the rotating clamp 50 is configured to extend inward from the front to the rear, and preferably, may be configured to extend obliquely inward from the front to the rear or extend in an arc shape, so that the object to be clamped is pushed outward by the pressing force applied to the rotating clamp 50 during the operation of inserting the object to be clamped. The front end of the rotating clamp 50 is provided with a front side stop part 51 which is bent inwards and extends; after the object is placed, the portion of the rotating clamp 50 corresponding to the rear side of the rotating shaft 303 is pressed outward and rotates, and the front stop 51 rotates inward synchronously to be limited to the front side of the object. The inner side of the clamping part 30 is provided with an accommodating concave position 31, and the clamping part 30 is provided with a baffle 32 positioned at the upper side and/or the lower side of the accommodating concave position 31; the portion of the rotating clip 50 corresponding to the rear side of the rotating shaft 303 is pressed to rotate outwards and hidden in the accommodating recess 31 and is limited by the baffle 32, as shown in fig. 8. The rear end of the rotating clip 50 has a rear stop portion 52 extending inward.

Typically, the inside of the rotating clamp 50 is provided with a soft glue 501, such as: silicone pieces, etc.; the soft rubber 501 is inwardly exposed from the inner side of the rotating clamp 50 to form a non-rigid contact with the object to be clamped.

As shown in fig. 5, at least one of the clamping arms 20 is provided with a third elastic return element 70, the housing 10 is provided with a push switch 6 for locking the position of the clamping arm 20, the push switch 6 is pressed to release the locking, and the third elastic return element 70 provides an elastic return force to automatically open the clamping arm 20.

As shown in fig. 5 to 7, the gripping bracket holds the current gripping position by a locking mechanism; wherein: the locking mechanism comprises a first locking swing rod 81 and a fourth reset elastic element 82, the linkage mechanism is provided with a first gear part 83, the first gear part 83 is positioned at the rear side of the transmission gear, and the first gear part 83 and the transmission gear are arranged coaxially. The first locking swing link 81 is acted to lock the first gear portion 83, and when the first locking swing link 81 is released, the first gear portion 83 is unlocked under the reset elasticity of the fourth reset elastic element 82; here, the first locking lever 81 is mounted to the housing 10 through a rotation fulcrum, an upper end of the first locking lever 81 is acted by the push switch 6, a lower end of the first locking lever 81 has a locking tooth 811 facing the first gear portion 83, and the fourth reset elastic member 82 is disposed against the lower end of the first locking lever 81 and/or the push switch 6 to provide a dual reset force; in a natural state, the locking teeth are clamped into the tooth sockets of the first gear part 83, the first gear part 83 is locked to prevent the first gear part from rotating, the push switch 6 is pressed, so that the upper end of the first locking swing rod 81 rotates downwards, the lower end of the first locking swing rod 81 synchronously rotates upwards to be separated from the tooth sockets of the first gear part 83, and the locking is released, in the first embodiment, the push switch 6 is pressed, and the clamping arms 20 automatically open outwards; after the mobile phone is placed in the clamping arm, the clamping arm 20 is pressed inwards to be folded inwards, so that the mobile phone is clamped; in the folding process of the clamping arm 20, the pressing switch 6 is used for intermittently unlocking the linkage mechanism, which is also referred to as an 'unlocking-locking' continuous switching cycle process, the clamping arm 20 is folded to any position, and the clamping arm 20 locks the current size when the hand is released, so that the clamping arm 20 can also be understood as a bracket which carries out 'memory' on the size of the currently clamped mobile phone; when the mobile phone needs to be taken out, the mobile phone can be taken out directly, and the clamping part 30 can slightly move elastically towards the outer side when the mobile phone is taken out, so that the mobile phone is taken out smoothly.

When the mobile phone needs to be placed next time, if the placed mobile phone and the last mobile phone are in a small-range size change range, the mobile phone does not need to be adjusted in distance again, and the mobile phone can be directly placed in the mobile phone, and the mobile phone can be suitable for the same memory clamping position without being adjusted in distance again under different conditions of a bare phone, a belt protection shell and the like of the same mobile phone.

When the mobile phone needs to be put in next time, if the size difference between the mobile phone to be put in and the mobile phone last time is larger, the clamping arms 20 can be automatically opened by pressing the press switch 6, then the mobile phone is put in, and then the clamping arms 20 are manually folded inwards to clamp the mobile phone.

If the third elastic return element 70 is not provided, the push switch 6 is pressed during operation, and the other hand pulls the clip arm 20 outwards at the same time of pressing, so that the clip arm can be pulled to a corresponding width as required.

As shown in fig. 9 to 11, a specific structure of the second embodiment is shown, which is different from the first embodiment mainly in that: the locking mechanism comprises a second locking swing rod 84 and a second gear part 85 fixed relative to the shell 10, and specifically, the second gear part 85 is arranged on the rear shell 12 in the form of an internal gear ring; the linkage mechanism is provided with a third gear part 86, the third gear part 86 is positioned at the rear side of the transmission gear, and the third gear part and the transmission gear are arranged coaxially; when the clamping arm 20 is pulled, one end of the second locking swing rod 84 concentrically and synchronously rotates around the third gear portion 86, and the other end of the second locking swing rod 84 rotates along with the third gear portion to be locked at any tooth position of the second gear portion 85; generally, a second locking tooth (the aforementioned locking tooth 811 is defined as a first locking tooth) may be provided at the other end of the second locking swing link 84. When the clamping arm is used, the clamping arm 20 needs to be pulled to control the clamping arm to be folded or unfolded, and the clamping arm keeps the current position state under the condition of no external force.

As shown in fig. 12 to 14, a specific structure of the third embodiment is shown, which is different from the first embodiment mainly in that: the locking mechanism comprises a motor 87 and a worm 88 driven by the motor 87, the linkage mechanism is provided with a fourth gear part 89, and the spiral teeth of the worm 88 are meshed with the fourth gear part 89; the motor 87 drives the clamping arm 20 to correspondingly open and close when in work, and the motor 87 locks the position of the clamping arm 20 when in stop. For the electric clamping support, if the electric fault or power failure occurs, the mobile phone can be directly taken out without depending on a standby battery or a capacitor as in the traditional technology. And the support can also be provided with a bottom support arm 201 to support the bottom of the mobile phone; a wireless charging unit may also be disposed in the bracket as required, and is generally disposed between the front shell 11 and the rear shell 12, specifically, the wireless charging unit (also referred to as the wireless charging induction coil 7) is disposed in the region between the front shell 11 and the clamping arm 20, and the circuit board 8 is disposed between the motor base 9 and the rear shell 12. Of course, in a non-powered cradle, the bottom support arm 201 and/or the cordless charging unit, circuit board, etc. may be provided as desired to add corresponding functionality to the cradle.

To sum up, the design of the utility model is characterized in that the outer end of the clamping arm is connected with the clamping part through the first reset elastic element, so that the clamping part can move a small distance relative to the clamping arm, thus realizing flat taking and flat placing, and convenient operation, meanwhile, for the mobile phone with small-scale size change, the mobile phone does not need to adjust the distance again and can be directly placed in, and the same memory clamping position can be applied to the same mobile phone under different situations such as the bare phone and the protective shell, and the use is more convenient for the user; in addition, for the electric clamping support, if the electric fault or power failure occurs, the mobile phone can be directly taken out, and a standby battery or a capacitor does not need to be arranged in the electric clamping support like the traditional technology, so that the support cost is saved;

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a convenient to use's centre gripping support which characterized in that: comprises a shell (10) and a clamping arm component arranged on the shell (10); the clamping arm assembly comprises two clamping arms (20) extending out of the left side and the right side of the shell (10), and the two clamping arms (20) are synchronously opened, closed and linked with each other through a linkage mechanism; the outer end of the clamping arm (20) is connected with a clamping part (30) through a first reset elastic element (40); the clamping part (30) moves outwards relative to the outer end of the clamping arm (20) under the action of an outward acting force, and the clamping part automatically resets inwards under the action of the first resetting elastic element (40) when the outward acting force is relieved.

2. A user-friendly clamping bracket as claimed in claim 1, wherein: one of the clamping part (30) and the clamping arm (20) is provided with a guide block (1) extending in the left-right direction, the other one of the clamping part and the clamping arm is provided with a guide groove (2) extending in the left-right direction, and the guide block (1) is adapted to the corresponding guide groove (2).

3. A user-friendly clamping bracket as claimed in claim 1 or claim 2, wherein: clamping part (30) have front side amalgamation portion (301), rear side amalgamation portion (302) that are located arm lock (20) front and rear side respectively, front side amalgamation portion (301), rear side amalgamation portion (302) are connected the location, first elastic element that resets (40) are located between front side amalgamation portion (301), rear side amalgamation portion (302).

4. A user-friendly clamping bracket as claimed in claim 3, wherein: the clamping arm (20) is provided with a first hanging part (21), the front side splicing part (301) or the rear side splicing part (302) is provided with a second hanging part (3), and two ends of the first reset elastic element (40) are respectively hung on the first hanging part (21) and the second hanging part (3); the front side splicing part (301) or the rear side splicing part (302) is provided with an upper side limiting wall (4) and a lower side limiting wall (5), and the first reset elastic element (40) is located between the upper side limiting wall (4) and the lower side limiting wall (5).

5. A user-friendly clamping bracket as claimed in claim 1, wherein: the inner side of the clamping part (30) is provided with a rotating clamp (50), the rotating clamp (50) can rotate left and right relative to the clamping part (30) around a rotating shaft position (303) extending up and down, and the rotating clamp (50) is provided with a second reset elastic element (60) so that the rotating clamp (50) keeps inward clamping elasticity; when the object to be clamped is not placed, the rotating clamp (50) is in a structure extending inwards from front to back.

6. A convenient to use holding bracket according to claim 5, characterized in that: the front end of the rotating clamp (50) is provided with a front side blocking part (51) which is bent inwards and extends; after the object to be clamped is placed in, the part of the rotating clamp (50) corresponding to the rear side of the rotating shaft position (303) is pressed outwards to rotate, and the front side blocking part (51) synchronously rotates inwards along with the rotating clamp so as to be limited to the front side of the object to be clamped.

7. A convenient to use holding bracket according to claim 5, characterized in that: the inner side of the clamping part (30) is provided with an accommodating concave position (31), and the clamping part (30) is provided with a baffle (32) positioned at the upper side and/or the lower side of the accommodating concave position (31); the part of the rotating clamp (50) corresponding to the rear side of the rotating shaft position (303) is pressed outwards to be rotatably hidden in the accommodating concave position (31) and is limited by the baffle plate (32).

8. A convenient to use holding bracket according to claim 5, characterized in that: the rear end of the rotating clamp (50) is provided with a rear side blocking part (52) which is bent inwards and extends.

9. A user-friendly clamping bracket as claimed in claim 1, wherein: at least one clamping arm (20) is provided with a third reset elastic element (70), the shell (10) is provided with a press switch (6) used for locking the position of the clamping arm (20), the press switch (6) is pressed to release the locking, and the third reset elastic element (70) provides reset elastic force to enable the clamping arm (20) to automatically open outwards.

10. A user-friendly clamping bracket as claimed in claim 1, wherein: the clamping bracket maintains the current clamping position through a locking mechanism; wherein:

the locking mechanism comprises a first locking swing rod (81) and a fourth reset elastic element (82), the linkage mechanism is provided with a first gear part (83), the first locking swing rod (81) is used for locking the first gear part (83), and when the first locking swing rod (81) is released, the first gear part (83) is unlocked under the reset elastic force of the fourth reset elastic element (82);

or the locking mechanism comprises a second locking swing rod (84) and a second gear part (85) fixed relative to the position of the shell (10), and the linkage mechanism is provided with a third gear part (86); when the clamping arm (20) is pulled, one end of the second locking swing rod (84) concentrically and synchronously rotates around the third gear part (86), and the other end of the second locking swing rod (84) rotates along with the third gear part to be locked at any tooth position of the second gear part (85);

or the locking mechanism comprises a motor (87) and a worm (88) driven by the motor (87), the linkage mechanism is provided with a fourth gear part (89), and the spiral teeth of the worm (88) are meshed with the fourth gear part (89); the motor (87) drives the clamping arm (20) to correspondingly open and close during working, and the position of the clamping arm (20) is locked when the motor (87) stops.