CN218137437U - Fixing device - Google Patents

Abstract

The application discloses a fixing device, be used for fixed product, including locating component, press and hold subassembly and pull rod assembly, locating component can fix a position the product, press and hold the subassembly and locate locating component, can hold the product pressure in locating component, pull rod assembly includes first pull rod, the first link, head rod and driving piece, the first link is connected to the one end of first pull rod, the other end can pass locating component and press and hold the subassembly, driving piece fixed connection locating component, the driving piece is connected to the one end of head rod, the head rod is connected to the other end, the head rod is equipped with spherical convex surface, the first link is equipped with spherical concave surface, the first pull rod of driving piece drive is to keeping away from the direction removal that presses and hold the subassembly, make the first link rotate through spherical concave surface and spherical convex surface relative head rod, the first link drives the removal of first pull rod, make the first pull rod can drive and press and hold the subassembly and press and hold the product. Compared with manual tightening and loosening screws, the fixing device improves production efficiency.

Description

Fixing device

Technical Field

The application relates to a product location processing field especially relates to a fixing device.

Background

In order to ensure the yield of production in the production process, the product needs to be positioned and fixed and then processed, a screw is usually adopted to lock a pressing plate, the product is pressed tightly through the pressing plate, but before and after processing, the product needs to be replaced by manually tightening and loosening the screw, so that the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a fixing device, which can improve the efficiency of fixing products and the production efficiency.

The embodiment of the application provides a fixing device for fix a position and fixed product position, hold subassembly and pull rod assembly including locating component, pressure, locating component can fix a position the product, the pressure is held the subassembly and is located locating component can with the product pressure hold in locating component, pull rod assembly include first pull rod, first link block, head rod and driving piece, the one end of first pull rod is connected first link block, the other end can pass locating component with the pressure holds the subassembly, driving piece fixed connection locating component, the one end of head rod is connected the driving piece, the other end is connected the first link block, the head rod is equipped with spherical convex surface, the first link block is equipped with spherical concave surface, spherical convex surface contact is connected spherical concave surface, the driving piece drive the first pull rod is to keeping away from the direction of pressure holds the subassembly removes, makes the first link block passes through spherical convex surface and spherical concave surface are relative the head rod rotates, and makes the first link block drives the first pull rod removes, makes the pressure holds the subassembly can drive the product.

The embodiment of the application comprises the following technical effects: the first pull rod is driven by the driving piece to move towards the direction away from the pressing and holding assembly, the spherical concave surface is rotated relative to the spherical convex surface, the first connecting block is rotated relative to the first connecting rod, the first connecting block drives the first pull rod to move, the first pull rod can drive the pressing and holding assembly to press and hold a product, and compared with an artificial elastic screw, the product fixing efficiency and the production efficiency are improved.

Optionally, in some embodiments of the present application, an end of the first pull rod away from the first connecting block is provided with a first bump, the pressing and holding assembly includes a first pressing block and a shifting block, the shifting block is slidably connected to the first pressing block, the shifting block is provided with a first hole and a second hole which are communicated with each other, an aperture of the first hole is larger than an aperture of the second hole, an outer diameter of the first bump is larger than an aperture of the second hole and smaller than an outer diameter of the first hole, the first pull rod passes through the first pressing block and the first hole, the shifting block is opposite to the first pressing block, so that the first pull rod passes through the second hole, and the first bump pressing and holding shifting block is facilitated by the first hole and the second hole which are provided with the communication.

Optionally, in some embodiments of the present application, the first pressing block is provided with a magnetic attraction piece, and the magnetic attraction piece can attract the shifting block, so that the shifting block slides relative to the first connecting block, thereby facilitating the resetting of the shifting block.

Optionally, in some embodiments of the present application, the first pressing block is provided with a chute arranged obliquely, and the shifting block is provided with a convex portion, and the convex portion is slidably arranged in the chute.

Optionally, in some embodiments of the application, the pull rod assembly further includes a second pull rod, one end of the second pull rod is connected to the first connecting block, the other end of the second pull rod passes through the pressing component and is provided with a second protruding block, a vertical distance between the first protruding block and the pressing component is smaller than a vertical distance between the second protruding block and the pressing component, the driving member drives the first pull rod and the second pull rod to move, so that the first protruding block is pressed on the pressing component before the second protruding block, and unbalanced force on the shifting block caused when the shifting block is simultaneously pressed by the first pull rod and the second pull rod is avoided.

Optionally, in some embodiments of this application, the pull rod assembly further includes a first bolt, the first pull rod deviates from the one end of holding the subassembly is equipped with logical groove, first bolt fixed connection the first link, second pull rod fixed connection the one end of first bolt, the activity of the first bolt other end is located lead to the groove, first lug take the lead press in hold the subassembly back, the first link drives the first link removes, makes the first bolt is in it removes to lead to the inslot, is used for driving the second pull rod continues to remove, makes the second lug press in hold the subassembly, can make first pull rod and second pull rod not press simultaneously and hold the shifting block, avoid shifting block atress unbalanced.

Optionally, in some embodiments of the present application, the pull rod assembly further includes a limiting block and a first elastic member, the limiting block is connected to the first connecting block, the first pull rod is disposed through the limiting block, the first elastic member is sleeved on the first pull rod, one end of the first elastic member abuts against the first connecting block, the other end of the first elastic member abuts against the limiting block, and the first protruding block can be kept pressed against the shifting block.

Optionally, in some embodiments of the present application, the pull rod assembly further includes a third pull rod and a fourth pull rod, the third pull rod and the fourth pull rod are connected to the first connection block, the first pull rod and the third pull rod are diagonally disposed, the second pull rod and the fourth pull rod are diagonally disposed, and the first pull rod and the third pull rod are pressed on the shifting block before the second pull rod and the fourth pull rod.

Optionally, in some embodiments of the present application, the first pressing block is provided with a first guide pillar and a second guide pillar, the first guide pillar and the second guide pillar penetrate through the shifting block, and the shifting block is slidably connected to the first pressing block relative to the arrangement direction of the first guide pillar and the second guide pillar.

Optionally, in some embodiments of the present application, the positioning assembly includes a first positioning plate and a second positioning plate, the first positioning plate is provided with a profile modeling supporting block, the second positioning plate is provided with a positioning groove, the profile modeling supporting block is arranged on the second positioning plate and arranged in the positioning groove, and the profile modeling supporting block can support the inner surface of the product.

Drawings

Fig. 1 illustrates a schematic structural view of a fixing device in one embodiment.

Fig. 2 shows a schematic structural diagram of a product in an embodiment.

FIG. 3 is a schematic diagram of the positioning assembly and the pressing assembly in one embodiment.

Fig. 4 is a schematic structural diagram of a pressing component in an embodiment.

Fig. 5 is a schematic structural diagram illustrating another state of the pressing member in one embodiment.

FIG. 6 is a schematic diagram of a tie rod assembly and a clamping assembly in one embodiment.

Figure 7 illustrates a partial cross-sectional view of a fixation device in one embodiment.

FIG. 8 illustrates a schematic partial cross-sectional view of a tie rod assembly according to one embodiment.

Description of the main elements

Fastening device 100

Positioning assembly 10

First fixing plate 11

Support column 12

Second fixing plate 13

First positioning plate 14

Positioning pin 141

Profiling supporting block 142

Second positioning plate 15

Positioning groove 151

First supporting block 151a

Second supporting block 151b

Pressing and holding assembly 20

First press block 21

First guide post 211

Second guide post 212

Chute 213

Shifting block 22

Opening 22a

Limiting hole 22b

Convex part 221

First hole 222

Second hole 223

Drawbar assembly 30

First pull rod 31

Connecting part 311

First bump 312

Through groove 313

First connecting block 32

Pull-down block 321

First bolt 3211

Pull rod locking piece 322

Spherical concave surface 322a

First connecting rod 33

Spherical convex surface 331

Drive member 34

Second pull rod 35

Second bump 351

Stopper 36

First elastic member 37

Third pull rod 38

Fourth pull rod 39

Product 200

First plate 201

Through hole 201a

Side wall 202

The following specific examples will further illustrate the application in conjunction with the above figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The embodiment of the application provides a fixing device, be used for location and fixed product position, including locating component, press and hold subassembly and pull rod assembly, locating component can fix a position the product, press and hold the subassembly and locate locating component, can press and hold the product in locating component, pull rod assembly includes first pull rod, first link block, head rod and driving piece, first link block is connected to the one end of first pull rod, the other end can pass locating component and press and hold the subassembly, driving piece fixed connection locating component, the driving piece is connected to the one end of head rod, the head rod is connected to the other end, the head rod is equipped with spherical convex surface, the first link block is equipped with spherical concave surface, spherical concave surface is connected in spherical convex surface contact, the driving piece drives first pull rod and moves to the direction of keeping away from and holding the subassembly, make first link block rotate through spherical convex surface and spherical concave surface relative head rod, and make first link block drive first pull rod and move, make first pull rod can drive and press and hold the subassembly and hold the product. The first pull rod is driven by the driving piece to move towards the direction away from the pressing and holding assembly, the spherical concave surface rotates relative to the spherical convex surface, the first connecting block rotates relative to the first connecting rod, the first connecting block drives the first pull rod to move, the first pull rod can drive the pressing and holding assembly to press and hold a product, and compared with an artificial tightening screw, the production efficiency is improved.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, the fixing device 100 is used for positioning and fixing the position of the product 200. In an embodiment, the product 200 comprises a first plate 201 and a sidewall 202 extending from the first plate 201, the first plate 201 being provided with a through hole 201a. The fixture 100 holds the first plate 201 in a pressing manner for cooperating with an external processing device to process the outer surface of the sidewall 202 on at least one side. The fixing device 100 comprises a positioning assembly 10, a pressing assembly 20 and a pull rod assembly 30, wherein the positioning assembly 10 is used for placing the product 200 and can position the product 200. The pressing component 20 is disposed on the positioning component 10, and can press and hold the product 200 on the positioning component 10. The pull rod assembly 30 is connected to a side of the positioning assembly 10 away from the pressing assembly 20, and the pull rod assembly 30 is connected to the pressing assembly 20, so as to pull the pressing assembly 20 and drive the pressing assembly 20 to press the product 200.

Referring to fig. 1 and 3, in an embodiment, the positioning assembly 10 includes a first fixing plate 11, a plurality of supporting columns 12 and a second fixing plate 13, wherein the first fixing plate 11 is connected to one end of the plurality of supporting columns 12, and the other end of the plurality of supporting columns 12 is connected to the second fixing plate 13. An accommodating space is formed between the first fixing plate 11 and the second fixing plate 13, and the pull rod assembly 30 is fixedly connected with the second fixing plate 13 and is arranged in the accommodating space.

In one embodiment, the positioning assembly 10 further includes a first positioning plate 14 and a second positioning plate 15. The first positioning plate 14 is fixedly connected to one side of the first fixing plate 11 departing from the second fixing plate 13, and the second positioning plate 15 is fixedly connected to one side of the first positioning plate 14 departing from the first fixing plate 11. The first positioning plate 14 is provided with a plurality of positioning pins 141 for positioning the second positioning plate 15. The first positioning plate 14 is provided with a profiling supporting block 142, the second positioning plate 15 is provided with a positioning groove 151, the profiling supporting block 142 penetrates through the positioning groove 151, and the profiling supporting block 142 is matched with the structure of the inner surface of the product 200 and can support the inner surface of the first plate 201 of the product 200. The positioning groove 151 has first and second supporting blocks 151a and 151b provided at adjacent sides thereof to support the sidewalls 202 of the products 200. It can be understood that the first and second supporting blocks 151a and 151b are flexible or elastic supporting blocks, and thus are prevented from being in hard contact with the product 200 to damage the product 200.

Referring to fig. 4 and 5, in an embodiment, the pressing component 20 includes a first pressing block 21, a shifting block 22 and a second pressing block 23. The first pressing block 21 is connected with the second pressing block 23, and the shifting block 22 is connected with one side of the first pressing block 21, which is far away from the second pressing block 23. The second press block 23 is used for contacting the connection product 200. The side of second block 23 facing away from first block 21 has a mating contour to the outer surface of product 200. The first pressing block 21, the shifting block 22 and the second pressing block 23 are all provided with holes communicated with the through hole 201a for the pull rod assembly 30 to pass through.

In an embodiment, the first pressing block 21 is provided with a first guide pillar 211 and a second guide pillar 212, and the first guide pillar 211 and the second guide pillar 212 are disposed through the shifting block 22. Specifically, the shifting block 22 is provided with an opening 22a and a limiting hole 22b, the first guide post 211 is arranged in the opening 22a, the limiting hole 22b is a closed-loop hole, the second guide post 212 is arranged in the limiting hole 22b, the limiting hole 22b comprises a long hole, and the second guide post 212 can move in the limiting hole 22 b.

In one embodiment, the two opposite sides of the first pressing block 21 are provided with oblique sliding grooves 213, the shifting block 22 is provided with a protrusion 221, and when the shifting block 22 is connected with the first pressing block 21, the protrusion 221 is arranged in the sliding groove 213. The shifting block 22 can slide relative to the first pressing block 21 through the sliding groove 213 in the arrangement direction of the first guide pillar 211 and the second guide pillar 212, so that the shifting block 22 is separated from or connected with the first pressing block 21, the position of the shifting block 22 is limited through the first guide pillar 211 and the second guide pillar 212, and the shifting block 22 is prevented from falling off from the first pressing block 21.

In an embodiment, a magnetic element (not shown) is disposed inside the first pressing block 21, and after the shifting block 22 moves away from the first pressing block 21, the magnetic element can attract the shifting block 22, so that the shifting block 22 resets, slides toward the first pressing block 21 and is in contact with the first pressing block 21.

In one embodiment, the dial 22 is provided with a first hole 222 and a second hole 223 which are communicated, and the diameter of the first hole 222 is larger than that of the second hole 223. By shifting the shifting block 22, the shifting block 22 is moved away from the first pressing block 21, the pull rod assembly 30 can penetrate through the shifting block 22 from the first hole 222, then the magnetic attraction element attracts the shifting block 22, and after the shifting block 22 is reset, the pull rod assembly 30 is arranged in the second hole 223, so that the pull rod assembly 30 can contact with the upper surface of the shifting block 22 and pull the shifting block 22, and the second pressing block 23 is driven to press and hold the product 200. It is understood that the number of the first holes 222 and the second holes 223 is the same, and the number of any one of the first holes 222 and the second holes 223 is the same as the number of the positions that the product 200 needs to be pressed, and the number of the first holes 222 and the second holes 223 may be adjusted according to the number of the positions that the product 200 needs to be pressed.

Referring to fig. 1, 5, 7 and 8, the pull rod assembly 30 includes a first pull rod 31, a first connecting block 32, a first connecting rod 33 and a driving member 34. The driving member 34 is fixedly connected to the second fixing plate 13, one end of the first connecting rod 33 is connected to the driving member 34, the other end of the first connecting rod is connected to the first connecting block 32, one end of the first pull rod 31 is connected to the first connecting block 32, and the other end of the first pull rod passes through the positioning assembly 10, the product 200, the second pressing block 23, the shifting block 22 and the first pressing block 21 and extends out of the first pressing block 21.

In an embodiment, the first pull rod 31 includes a connecting portion 311 and a first protrusion 312, one end of the connecting portion 311 is connected to the first connecting block 32, and the other end is provided with the first protrusion 312. The outer diameter of the connecting portion 311 is smaller than the outer diameter of the first bump 312, and the outer diameter of the connecting portion 311 is also smaller than the diameter of the second hole 223. The outer diameter of the first bump 312 is smaller than the aperture of the first hole 222 and larger than the aperture of the second hole 223. When the first pull rod 31 is matched with the pressing component 20, the shifting block 22 is shifted, the shifting block 22 moves away from the first pressing block 21, the connecting part 311 and the first bump 312 penetrate through the shifting block 22 from the first hole 222, then the magnetic suction piece adsorbs the shifting block 22, after the shifting block 22 is reset, the connecting part 311 is located in the second hole 223 due to the movement of the shifting block 22, and the first bump 312 extends out of the second hole 223. When the driving member 34 drives the first connecting rod 33 to move in a direction away from the shifting block 22, the first connecting block 32 is driven to move, the first connecting block 32 drives the first pull rod 31 to move in a direction away from the shifting block 22, so that the first protrusion 312 is pressed and held on the periphery of the second hole 223, and the second pressing block 23 is driven to press and hold the product 300.

In one embodiment, the first connecting block 32 includes a pull-down block 321 and a pull-rod locking block 322, the pull-down block 321 connects the pull-rod locking block 322, the first pull rod 31 connects the pull-down block 321, and the first connecting rod 33 connects the pull-down block 321. The rod locking block 322 has a spherical concave surface 322a, the first connecting rod 33 has a spherical convex surface 331, and the spherical convex surface 331 contacts and connects with the spherical concave surface 322a. When the driving member 34 drives the first connecting rod 33 to move in a direction away from the shifting block 22, the first connecting block 32 is driven to move, so that the whole first connecting block 32 and the first pull rod 31 can rotate relative to the first connecting rod 33, and further the angles of the first connecting block 32 and the first pull rod 31 are adaptively adjusted, so that the pulling force of the first bump 312 is uniformly applied to the surface of the shifting block 22.

In an embodiment, the pull-down block 321 is provided with a first latch 3211, the first latch 3211 is fixed in the pull-down block 321, and the first rod 31 is connected to the first latch 3211.

In an embodiment, a through groove 313 is formed on one side of the first pull rod 31 connected to the pull-down block 321, and the pull rod assembly 30 further includes a second pull rod 35, one end of the second pull rod 35 is connected to the pull-down block 321, and the other end thereof passes through the dial 22 and is provided with a second protrusion 351. One end of the first latch 3211 is fixedly connected to the second rod 35, and the other end is movably disposed in the through slot 313. By providing the through groove 313, the pull-down block 321 can continue to move away from the dial 22 after the first protrusion 312 contacts the dial 22. The vertical distance between the first bump 312 and the shifting block 22 is smaller than the vertical distance between the second bump 351 and the shifting block 22, when the driving member 34 drives the first pull rod 31 and the second pull rod 35 to move, the first bump 312 is pressed on the shifting block 22 before the second bump 351, then the driving member 34 continues to drive the first pull rod 31 and the second pull rod 35 to move, so that the first bolt 3211 moves in the through groove 313, and drives the second pull rod 35 to continue to move, so that the second bump 351 is pressed on the shifting block 22, and the shifting block 22 is successively pressed by the first pull rod 31 and the second pull rod 35, thereby preventing unbalanced force on the shifting block when the shifting block 22 is simultaneously pressed by the first pull rod 31 and the second pull rod 35.

In an embodiment, the pull rod assembly 30 further includes a limiting block 36 and a first elastic member 37, the limiting block 36 is fixedly connected to the pull-down block 321, the first pull rod 31 further penetrates through the limiting block 36, and the first elastic member 37 is sleeved on the first pull rod 31. One end of the first elastic element 37 abuts against the pull-down block 321, and the other end abuts against the limiting block 36. When the driving member 34 drives the first connecting rod 33 to move in a direction away from the shifting block 22, the pull-down block 321 is driven to move, and the limiting block 36 is driven to move, so that the limiting block 36 compresses the first elastic member 37, the first protruding block 312 is driven by the elastic force of the first elastic member 37, and the first protruding block 312 is kept pressed on the shifting block 22, thereby preventing the first pull rod 31 and the second pull rod 35 from moving continuously when the driving member 34 drives the first bolt 3211 to move in the through groove 313, and the first protruding block 312 releases the shifting block 22.

In one embodiment, the handle assembly 30 further includes a third handle 38 and a fourth handle 39, and the third handle 38 and the fourth handle 39 are connected to the pull-down block 321. The third tie rod 38 has the same structure as the first tie rod 31, and the fourth tie rod 39 has the same structure as the second tie rod 35. The third tie rod 38 is diagonally arranged with respect to the first tie rod 31, and the fourth tie rod 39 is diagonally arranged with respect to the second tie rod 35. The third pull rod 38 and the first pull rod 31 are pressed on the shifting block 22 before the fourth pull rod 39 and the second pull rod 35. The third pull rod 38 and the first pull rod 31 are pressed on the shifting block 22 before the fourth pull rod 39 and the second pull rod 35, and the spherical convex surface 331 is matched with the spherical concave surface 322a, so that the angle of the first connecting block 32 is adaptively adjusted, the pressing angles of the first pull rod 31, the second pull rod 35, the third pull rod 38 and the fourth pull rod 39 are balanced, the stress of the pressing points of the first pull rod 31, the second pull rod 35, the third pull rod 38 and the fourth pull rod 39, which act on the shifting block 22, is balanced, the stress of the product 200 is balanced, the fixing effect of the product 200 is improved, and the processing quality and the yield of the product 200 are further improved.

It is understood that the number of the pull rods can be adjusted according to the position of the product 200 to be pressed, and one, two, three, five or more pull rods can be provided, which is not limited in the present application.

Taking the pull rod assembly 30 including the first pull rod 31 and the second pull rod 35 as an example, when the fixing device 100 is in use, the through hole 201a of the product 200 passes through the first pull rod 31 and the second pull rod 35 and is placed on the profiling supporting block 142, the shifting block 22 is shifted to move the shifting block 22 away from the first pressing block 21, the second pressing block 23 is placed on the product 200, the first pull rod 31 and the second pull rod 35 pass through the shifting block 22 from the respective corresponding first holes 222, then the shifting block 22 is released, the magnetic member adsorbs the shifting block 22 to reset the shifting block 22, then the driving member 34 drives the first connecting rod 33 to move away from the shifting block 22, the spherical convex surface 331 is matched with the spherical concave surface 322a to adaptively adjust the angles of the first connecting block 32 and the limiting block 36, and drives the first connecting block 32 and the limiting block 36 to move, so that the first protruding block presses the shifting block 22 prior to the second protruding block 351, then the driving member 34 continues to drive the first connecting block 31 and the second pulling block 312 to move, so that the first connecting block 32 and the second connecting block 312 continuously presses the second pressing block 23, and the second pulling block 35 and drives the elastic member 34 to move to press the second pressing block 23, and keep the elastic rod 35 in the elastic pressing block 23 in the elastic state, and press the second pulling rod 34.

The fixing device 100 drives the first pull rod 31 to move towards the direction far away from the pressing component 20 through the driving part 34, so that the spherical concave surface 322a rotates relative to the spherical convex surface 331, and the first connecting block 32 rotates relative to the first connecting rod 33, the first connecting block 32 drives the first pull rod 31 to move, so that the first pull rod 31 can drive the pressing component 20 to press and hold the product 200, thereby not only improving the production efficiency, but also balancing the stress of the product 200, improving the fixing effect of the product 200, and further improving the processing quality and yield of the product 200.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not used as limitations of the present application, and that suitable modifications and variations of the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims (10)

1. A fixture for locating and securing a product location, comprising:

a positioning assembly capable of positioning the product;

the pressing component is arranged on the positioning component and can press and hold the product on the positioning component;

characterized in that, the fixing device further comprises:

the pull rod assembly comprises a first pull rod, a first connecting block, a first connecting rod and a driving piece, wherein one end of the first pull rod is connected with the first connecting block, the other end of the first pull rod can penetrate through the positioning assembly and the pressing assembly, the driving piece is fixedly connected with the positioning assembly, one end of the first connecting rod is connected with the driving piece, the other end of the first connecting rod is connected with the first connecting block, the first connecting rod is provided with a spherical convex surface, the first connecting block is provided with a spherical concave surface, the spherical convex surface is in contact connection with the spherical concave surface, the driving piece drives the first pull rod to move towards the direction away from the pressing assembly, the first connecting block is enabled to rotate relative to the first connecting rod through the spherical convex surface and the spherical concave surface, the first connecting block drives the first pull rod to move, and the first pull rod can drive the pressing assembly to press and hold a product.

2. The fixing device according to claim 1, wherein a first protruding block is disposed at an end of the first pull rod facing away from the first connecting block, the pressing and holding assembly includes a first pressing block and a shifting block, the shifting block is slidably connected to the first pressing block, the shifting block is provided with a first hole and a second hole which are communicated with each other, the diameter of the first hole is larger than that of the second hole, the outer diameter of the first protruding block is larger than that of the second hole and smaller than that of the first hole, the first pull rod passes through the first pressing block and the first hole, and the shifting block slides relative to the first pressing block to enable the first pull rod to pass through the second hole.

3. The fixing device as claimed in claim 2, wherein the first pressing block is provided with a magnetic attraction member, and the magnetic attraction member can attract the shifting block to enable the shifting block to slide relative to the first connecting block.

4. The fixing device as claimed in claim 2, wherein the first pressing block is provided with a chute arranged obliquely, and the shifting block is provided with a convex part which is arranged in the chute in a sliding manner.

5. The fixing device of claim 2, wherein the pull rod assembly further comprises a second pull rod, one end of the second pull rod is connected to the first connecting block, the other end of the second pull rod passes through the pressing assembly and is provided with a second protrusion, a vertical distance from the first protrusion to the pressing assembly is smaller than a vertical distance from the second protrusion to the pressing assembly, and the driving member drives the first pull rod and the second pull rod to move, so that the first protrusion presses on the pressing assembly before the second protrusion presses on the pressing assembly.

6. The fixing device of claim 5, wherein the pull rod assembly further includes a first pin, a through groove is disposed at an end of the first pin facing away from the pressing assembly, the first pin is fixedly connected to the first connecting block, the second pin is fixedly connected to an end of the first pin, the other end of the first pin is movably disposed in the through groove, after the first protrusion presses the pressing assembly first, the first connecting block is driven by the first pin to move, so that the first pin moves in the through groove to drive the second pin to move continuously, and the second protrusion presses the pressing assembly.

7. The fixing device of claim 1, wherein the lever assembly further comprises a limiting block and a first elastic member, the limiting block is connected with the first connecting block, the first pull rod penetrates through the limiting block, the first elastic member is sleeved on the first pull rod, one end of the first elastic member abuts against the first connecting block, and the other end of the first elastic member abuts against the limiting block.

8. The fixing device of claim 5, wherein the lever assembly further comprises a third lever and a fourth lever, the third lever and the fourth lever are connected to the first connecting block, the first lever and the third lever are diagonally arranged, the second lever and the fourth lever are diagonally arranged, and the first lever and the third lever press against the shifting block before the second lever and the fourth lever.

9. The fixing device according to claim 2, wherein the first pressing block is provided with a first guide post and a second guide post, the first guide post and the second guide post are inserted into the shifting block, and the shifting block is slidably connected with the first pressing block relative to the arrangement direction of the first guide post and the second guide post.

10. The fixture of claim 1 wherein the positioning assembly includes a first positioning plate and a second positioning plate, the first positioning plate having a contoured brace, the second positioning plate having a positioning slot, the contoured brace passing through the second positioning plate and being positioned within the positioning slot, the contoured brace capable of supporting an interior surface of the product.

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