Elastic buckling type jig

Abstract

The utility model relates to the technical field of jig fixing, in particular to an elastic buckling type jig. The device comprises a clamping mechanism and a buckling mechanism, the clamping mechanism is in butt joint with the buckling mechanism, the clamping mechanism comprises at least one set of positioning beads and springs, clamping holes are formed in the clamping mechanism, one ends of the springs are fixed, the other ends of the springs abut against the positioning beads, and one ends of the positioning beads protrude in the clamping holes under the elastic force effect of the springs in a normal state. During buckling, the buckling mechanism ejects the positioning bead open and is buckled into the clamping hole, and the positioning bead clamps the buckling mechanism, and during separation, the buckling mechanism ejects the positioning bead open and is pulled out. According to the utility model, through the cooperation of the clamping mechanism and the buckling mechanism in various structural modes, the butt joint between the first cover plate and the second cover plate of the jig has various installation modes, different process requirements can be met, meanwhile, the jig can be conveniently disassembled and assembled, and the jig has very high flexibility and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of fixture fixing, and particularly relates to an elastic snap-type fixture. Background Art

[0002] The applications of Plasma (plasma cleaner) in flexible printed circuit boards (FPCs) mainly include: etching, activation, and cleaning.

[0003] During the cleaning process of FPCs by Plasma, in order to protect the parts that should not be cleaned by plasma (etched or activated), an aluminum alloy plate is used to shield the parts that do not need to be cleaned, and various shaped holes are processed on the aluminum plate to expose the positions of the FPCs that need to be cleaned (etched or activated). Additionally, the characteristics of Plasma having an etching effect can be utilized to enhance the bonding force of the flexible printed circuit board. The surface of the reinforcing plate is micro-etched by plasma to make the surface of the reinforcing plate uneven, so as to increase the surface area of the reinforcing plate.

[0004] Due to the requirements of the above processes, when processing FPC boards by plasma, an opening and closing fixture is used to manually clamp or open the FPC board repeatedly. The common fixtures in the current working mode include spring clip type, magnetic attraction type, hinge type, and manual knob clamping type.

[0005] Traditional opening and closing fixtures or slot fixtures, including spring clip type, magnetic attraction fixtures, and hinge opening and closing structure fixtures, etc., generally have some problems.

[0006] During the use of the spring clip type fixture, it is a sliding friction, which will cause damage to the top ball and the spring clip and generate dust. At the same time, the material of the spring clip is prone to failure in the Plasma plasma cavity, and it cannot ensure long-term elasticity. The elastic failure speed is also very fast.

[0007] The magnetic fixture has a permanent magnetism, and the permanent magnetic attraction has a great impact on the FPC process circuit. If used improperly or the environmental factors are poor, it may cause circuit damage or process defects.

[0008] During the use of the hinge opening and closing fixture, there are also problems of structural sliding friction. Long-term use will cause the hinge mechanism to age and damage, affecting the normal use and service life of the fixture. In addition, dust will also be generated, which is not conducive to the cleanliness of the production environment.

[0009] The manual knob clamping fixture mechanism is not suitable for rapid automation, and in the case of randomly changing angles, it is prone to misoperation, resulting in product damage. In addition, the protruding part of the knob also affects the stacking of the fixtures, which may affect the production efficiency and product quality. These problems have restricted the further development and application of the existing technology. Summary of the Utility Model

[0010] The utility model provides an elastic snap - type jig, aiming to solve the technical problems existing in traditional opening - closing jigs or slot jigs.

[0011] The utility model provides an elastic snap - type jig, including a clamping mechanism and a snap - locking mechanism. The clamping mechanism is docked with the snap - locking mechanism. The clamping mechanism includes at least one set of positioning beads and springs. A clamping hole is provided inside the clamping mechanism. One end of the spring is fixed and the other end abuts against the positioning bead. Under normal conditions, one end of the positioning bead protrudes into the clamping hole under the elastic force of the spring. When snapped, the snap - locking mechanism pushes open the positioning bead and snaps into the clamping hole, and the positioning bead catches the snap - locking mechanism. When disengaging, the snap - locking mechanism pushes open the positioning bead and pulls out.

[0012] As a further improvement of the utility model, the clamping mechanism further includes a positioning pressure block and a positioning bottom plate. The positioning bottom plate is provided with a clamping hole and at least one first card slot. The first card slot is located around the clamping hole. The positioning pressure block is provided with at least one second card slot and a pressure - block through - hole. The positioning pressure block is connected to the positioning bottom plate. The pressure - block through - hole is aligned with the clamping hole. One second card slot is docked with one first card slot to form a positioning cavity, and the clamping mechanism is installed in the positioning cavity.

[0013] As a further improvement of the utility model, the first card slot and the second card slot gradually converge at positions close to the clamping hole and the pressure - block through - hole to form a card - slot necking. The aperture of the card - slot necking is smaller than the spherical diameter of the positioning bead. The positioning bead and the spring are arranged in the positioning cavity. One end of the spring abuts against the positioning cavity, and the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the card - slot necking.

[0014] As a further improvement of the utility model, the clamping mechanism further includes a clamping mounting seat. A mounting - seat through - hole is provided in the middle of the clamping mounting seat. At least one positioning cavity is provided inside the clamping mounting seat, and the clamping mechanism is installed in the positioning cavity.

[0015] As a further improvement of the utility model, the positioning bead and the spring are arranged in the positioning cavity. The front part of the positioning cavity is provided with a gradually converging positioning - cavity necking. The positioning - cavity necking communicates with the mounting - seat through - hole. The aperture of the positioning - cavity necking is smaller than the spherical diameter of the positioning bead. One end of the spring abuts against the rear part of the positioning cavity, and the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the positioning - cavity necking.

[0016] As a further improvement of the utility model, the elastic snap - type jig further includes a mounting - seat plug. The mounting - seat plug is detachably connected to the rear part of the positioning cavity, and one end of the spring abuts against the mounting - seat plug.

[0017] As a further improvement of the present utility model, the clamping mechanism further includes a positioning base plate, the positioning base plate is provided with a mounting seat groove, the outer shape of the mounting seat groove matches the outer shape of the clamping mounting seat, the clamping mounting seat is detachably connected in the mounting seat groove, and the clamping holes are arranged in the mounting seat groove.

[0018] As a further improvement of the present utility model, the outer shape of the clamping mounting seat is circular or polygonal.

[0019] As a further improvement of the present utility model, the clamping mechanism further includes a positioning outer cylinder, the positioning beads and the spring are arranged in the positioning outer cylinder, the front part of the positioning outer cylinder is provided with a wrapped edge, the wrapped edge gradually converges outward along the front part of the positioning outer cylinder to form a positioning hole, the aperture of the positioning hole is smaller than the ball diameter of the positioning bead, one end of the spring abuts against the rear part of the positioning outer cylinder, the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the positioning hole, the positioning outer cylinder is connected in the positioning cavity, and the positioning hole of the positioning outer cylinder faces the clamping hole.

[0020] As a further improvement of the present utility model, the buckle mechanism includes a buckle seat and a fastening head, the fastening head is connected to the buckle seat and protrudes from the buckle seat, and the fastening head is docked with the clamping hole; a concave fastening concave ring is arranged on the middle side of the fastening head, and after the fastening head is docked with the clamping hole, the positioning bead is clamped into the fastening concave ring.

[0021] The beneficial effects of the present utility model are as follows: Through the cooperation of the clamping mechanism and the buckle mechanism in various structural forms, there are multiple installation methods for the docking between the first cover plate and the second cover plate of the jig, which can meet different process requirements. At the same time, it can be disassembled and assembled conveniently, and has high flexibility and practicability. Description of the Drawings

[0022] Figure 1 is a structural diagram of the connection between the clamping mechanism and the first cover plate in the integrated installation method of the elastic snap-fit jig of the present utility model;

[0023] Figure 2 is a structural diagram of the first cover plate in the integrated installation method of the elastic snap-fit jig of the present utility model;

[0024] Figure 3 is Figure 2 the enlarged structural view of area A in

[0025] Figure 4 is the overall structural diagram of the clamping mechanism in the integrated installation method of the elastic snap-fit jig of the present utility model;

[0026] Figure 5 is the structural sectional view of the clamping mechanism in the integrated installation method of the elastic snap-fit jig of the present utility model;

[0027] Figure 6 It is a structural diagram of the positioning pressing block in the integral installation method of the elastic snap-type fixture of the present utility model;

[0028] Figure 7 It is a structural diagram of the connection between the clamping mechanism and the first cover plate in the independent installation method of the elastic snap-type fixture of the present utility model;

[0029] Figure 8 It is a structural diagram of the first cover plate in the independent installation method of the elastic snap-type fixture of the present utility model;

[0030] Figure 9 It is Figure 8 The enlarged structural diagram of area B in

[0031] Figure 10 It is a structural diagram of the clamping mechanism in the independent installation method of the elastic snap-type fixture of the present utility model;

[0032] Figure 11 It is a structural diagram of the connection between the buckle mechanism and the second cover plate in the present utility model;

[0033] Figure 12 It is a structural diagram of the second cover plate in the present utility model;

[0034] Figure 13 It is Figure 12 The enlarged structural diagram of area C in

[0035] Figure 14 It is a structural diagram of the buckle mechanism in the present utility model;

[0036] Figure 15 It is a structural cross-sectional view of the clamping connection between the fastening head and the clamping mechanism in the present utility model. Specific embodiments

[0037] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments.

[0038] In the manufacturing process of flexible printed circuit boards (FPCs), according to the process requirements, when using technologies such as plasma cleaning, etching, and activation, aluminum plates (the first cover plate 1 and the second cover plate 2) are required as protective casings. Since the aluminum plates need to be frequently opened and closed, quickly clamped or opened during the process, the present utility model provides a new type of fixture. This fixture uses steel balls with springs 32 to make the steel balls elastic, so as to effectively press and fasten the aluminum plates.

[0039] Figures 1 to 15As shown, an elastic snap-fit ​​fixture of the utility model includes a clamping mechanism 3 and a snap-fit ​​mechanism 4. The clamping mechanism 3 is connected to the snap-fit ​​mechanism 4. The clamping mechanism 3 includes at least one group of positioning beads 31 and a spring 32. The clamping mechanism 3 is provided with a snap-fit ​​hole 11. One end of the spring 32 is fixed and the other end abuts against the positioning bead 31. In a normal state, one end of the positioning bead 31 protrudes into the snap-fit ​​hole 11 under the elastic force of the spring 32. When snapping, the snap-fit ​​mechanism 4 squeezes the positioning bead 31 and snaps into the snap-fit ​​hole 11, and the positioning bead 31 clamps the snap-fit ​​mechanism 4. When disengaging, the snap-fit ​​mechanism 4 pushes the positioning bead 31 open and pulls it out.

[0040] The elastic buckle-type fixture also includes a first cover plate 1 and a second cover plate 2. The first cover plate 1 is connected to at least one clamping mechanism 3, and the second cover plate 2 is connected to at least one buckle mechanism 4.

[0041] The first cover plate 1 and the second cover plate 2 are preferably aluminum plates, the first cover plate 1 is a mechanism for placing the FPC board, and the second cover plate 2 is a mechanism for covering the FPC board. The positioning beads 31 are preferably steel beads.

[0042] The jig is mainly composed of a steel ball spring 32 clamping mechanism 3, a snap mechanism 4, a jig upper cover plate (first cover plate 1) and a jig lower cover plate (second cover plate 2). The plate is clamped by the cooperation of these mechanisms. The spring 32 steel ball elastic repeating quick clamping mechanism 3 is used to clamp the jig mechanism. It is mainly composed of a mounting mechanism, a spring 32 and a steel ball. When the jig is clamped, the snap mechanism 4 presses against the steel ball, the spring 32 contracts, and the steel ball spring 32 is clamped into the snap mechanism 4.

[0043] Specifically, the jig for protecting the FPC is composed of two aluminum plates, one of which is equipped with a plurality of snap mechanisms 4 containing fastening heads 42, and the other aluminum plate is equipped with a corresponding plurality of clamping mechanisms 3 containing elastic steel balls. When the jig is in operation, the FPC board is placed on the second cover plate 2, and the first cover plate 1 is placed on the second cover plate 2 to clamp the FPC board. When the fastening head 42 is pushed toward the steel ball by an external force, the spring 32 will automatically give way and give elastic force to the steel ball, so that the two aluminum plates are effectively pressed and fastened. When the fastening head 42 is pulled outward by an external force, the spring 32 will automatically give way under the action of the elastic force, and the fastening head 42 will be free from the pressure of the steel ball.

[0044] like Figures 11 to 15 As shown, the buckle mechanism 4 includes a buckle seat 41 and a fastening head 42. A buckle groove 21 is provided on the second cover plate 2 at the position of each buckle mechanism 4. The buckle seat 41 is fastened to the buckle groove 21. The fastening head 42 is connected to the buckle seat 41 and protrudes from the buckle seat 41. The fastening head 42 is docked with the snap-on hole 11. An inwardly concave fastening groove 43 is provided on the side of the middle part of the fastening head 42. After the fastening head 42 is docked with the snap-on hole 11, the positioning bead 31 is snapped into the fastening groove 43.

[0045] The buckle mechanism 4 is a mechanism for clamping the jig. The buckle seat 41 and the buckle groove 21 of the second cover plate 2 can be detachably connected and fixed by screws, so that the buckle head 42 is installed on the second cover plate 2. After assembly, the buckle head 42 will protrude from the surface of the second cover plate 2, so that the buckle head 42 can be easily docked with the buckle hole 11 of the first cover plate 1. The buckle concave ring 43 on the buckle head 42 can clamp the positioning bead 31 spring 32 to prevent the buckle head 42 from falling off easily.

[0046] The structure of this utility model can include a variety of installation methods of steel balls and springs 32. These include making the steel balls and springs 32 into an independent integral structure; or gradually installing the steel balls and springs 32 on the holes of the aluminum plate; and the steel ball spring 32 clamping mechanism 3 can be disassembled separately, and the number of steel balls and springs 32 in the steel ball spring 32 buckle can be changed, from a single steel ball spring 32 pressing the buckle head 42 to two, three, four or more springs 32 pressing combinations. The utility model is further illustrated by the following five embodiments.

[0047] Embodiment 1:

[0048] like Figures 1 to 3 , Figure 6 As shown, the clamping mechanism 3 also includes a positioning block 5 and a positioning base plate. The positioning base plate is provided with a snap-in hole 11 and at least one first snap-in groove 12. The first snap-in groove 12 is located around the snap-in hole 11. The positioning block 5 is provided with at least one second snap-in groove 52 and a block through hole 51. The positioning block 5 is connected to the positioning base plate. The block through hole 51 is aligned with the snap-in hole 11. A second snap-in groove 52 is connected to a first snap-in groove 12 to form a positioning cavity 6. The clamping mechanism 3 is installed in the positioning cavity 6.

[0049] The positioning base plate may be provided with a pressing block groove 14, and the first clamping groove 12 is arranged in the pressing block groove 14. The positioning base plate is integrally formed with the first cover plate 1, and the positioning base plate may be a position on the first cover plate 1 for assembling the clamping mechanism 3.

[0050] The positioning block 5 is used to compress the clamping mechanism 3 composed of the steel ball spring 32, which facilitates the installation of the clamping mechanism 3 on the first cover plate 1. The positioning block 5 and the first cover plate 1 are both provided with threaded holes at corresponding positions, and the two are fixedly connected by screws, which is convenient for installation and removal. The block through hole 51 is aligned with the clamping hole 11 to form a hole position for the fastening head 42 to be inserted.

[0051] The first card slot 12 and the second card slot 52 are gradually closed at the position close to the card connection hole 11 and the pressure block through hole 51 to form a card slot opening (not shown in the figure). The aperture of the card slot opening is smaller than the ball diameter of the positioning bead 31. The positioning bead 31 and the spring 32 are arranged in the positioning cavity 6. One end of the spring 32 abuts against the positioning cavity 6, and the other end of the spring 32 abuts against the positioning bead 31 and makes one end of the positioning bead 31 protrude from the card slot opening.

[0052] In this embodiment, the positioning beads 31 and the springs 32 are installed independently, and the positioning beads 31 and the springs 32 are installed on the first cover plate 1 step by step. Specifically, the spring 32 and the positioning bead 31 can be directly installed in the positioning cavity 6 formed by the first slot 12 and the second slot 52. During assembly, the spring 32 is first placed in the first slot 12, and the positioning bead 31 is inserted to compress the spring 32 and one side of the positioning bead 31 is pressed against the slot end of the first slot 12. Then, the positioning pressure block 5 is covered to align the second slot 52 with the first slot 12 and fix it, thereby limiting the positioning bead 31 and the spring 32 in the positioning cavity 6. Under normal conditions, the spring 32 presses the positioning bead 31 so that one side of the positioning bead 31 protrudes from the slot end. When the fastening head 42 is inserted, the positioning bead 31 will automatically move aside under the elastic force of the spring 32. When the fastening head 42 is fully inserted, the fastening recessed ring 43 is aligned with the position of the positioning bead 31. At this time, the positioning bead 31 is pushed out and stuck in the fastening recessed ring 43 under the action of the spring 32, so that the fastening head 42 is fixed and will not fall off. Each positioning cavity 6 may be provided with a plurality of positioning beads 31 matched with springs 32 .

[0053] Embodiment 2:

[0054] like Figures 1 to 6 As shown, the clamping mechanism 3 also includes a positioning block 5 and a positioning base plate. The positioning base plate is provided with a snap-in hole 11 and at least one first snap-in groove 12. The first snap-in groove 12 is located around the snap-in hole 11. The positioning block 5 is provided with at least one second snap-in groove 52 and a block through hole 51. The positioning block 5 is connected to the positioning base plate. The block through hole 51 is aligned with the snap-in hole 11. A second snap-in groove 52 is connected to a first snap-in groove 12 to form a positioning cavity 6. The clamping mechanism 3 is installed in the positioning cavity 6.

[0055] The positioning base plate may be provided with a pressing block groove 14, and the first clamping groove 12 is arranged in the pressing block groove 14. The positioning base plate is integrally formed with the first cover plate 1, and the positioning base plate may be a position on the first cover plate 1 for assembling the clamping mechanism 3.

[0056] The clamping mechanism 3 further includes a positioning outer cylinder 33. The positioning ball 31 and the spring 32 are arranged inside the positioning outer cylinder 33. A wrapped edge 34 is provided at the front part of the positioning outer cylinder 33. The wrapped edge 34 gradually converges outward along the front part of the positioning outer cylinder 33 to form a positioning hole. The aperture of the positioning hole is smaller than the spherical diameter of the positioning ball 31. One end of the spring 32 abuts against the rear part of the positioning outer cylinder 33, and the other end of the spring 32 abuts against the positioning ball 31 and makes one end of the positioning ball 31 protrude from the positioning hole. The positioning outer cylinder 33 is connected inside the positioning cavity 6, and the positioning hole of the positioning outer cylinder 33 faces the clamping hole 11.

[0057] The clamping mechanism 3 of the steel ball spring 32 can be made into an integral independent small mechanism, which is a mechanism for clamping the fastening head 42. The whole integral independent small mechanism is composed of a positioning ball 31, a spring 32, and a positioning outer cylinder 33. In the normal state, the spring 32 holds the positioning ball 31 so that one side of the positioning ball 31 protrudes from the wrapped edge 34. When the jig is clamped, the fastening head 42 abuts against the positioning ball 31, the spring 32 contracts. When the fastening concave ring 43 is aligned with the position of the positioning ball 31, the positioning ball 31 is clamped into the fastening concave ring 43 under the action of the spring 32.

[0058] At the position corresponding to each clamping mechanism 3 on the first cover plate 1, a plurality of first clamping grooves 12 can be provided. The plurality of first clamping grooves 12 can be evenly distributed around the clamping hole 11. Each first clamping groove 12 is equipped with a clamping mechanism 3 of an integral steel ball spring 32 and is fixed on the first cover plate 1 by using the positioning pressing block 5. A structure form with a plurality of positioning balls 31 and springs 32 can also be configured inside each clamping mechanism 3 of the integral steel ball spring 32.

[0059] Embodiment Three:

[0060] As Figures 7 to 10 shown, the clamping mechanism 3 further includes a clamping mounting seat 7. The clamping mounting seat 7 is connected to the first cover plate 1. An installation seat through hole 71 is provided in the middle of the clamping mounting seat 7. The installation seat through hole 71 is aligned with the clamping hole 11. At least one positioning cavity 6 is provided inside the clamping mounting seat 7, and the clamping mechanism 3 is installed inside the positioning cavity 6.

[0061] The positioning ball 31 and the spring 32 are arranged inside the positioning cavity 6. A gradually converging positioning cavity closing opening is provided at the front part of the positioning cavity 6. The positioning cavity closing opening communicates with the installation seat through hole 71. The aperture of the positioning cavity closing opening is smaller than the spherical diameter of the positioning ball 31. One end of the spring 32 abuts against the rear part of the positioning cavity 6, and the other end of the spring 32 abuts against the positioning ball 31 and makes one end of the positioning ball 31 protrude from the positioning cavity closing opening.

[0062] In this embodiment, the positioning beads 31 and the springs 32 are installed independently. The positioning beads 31 and the springs 32 are gradually installed on the first cover plate 1 respectively. Specifically, the positioning beads 31 and the springs 32 are directly assembled into the positioning cavity 6 of the clamping mounting seat 7. After assembly, the positioning beads 31 will protrude from the mouth of the positioning cavity under the action of the elastic force of the springs 32. When the jig is clamped, the fastening head 42 presses against the positioning beads 31, and the springs 32 contract to make the positioning beads 31 automatically give way. When the fastening concave ring 43 is aligned with the position of the positioning beads 31, the positioning beads 31 are snapped into the fastening concave ring 43 under the action of the springs 32 to complete the snap fixation.

[0063] The elastic fastening type jig further includes a mounting seat plug 8. The mounting seat plug 8 is detachably connected to the rear part of the positioning cavity 6. One end of the spring 32 abuts against the mounting seat plug 8. In order to facilitate the installation of the spring 32 and the positioning beads 31 in the positioning cavity 6, an assembly opening is provided at the rear part of the positioning cavity 6. After the positioning beads 31 and the springs 32 are sequentially inserted into the positioning cavity 6 through the assembly opening, the mounting seat plug 8 is fixed to the rear part of the positioning cavity 6 by the threaded connection between the mounting seat plug 8 and the clamping mounting seat 7, and at the same time, the spring 32 is compressed so that the positioning beads 31 are subjected to a certain elastic force.

[0064] Embodiment Four:

[0065] Combined with Figures 4 to 5 、 Figures 7 to 10 As shown in

[0066] The elastic fastening type jig further includes a clamping mounting seat 7. The clamping mounting seat 7 is connected to the first cover plate 1. An installation seat through hole 71 is provided in the middle of the clamping mounting seat 7. The installation seat through hole 71 is aligned with the clamping hole 11. At least one positioning cavity 6 is provided inside the clamping mounting seat 7. The clamping mechanism 3 is installed in the positioning cavity 6.

[0067] In this embodiment, first, the positioning beads 31, the springs 32, and the positioning outer cylinder 33 are made into an integrated independent small mechanism, and then the independent small mechanism is assembled into the positioning cavity 6 of the clamping mounting seat 7. A plurality of positioning cavities 6 are evenly arranged around the installation seat through hole 71 in the clamping mounting seat 7. An independent small mechanism is assembled in each positioning cavity 6. After assembly, the clamping mounting seat 7 is assembled onto the first cover plate 1 as an independent large mechanism.

[0068] When the fixture is clamped, the fastening head 42 is snapped into the through hole 71 of the mounting seat and the clamping hole 11. The fastening head 42 presses against the positioning bead 31 in the positioning outer cylinder 33, causing the spring 32 to contract and the positioning bead 31 to automatically give way. When the fastening concave ring 43 aligns with the position of the positioning bead 31, the positioning bead 31 is snapped into the fastening concave ring 43 under the action of the spring 32 to complete the snap fixation.

[0069] Embodiment Five:

[0070] Based on the clamping mounting seat 7 of Embodiments Three and Four, the clamping mechanism 3 further includes a positioning bottom plate. The positioning bottom plate is provided with a mounting seat groove 13. The outer shape of the mounting seat groove 13 matches the outer shape of the clamping mounting seat 7. The clamping mounting seat 7 is detachably connected within the mounting seat groove 13, and the clamping hole 11 is provided within the mounting seat groove 13. Threaded holes are provided at corresponding positions of the clamping mounting seat 7 and the mounting seat groove 13, and the two can be fixedly connected by screws, facilitating installation and disassembly. The positioning bottom plate is integrally formed with the first cover plate 1. The positioning bottom plate can be a position on the first cover plate 1 for assembling the clamping mechanism 3.

[0071] The outer shape of the clamping mounting seat 7 is circular or polygonal. The polygon can adopt a square structure as shown in the figure. The outer shape of the clamping mounting seat 7 of any shape can be adjusted according to actual needs, and only the mounting seat groove 13 needs to be designed into a matching shape accordingly, providing more type options for assembly.

[0072] The elastic snap-fit type fixture of the present utility model realizes rapid clamping and repeated loosening or tightening through the combination of the steel ball spring 32, and maintains the elastic force and clamping degree for a long time. The steel ball spring 32 snap provided in the present utility model allows the number of internal steel ball springs 32 to increase from 1 to n. This design enables the fixture to adapt to a wider range of application scenarios, improving the versatility and flexibility of the fixture. The clamping mechanism 3 can be disassembled separately or assembled dispersedly. This design makes the use of the clamping mechanism 3 more flexible, and it can be disassembled or assembled according to actual needs, improving the convenience of use. The design that the spring 32 positioning bead 31 can be of various outer shapes expands the application range of the spring 32 positioning bead 31, and it can adapt to springs 32 of different shapes and specifications, further improving the versatility and adaptability of the product.

[0073] This elastic snap-fit type fixture has the following advantages:

[0074] 1) Environmentally friendly and dust-free: This fixture uses the snap mechanism 4 of steel balls plus the spring 32. The steel balls generate rolling friction with the fastening head 42 to be clamped, and no dust will be generated. In addition, the steel balls are hardened by special steel, are not easily worn, improve the service life, and also ensure the cleanliness of the environment.

[0075] 2) The spring 32 is made of excellent material: The material of the spring 32 is specially treated according to the corrosion environment formed in the high-temperature vacuum chamber of the Plasma (plasma cleaner) to ensure that the metal crystal phase remains unchanged for a long time and the elastic force remains effective for a long time. This material selection not only ensures the performance of the spring 32 but also improves its corrosion resistance.

[0076] 3) The elastic force is persistent: The structure of the steel ball plus the spring 32 wire can ensure that the elastic force remains effective for a long time, avoiding the problem of insufficient clamping force caused by the deformation or failure of the spring 32.

[0077] 4) The clamping force is adjustable: The length of the spring 32 can be freely selected according to the process requirements. The elastic force of the spring 32 can be controlled in advance by selecting the length of the spring 32 or the thickness of the spring wire, as well as adjusting the tightness of the screw. This is very useful in some occasions that require precise control.

[0078] 5) The structure is compact and convenient for replacement: The independent installation type has a small and compact structure, which is convenient for quick replacement on the large board. This feature has significant advantages in the process flow that requires frequent replacement of fixtures.

[0079] 6) The appearance is diverse: The independent installation type can not only be common shapes such as square, round or polygonal, but also the length of the spring 32 can be freely selected according to needs, which means it can adapt to a variety of different process requirements.

[0080] 7) Strong flexibility: The number of steel ball springs 32 in the steel ball spring 32 buckle can be increased from 1 to n, and a variety of clamping methods can be selected (tight pressing type, screw fixing type), which further enhances the flexibility of the present utility model and can meet more types of process requirements.

[0081] In summary, the present utility model has significant advantages over the prior art in terms of environmental protection, the material of the spring 32, the persistence of the elastic force, the adjustment of the clamping force, the compactness of the structure, the diversity of the appearance, and the flexibility.

[0082] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, which should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. An elastic snap-fit ​​fixture, characterized in that: It includes a clamping mechanism and a snap mechanism. The clamping mechanism is connected to the snap mechanism. The clamping mechanism includes at least one group of positioning beads and a spring. A snap hole is provided in the clamping mechanism. One end of the spring is fixed and the other end abuts the positioning bead. Under normal conditions, one end of the positioning bead protrudes into the snap hole under the action of the spring elastic force. When fastened, the snap mechanism pushes the positioning bead open and buckles it into the snap hole, and the positioning bead clamps the snap mechanism. When disengaged, the snap mechanism pushes the positioning bead open and pulls it out.

2. The elastic snap-fit ​​fixture according to claim 1, characterized in that: The clamping mechanism also includes a positioning block and a positioning base plate. The positioning base plate is provided with a snap-in hole and at least one first snap-in groove. The first snap-in groove is located around the snap-in hole. The positioning block is provided with at least one second snap-in groove and a block through hole. The positioning block is connected to the positioning base plate. The block through hole is aligned with the snap-in hole. One of the second snap-in grooves is connected to one of the first snap-in grooves to form a positioning cavity. The clamping mechanism is installed in the positioning cavity.

3. The elastic snap-fit ​​fixture according to claim 2, characterized in that: The first and second card slots are gradually closed at positions near the card connection hole and the pressure block through hole to form a card slot opening, the aperture of the card slot opening is smaller than the ball diameter of the positioning bead, the positioning bead and the spring are arranged in the positioning cavity, one end of the spring abuts against the positioning cavity, and the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the card slot opening.

4. The elastic snap-fit ​​fixture according to claim 1, characterized in that: The clamping mechanism also includes a clamping mounting seat, a mounting seat through hole is provided in the middle of the clamping mounting seat, at least one positioning cavity is provided inside the clamping mounting seat, and the clamping mechanism is installed in the positioning cavity.

5. The elastic snap-fit ​​fixture according to claim 4, characterized in that: The positioning bead and the spring are arranged in the positioning cavity. The front part of the positioning cavity is provided with a gradually closing positioning cavity opening, the positioning cavity opening is connected to the through hole of the mounting seat, the aperture of the positioning cavity opening is smaller than the ball diameter of the positioning bead, one end of the spring abuts against the rear part of the positioning cavity, and the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the positioning cavity opening.

6. The elastic snap-fit ​​fixture according to claim 5, characterized in that: It also includes a mounting seat plug, which is detachably connected to the rear part of the positioning cavity, and one end of the spring abuts against the mounting seat plug.

7. The elastic snap-fit ​​fixture according to claim 4, characterized in that: The clamping mechanism also includes a positioning base plate, which is provided with a mounting seat groove. The shape of the mounting seat groove matches the shape of the clamping mounting seat. The clamping mounting seat is detachably connected to the mounting seat groove, and the clamping hole is arranged in the mounting seat groove.

8. The elastic snap-fit ​​fixture according to claim 7, characterized in that: The clamping mounting seat has a circular or polygonal shape.

9. The elastic snap-fit ​​fixture according to any one of claims 2, 4, 7 and 8, characterized in that: The clamping mechanism also includes a positioning outer cylinder, the positioning bead and the spring are arranged in the positioning outer cylinder, the front part of the positioning outer cylinder is provided with a rim, the rim gradually converges outward along the front part of the positioning outer cylinder to form a positioning hole, the hole diameter of the positioning hole is smaller than the ball diameter of the positioning bead, one end of the spring abuts against the rear part of the positioning outer cylinder, the other end of the spring abuts against the positioning bead and makes one end of the positioning bead protrude from the positioning hole, the positioning outer cylinder is connected in the positioning cavity, and the positioning hole of the positioning outer cylinder faces the clamping hole.

10. The elastic snap-fit ​​fixture according to claim 1, characterized in that: The buckle mechanism includes a buckle seat and a fastening head, wherein the fastening head is connected to the buckle seat and protrudes from the buckle seat, and the fastening head is docked with the buckling hole; an inwardly concave fastening ring is provided on the side of the middle part of the fastening head, and after the fastening head is docked with the buckling hole, the positioning bead is snapped into the fastening ring.

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