CN113068329B

CN113068329B - Microphone pressure maintaining jig for Internet of things equipment and using method thereof

Info

Publication number: CN113068329B
Application number: CN202110221834.5A
Authority: CN
Inventors: 欧文灏; 徐思通; 鲁伟; 赵阳; 李文科
Original assignee: Shenzhen Panfeng Precision Technology Co Ltd
Current assignee: Shenzhen Panfeng Precision Technology Co Ltd
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2022-03-29
Anticipated expiration: 2041-02-27
Also published as: CN113068329A

Abstract

The invention belongs to the technical field of surface mounting technology, in particular to a microphone pressure maintaining jig for Internet of things equipment and a using method thereof, wherein the microphone pressure maintaining jig comprises an upper pressing plate and a lower pressing plate; a group of pressing grooves are formed in the positions, corresponding to the upper pressing plate and the lower pressing plate, of the upper pressing plate; the upper pressure plate and the lower pressure plate are subjected to pressure maintaining through a pressure maintaining piece; notches are formed in the side walls of the two sides of the lower pressing plate; the pressure maintaining piece comprises a clamping rod and a clamping groove; clamping rods are fixedly connected to the periphery of the lower pressing plate; the invention provides a microphone pressure maintaining jig for Internet of things equipment and a using method thereof, and aims to solve the problems that in the prior art, when a PCB is subjected to pressure maintaining, the pressure maintaining is generally carried out through screws or rotating blocks, so that the pressure is not standard, the pressure is changed, no uniform pressure value exists, and when the pressure maintaining is carried out through the screws and the rotating blocks, the pressure needs to be sequentially rotated and pressed upwards, so that the pressure is unbalanced, the sealing performance of the PCB is poor, and the microphone is easy to break.

Description

Microphone pressure maintaining jig for Internet of things equipment and using method thereof

Technical Field

The invention belongs to the technical field of surface mounting, and particularly relates to a microphone pressure maintaining jig for Internet of things equipment and a using method thereof.

Background

The internet of things is that any object or process needing monitoring, connection and interaction is collected in real time through various devices and technologies such as various information sensors, radio frequency identification technologies, global positioning systems, infrared sensors, laser scanners and the like, various required information such as sound, light, heat, electricity, mechanics, chemistry, biology, positions and the like is collected, ubiquitous connection of objects and objects, and ubiquitous connection of objects and people are realized through various possible network accesses, and intelligent sensing, identification and management of the objects and the processes are realized.

When the standard multilayer PCB stacked MEMS microphone is produced, solder paste is printed on the surface of each layer of PCB, the PCB is arranged in a pressure maintaining and pressing jig, and then the solder paste is melted, combined and solidified through reflow soldering at 260 ℃ high temperature after being locked by bolts, so that the PCB and the PCB are connected in a seamless mode.

Some technical solutions related to surface mount technology also appear in the prior art, for example, a chinese patent with application number 2017200390961 discloses a lamination jig for MEMS microphone, including tool top board and tool bottom board that mutually support and are used for pressfitting PCB board, the tool top board with lock through the screw between the tool bottom board, its characterized in that: the lower end of the jig upper pressing plate, the PCB above corresponding to the uppermost layer, the upper end of the jig lower pressing plate and the PCB below corresponding to the lowermost layer are respectively provided with a pressing layer, and the pressing layer is a glass fiber cloth layer.

Some technical solutions related to surface mounting technology also appear in the prior art, for example, a chinese patent with application number 2017102367216 discloses a press-fit jig for an MEMS microphone, which includes a jig upper press plate and a jig lower press plate, a lock catch is arranged around the jig upper press plate, a lock hole is arranged on the jig lower press plate corresponding to the lock catch, the lock catch respectively passes through the lock hole to lock the jig upper press plate on the jig lower press plate, the lock catch includes a lock rod, a rotary shifting block is arranged at the upper end of the lock rod, a spring is sleeved on the lock rod, a rotary lock block is arranged at the lower end of the lock rod, the lower surface of the jig lower press plate, the rear side that corresponds the lockhole is equipped with the locking groove, and after rotatory locking piece passed the lockhole, rotatory shifting block made the both ends of rotatory locking piece avoid the lockhole, and the both ends of spring offset with the upper surface of rotatory shifting block and tool holding down plate respectively makes rotatory locking piece card dress in the locking groove.

In the prior art, when the PCB is subjected to pressure maintaining in a pressing mode, the pressure is not standard pressure and is changed without a uniform pressure value due to the fact that the PCB is generally subjected to pressure maintaining in the pressing mode through a screw or a rotating block, pressure is unbalanced due to the fact that the pressure is required to be sequentially pressed in the rotating mode when the pressure maintaining is carried out through the screw and the rotating block, the sealing performance of the PCB is poor, and a microphone is prone to being broken.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that in the prior art, when a PCB is subjected to pressure maintaining in a pressing mode, the pressure is not standard pressure due to the fact that the pressure is changed and does not have a uniform pressure value due to the fact that the PCB is subjected to pressure maintaining in a pressing mode through a screw or a rotating block, pressure imbalance is caused due to the fact that the pressure is required to be sequentially pressed in a rotating mode when the pressure maintaining is carried out through the screw and the rotating block, the sealing performance of the PCB is poor, and the microphone is prone to being broken.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a microphone pressure maintaining jig for Internet of things equipment and a using method thereof, wherein the microphone pressure maintaining jig comprises an upper pressing plate and a lower pressing plate; a group of pressing grooves are formed in the positions, corresponding to the upper pressing plate and the lower pressing plate, of the upper pressing plate; the upper pressure plate and the lower pressure plate are subjected to pressure maintaining through a pressure maintaining piece; notches are formed in the side walls of the two sides of the lower pressing plate; the pressure maintaining piece comprises a clamping rod and a clamping groove; clamping rods are fixedly connected to the periphery of the lower pressing plate; a clamping groove is formed in the position, opposite to the clamping rod, of the upper pressing plate; a pair of first cavities which are symmetrically distributed is formed in the clamping rod; the inner wall of the first cavity is hermetically and slidably connected with a first push plate, and the first push plate is fixedly connected to the side wall of the first cavity through a first spring; a clamping block is fixedly connected to the side wall, close to the outer side wall of the clamping rod, of the first push plate; the clamping block penetrates through the first cavity and extends out of the clamping rod, a sealing ring is arranged at the penetrating point, and the sealing ring is fixedly connected to the side wall of the first cavity; a constant pressure groove is formed in the side wall of the clamping groove; an air bag is fixedly connected to the bottom of the notch groove; the air bag and the first cavity are communicated with each other; when the microphone is used, in the prior art, when the PCB is subjected to pressure maintaining, generally, the pressure maintaining is carried out through screws or rotating blocks, so that the pressure is not standard pressure, the pressure is changed, no uniform pressure value exists, and the pressure is unbalanced due to the fact that the screws and the rotating blocks are required to be sequentially subjected to rotating and pressing during the pressure maintaining, so that the tightness of the PCB is poor, and the microphone is easy to break; the pressure maintaining piece is used for maintaining the pressure of the upper pressure plate and the lower pressure plate, in the pressing process, the air bag is pressed, air in the air bag enters the first cavity to push the first push plate to move inwards, the clamping block is driven to contract towards the first cavity at the same time, after the clamping block on the clamping rod enters the clamping groove, the air bag is released, the clamping block can be attached to the inner wall of the clamping groove, after the clamping block reaches the position of the constant pressure groove, the clamping block is pushed to be clamped into the constant pressure groove under the action of the elastic force of the first spring, at the moment, the distance between the upper pressure plate and the lower pressure plate is constant, the pressure maintaining force applied by the pressure maintaining piece is in a constant value state, the pressure maintaining piece is clamped for maintaining the pressure, the assembly is rapid and simple, and the production efficiency can be improved.

Preferably, the section of the end part of the clamping block, which is far away from the first push plate, is a right-angled trapezoid section, and the inclined surface faces upwards; an inclined plane is arranged at the opening of the clamping groove; the number of the constant pressure grooves is multiple, the cross sections of the constant pressure grooves are right trapezoid cross sections, and the inclined surfaces face upwards; a group of rollers are arranged at the end part of the clamping block; the trapezoidal inclined plane of the clamping block, the inclined plane of the clamping groove and the trapezoidal inclined plane of the constant pressure groove are parallel to each other; the during operation, the constant pressure groove is provided with a plurality ofly, can be suitable for the PCB board pressurize pressfitting of different thickness, improve application scope, and set up screens piece inclined plane, the inclined plane and the constant pressure groove inclined plane in screens groove are parallel to each other, when pressurize to PCB is sealed, only need press down the clamp plate, the inclined plane in screens groove can push the screens piece to first cavity internal motion this moment, press down the in-process with screens piece card in the constant pressure groove, when the PCB board that corresponds different thickness is adjusted screens piece and is got into different constant pressure grooves, can continue to press down the clamp plate, the inclined plane in constant pressure groove can push the inclined plane of screens piece and contract to adjust in the first cavity, when the assembly is adjusted, need not press the gasbag, practice thrift assembly adjustment time, be provided with the cylinder on the tip of screens piece in addition, conveniently adjust the screens piece.

Preferably, the top end of the clamping rod is provided with a first groove; the bottom of the clamping groove is fixedly connected with a top block through a spring; the during operation can adjust because of the screens piece, does not receive external influence after ensureing to confirm the standard pressure value at the screens piece in the constant pressure tank, is provided with the kicking block at the screens inslot, and the kicking block can withstand the clamping rod top, under kicking block spring force, lets the laminating that the bottom of screens piece is tight on the bottom lateral wall of constant pressure tank, guarantees that the standard pressure value does not receive external factor's influence.

Preferably, a group of guide posts is fixedly connected to the lower pressure plate; a group of guide grooves are formed in the positions, opposite to the guide posts of the lower pressing plate, of the upper pressing plate; during operation, when assembling the pressure maintaining jig, the guide groove of the upper pressing plate is firstly placed on the guide post of the lower pressing plate, the assembling time is further saved, the pressure maintaining jig is also convenient to assemble and adjust, the stability and the accuracy are provided for the assembling of the pressure maintaining jig, and the sealing effect of the PCB is improved.

Preferably, a second groove is formed at the bottom of the constant pressure groove; the bottom of the second groove is fixedly connected with a pushing block through a second spring, and the pushing block slides on the side walls of the bottom ends of the constant pressure groove and the second groove; a third through groove is formed in the bottom end of the push block; a group of elastic bags are fixedly connected at the bottom of the third through groove and the bottom of the second groove; the elastic bag is fixedly connected with an elastic ball; the elastic force of the first spring is greater than that of the second spring; when in work, the clamping block is pushed by the elasticity of the first spring when performing constant pressure groove, however, the elasticity of the spring is instantaneous, which can cause the clamping block to collide in the constant pressure groove rapidly, and the clamping block is easy to be damaged for a long time, in order to avoid the situation, a second groove is arranged at the bottom of the constant pressure groove, when the clamping block extends into the constant pressure groove under the elastic force of the first spring, the push block is pushed to move towards the second groove, the elastic force of the first spring offsets a part of impact force through the elastic force of the second spring, in the moving process of the push block, the elastic bags collide with each other to offset part of the elastic force of the second spring again, so that the impact force of the clamping block is reduced, and the mutual collision between the elastic balls on the elastic bag can generate vibration, so that solder paste between the PCBs can be attached more uniformly by the vibration, and the sealing effect between the PCBs is improved.

Preferably, the top end of the push block is provided with an inclined surface; a group of arc-shaped grooves are formed in the positions, corresponding to the clamping block inclined surface roller, of the trapezoidal inclined surfaces of the constant pressure grooves; a group of oil storage cavities are formed in the trapezoidal inclined plane of the constant pressure groove at positions corresponding to the arc groove; the oil storage cavity is communicated with the arc-shaped groove through an oil outlet; a second cavity is formed between the oil storage cavity and the arc-shaped groove; the second cavity penetrates through the oil outlet, and a baffle is fixedly connected to the side wall, far away from the second groove, of the second cavity through a spring; a group of first through holes is formed in the baffle, and the end part, close to the second groove, of the baffle slides on the inclined surface of the push block; when the clamping block pushes the push block to move towards the second groove, the push block moves to push the baffle to move in the second cavity, the first through hole and the oil outlet are communicated with each other, lubricating oil in the oil storage cavity enters the arc-shaped groove through the oil outlet, when the clamping block enters the constant pressure groove, the roller on the clamping block is attached to the arc-shaped groove, the lubricating oil lubricates the surface of the roller, the clamping block is convenient to move when the pressure of the pressure maintaining piece is adjusted, the friction force of the clamping block is further reduced, and the adjusting time is saved; because of the cylinder is the laminating on the arc wall, can plug up oil outlet on the arc wall, let lubricating oil only lubricate the cylinder surface, practice thrift the use amount of lubricating oil.

Preferably, an elastic curved membrane is fixedly connected in the oil storage cavity; the elastic curved membrane and the hole-free cavity of the oil storage cavity form a sealed cavity; the baffle is connected to the inner wall of the second cavity in a sealing and sliding manner, and a sealing cavity formed by the baffle and the second cavity is communicated with a sealing cavity in the oil storage cavity; when the baffle plate moves towards the second cavity, gas in the second cavity enters the hole-free cavity of the oil storage cavity, the elastic curved membrane is pushed to expand towards the hole cavity of the oil storage cavity, and lubricating oil in the hole cavity is pushed to lubricate the roller through the oil outlet.

A use method of a microphone pressure maintaining jig for Internet of things equipment is suitable for the microphone pressure maintaining jig for the Internet of things equipment, and comprises the following steps:

s1: firstly, putting the stacked PCB needing pressure maintaining into a pressing groove of a lower pressing plate, aligning a guide groove of an upper pressing plate to a guide column of the lower pressing plate, and pressing the upper pressing plate downwards to assemble a pressure maintaining jig;

s2: pressing the upper pressing plate downwards, enabling the clamping rod to enter the clamping groove, clamping the clamping block into the constant pressure groove, adjusting the clamping block to be clamped into different constant pressure grooves according to the thickness of the PCB, and adjusting different pressure maintaining pressures by adjusting the distance between the upper pressing plate and the lower pressing plate;

s3: after the pressure maintaining and sealing of the stacked PCB are finished, the air bag is extruded to drive the clamping block to be separated from the constant pressure groove, the upper pressing plate and the lower pressing plate are separated, the pressure maintaining state is relieved, and the stacked PCB is taken out.

The invention has the following beneficial effects:

1. according to the microphone pressure maintaining jig for the Internet of things equipment and the using method of the microphone pressure maintaining jig, the distance between the upper pressing plate and the lower pressing plate is in a constant value through the clamping assembly of the pressure maintaining parts, so that the pressure maintaining force applied by the pressure maintaining jig is in a constant value state, the pressure maintaining parts are clamped and maintained, the assembly is rapid and simple, the production efficiency can be improved, the number of the pressure maintaining grooves is multiple, the microphone pressure maintaining jig can be suitable for pressure maintaining and laminating of PCB plates with different thicknesses, and the application range of the jig is widened.

2. According to the microphone pressure maintaining jig for the Internet of things equipment and the using method of the microphone pressure maintaining jig, the pushing block and the elastic bag are matched with each other, so that the impact force of the clamping block is relieved, the elastic balls on the elastic bag collide with each other to generate vibration, the vibration enables solder paste between PCBs to be attached more uniformly, and the sealing effect between PCBs is improved.

3. According to the microphone pressure maintaining jig for the Internet of things equipment and the using method of the microphone pressure maintaining jig, due to the fact that the pushing block, the baffle plate and the oil storage cavity are matched with each other, when the clamping block is clamped into the constant pressure groove and the clamping block pushes the pushing block to move towards the second groove, the pushing block can push the baffle plate to move in the second cavity through moving, the first through hole and the oil outlet hole are communicated with each other, lubricating oil in the oil storage cavity enters the arc-shaped groove through the oil outlet hole, the roller attached to the arc-shaped groove is lubricated, the clamping block can be conveniently moved when pressure of the pressure maintaining piece is adjusted, friction force of the clamping block is further reduced, and adjusting time is saved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a cross-sectional view of a retention element;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is an enlarged view of area B of FIG. 2;

FIG. 5 is an enlarged view of area C of FIG. 3;

FIG. 6 is an enlarged view of region D of FIG. 5;

fig. 7 is a schematic flow chart of a using method of a microphone pressure maintaining jig for internet of things equipment;

in the figure: 1. an upper pressure plate; 11. a lower pressing plate; 12. a pressing groove; 13. notching; 2. a guide groove; 21. a guide post; 3. a pressure retention member; 31. a position clamping rod; 32. a clamping groove; 33. a first cavity; 34. a first push plate; 35. a bit block; 36. a drum; 37. a seal ring; 38. a constant pressure groove; 39. an air bag; 4. a first groove; 41. a top block; 5. a second groove; 51. a push block; 52. a third through groove; 53. an elastic bag; 54. an elastic ball; 6. a second cavity; 61. an oil storage chamber; 62. a baffle plate; 63. a first through hole; 64. an oil outlet hole; 65. an arc-shaped slot; 66. an elastic curved film.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, the microphone pressure maintaining jig for internet of things equipment and the using method thereof according to the present invention include an upper pressing plate 1 and a lower pressing plate 11; a combination groove 12 is formed at the opposite position of the upper pressing plate 1 and the lower pressing plate 11; the upper pressing plate 1 and the lower pressing plate 11 are subjected to pressure maintaining through a pressure maintaining piece 3; notches 13 are formed in the side walls of the two sides of the lower pressing plate 11; the pressure maintaining part 3 comprises a clamping rod 31 and a clamping groove 32; clamping rods 31 are fixedly connected to the periphery of the lower pressing plate 11; a clamping groove 32 is formed in the position, opposite to the clamping rod 31, of the upper pressure plate 1; a pair of first cavities 33 which are symmetrically distributed are formed in the position clamping rod 31; a first push plate 34 is connected to the inner wall of the first cavity 33 in a sealing and sliding manner, and the first push plate 34 is fixedly connected to the side wall of the first cavity 33 through a first spring; a clamping block 35 is fixedly connected to the side wall of the first push plate 34 close to the outer side wall of the clamping rod 31; the clamping block 35 penetrates through the first cavity 33 and extends out of the clamping rod 31, a sealing ring 37 is arranged at the penetrating point, and the sealing ring 37 is fixedly connected to the side wall of the first cavity 33; a constant pressure groove 38 is formed on the side wall of the clamping groove 32; an air bag 39 is fixedly connected to the bottom of the notch 13; the air bag 39 and the first cavity 33 are communicated with each other; when the microphone is used, in the prior art, when the PCB is subjected to pressure maintaining, generally, the pressure maintaining is carried out through screws or rotating blocks, so that the pressure is not standard pressure, the pressure is changed, no uniform pressure value exists, and the pressure is unbalanced due to the fact that the screws and the rotating blocks are required to be sequentially subjected to rotating and pressing during the pressure maintaining, so that the tightness of the PCB is poor, and the microphone is easy to break; the upper pressing plate 1 and the lower pressing plate 11 are pressurized by the pressure maintaining piece 3, in the pressing process, the air bag 39 is pressed, air in the air bag 39 enters the first cavity 33, the first pressing plate 34 is pushed to move inwards, the clamping block 35 is driven to contract towards the first cavity 33, after the clamping block 35 on the clamping rod 31 enters the clamping groove 32, the air bag 39 is released, the clamping block 35 can be attached to the inner wall of the clamping groove 32, after the clamping block 35 reaches the position of the fixed pressure groove 38, the clamping block 35 is pushed to be clamped into the fixed pressure groove 38 under the elastic force of the first spring, at the moment, the distance between the upper pressing plate 1 and the lower pressing plate 11 is fixed, the pressure maintaining force applied by the pressure maintaining piece 3 is in a fixed value state, the pressure maintaining piece 3 is clamped for pressure maintaining, the assembling is rapid and simple, and convenient, and the production efficiency can be improved.

As an embodiment of the present invention, the section of the end of the position-locking block 35 away from the first pushing plate 34 is a right-angled trapezoid section, and the inclined surface faces upward; an inclined surface is arranged at the opening of the clamping groove 32; a plurality of constant pressure grooves 38 are arranged, the cross section of each constant pressure groove 38 is a right-angled trapezoid cross section, and the inclined surface faces upwards; a group of rollers 36 are arranged at the end part of the clamping block 35; the trapezoidal inclined plane of the clamping block 35, the inclined plane of the clamping groove 32 and the trapezoidal inclined plane of the constant pressure groove 38 are parallel to each other; when in work, a plurality of constant pressure grooves 38 are arranged, which can be suitable for pressure maintaining and laminating of PCB boards with different thicknesses, improve the application range, and the inclined planes of the clamping block 35, the clamping groove 32 and the constant pressure groove 38 are arranged to be parallel to each other, when the PCB is subjected to pressure maintaining and sealing, only the upper pressing plate 1 needs to be pressed down, at the moment, the inclined surface of the clamping groove 32 pushes the clamping block 35 to move towards the first cavity 33, the clamping block 35 is clamped in the constant pressure groove 38 in the pressing process, when the clamping block 35 is adjusted to enter different constant pressure grooves 38 corresponding to PCBs with different thicknesses, the upper pressure plate 1 can be pressed continuously, the inclined surface of the constant pressure groove 38 pushes the inclined surface of the clamping block 35 to shrink into the first cavity 33 for adjustment, when the assembly is adjusted, the air bag 39 does not need to be pressed, the assembly adjusting time is saved, and the roller 36 is arranged at the end part of the clamping block 35, so that the clamping block 35 can be conveniently adjusted.

As an embodiment of the present invention, a first groove 4 is formed at the top end of the position-locking rod 31; the bottom of the clamping groove 32 is fixedly connected with a top block 41 through a spring; in operation, because of screens piece 35 can adjust, for guaranteeing not receive external influence behind the screens piece 35 standard pressure value to confirm in level pressure groove 38, be provided with kicking block 41 in screens groove 32, kicking block 41 can withstand the screens pole 31 top, under kicking block 41 spring force effect, lets the tight laminating in bottom of screens piece 35 on the bottom lateral wall of level pressure groove 38, guarantees that standard pressure value does not receive external factor's influence.

As an embodiment of the present invention, a set of guide posts 21 is fixed on the lower pressure plate 11; a group of guide grooves 2 are formed in the upper pressing plate 1 at positions corresponding to the guide posts 21 of the lower pressing plate 11; during operation, when assembling the pressure maintaining jig, the guide groove 2 of the upper press plate 1 is firstly placed on the guide post 21 of the lower press plate 11, the assembling time is further saved, the pressure maintaining piece 3 is also convenient to assemble and adjust the pressure maintaining jig, the stability and the accuracy are provided for the assembling of the pressure maintaining jig, and the sealing effect of the PCB is improved.

As an embodiment of the present invention, the bottom of the constant pressure groove 38 is provided with a second groove 5; a pushing block 51 is fixedly connected to the bottom of the second groove 5 through a second spring, and the pushing block 51 slides on the side walls of the bottom ends of the constant pressure groove 38 and the second groove 5; the bottom end of the push block 51 is provided with a third through groove 52; a group of elastic bags 53 are fixedly connected at the bottom of the third through groove 52 and the bottom end of the second groove 5; an elastic ball 54 is fixedly connected to the elastic bag 53; the elastic force of the first spring is greater than that of the second spring; when the PCB fixing device works, when the clamping block 35 is pressed into the constant pressure groove 38, the clamping block 35 is pushed by the elastic force of the first spring, but the elastic force of the spring has instantaneity, so that the clamping block 35 collides into the constant pressure groove 38 rapidly, the clamping block 35 is easy to be damaged for a long time, in order to avoid the situation, the groove bottom of the constant pressure groove 38 is provided with the second groove 5, when the clamping block 35 extends into the constant pressure groove 38 by the elastic force of the first spring, the pushing block 51 is pushed to move into the second groove 5, the elastic force of the first spring offsets a part of impact force by the elastic force of the second spring, when the pushing block 51 moves, the elastic bags 53 collide with each other, a part of the elastic force of the second spring is offset again, the impact force of the clamping block 35 is relieved, and the elastic balls 54 on the elastic bags 53 collide with each other, vibration is generated, and the solder paste between PCBs can be attached more tightly by vibration, the sealing effect between the PCB boards is improved.

As an embodiment of the present invention, the top end of the push block 51 is provided with an inclined surface; a group of arc-shaped grooves 65 are formed in the trapezoidal inclined surface of the constant pressure groove 38 at the position corresponding to the inclined surface roller 36 of the clamping block 35; a group of oil storage cavities 61 are formed in the trapezoidal inclined surface of the constant pressure groove 38 at positions corresponding to the arc-shaped groove 65; the oil storage cavity 61 and the arc-shaped groove 65 are communicated with each other through an oil outlet 64; a second cavity 6 is arranged between the oil storage cavity 61 and the arc-shaped groove 65; the second cavity 6 penetrates through the oil outlet 64, and a baffle plate 62 is fixedly connected to the side wall, far away from the second groove 5, of the second cavity 6 through a spring; a group of first through holes 63 are formed in the baffle plate 62, and the end part of the baffle plate 62 close to the second groove 5 slides on the inclined surface of the push block 51; when the clamping block 35 is used for pushing the pushing block 51 to move towards the second groove 5, the pushing block 51 moves to push the baffle plate 62 to move in the second cavity 6, the first through hole 63 and the oil outlet 64 are communicated with each other, lubricating oil in the oil storage cavity 61 enters the arc-shaped groove 65 through the oil outlet 64, when the clamping block 35 enters the constant pressure groove 38, the roller 36 on the clamping block 35 is attached in the arc-shaped groove 65, the lubricating oil lubricates the surface of the roller 36, the clamping block 35 is convenient to move when the pressure of the pressure maintaining piece 3 is adjusted, the friction force of the clamping block 35 is further reduced, and the adjusting time is saved; because the roller 36 is attached to the inner wall of the arc-shaped groove 65, the oil outlet 64 in the arc-shaped groove 65 can be blocked, so that lubricating oil only lubricates the surface of the roller 36, and the using amount of the lubricating oil is saved.

As an embodiment of the present invention, an elastic curved membrane 66 is fixed in the oil storage chamber 61; the elastic curved membrane 66 and the non-porous cavity of the oil storage cavity 61 form a sealed cavity; the baffle plate 62 is connected to the inner wall of the second cavity 6 in a sealing and sliding manner, and a sealing cavity formed by the baffle plate 62 and the second cavity 6 is communicated with a sealing cavity in the oil storage cavity 61; when the baffle plate 62 moves towards the second cavity 6, the gas in the second cavity 6 enters the non-porous cavity of the oil storage cavity 61, the elastic curved membrane 66 is further pushed to expand towards the porous cavity of the oil storage cavity 61, and the lubricating oil with the porous cavity is pushed to lubricate the roller 36 through the oil outlet 64.

The working principle is as follows: during operation, a plurality of PCBs needing pressure maintaining are placed in the pressing groove 12 of the lower pressing plate 11, the guide groove 2 of the upper pressing plate 1 is aligned to the guide post 21 of the lower pressing plate 11, the upper pressing plate 1 is pressed downwards, at the moment, the inclined surface of the clamping groove 32 can push the clamping block 35 to move towards the first cavity 33, the clamping block 35 is clamped in the pressure-fixing groove 38 in the pressing process, when the clamping block 35 is adjusted to enter different pressure-fixing grooves 38 corresponding to PCBs with different thicknesses, the upper pressing plate 1 can be continuously pressed downwards, and the inclined surface of the pressure-fixing groove 38 can push the inclined surface of the clamping block 35 to shrink towards the first cavity 33 to adjust different standard pressure values; when the clamping block 35 enters the constant pressure groove 38, the pushing block 51 is pushed to move, the pushing block 51 moves to drive the elastic bags 53 to collide with each other, vibration is generated, the vibration enables the solder paste among the PCBs to be attached more tightly, and when the clamping block 35 pushes the pushing block 51 to move towards the second groove 5, the pushing block 51 moves to push the baffle plate 62 to move in the second cavity 6, the first through hole 63 and the oil outlet hole 64 are communicated with each other, when the baffle plate 62 moves towards the second cavity 6, gas in the second cavity 6 enters the non-porous cavity of the oil storage cavity 61, the elastic curved membrane 66 is further pushed to expand towards the porous cavity of the oil storage cavity 61, lubricating oil in the oil storage cavity 61 is pushed to enter the arc-shaped groove 65 through the oil outlet hole 64, when the clamping block 35 enters the constant pressure groove 38, the roller 36 on the clamping block 35 is attached in the arc-shaped groove 65, the surface of the roller 36 is lubricated by the lubricating oil, and the clamping block 35 is convenient to move when the pressure of the pressure maintaining piece 3 is adjusted, the lubricating oil can further reduce the friction force between the clamping block 35 and the constant pressure groove 38, and the adjusting time is saved; after the pressure maintaining and sealing of the PCB are finished, the air bag 39 is extruded, air in the air bag 39 enters the first cavity 33, the first push plate 34 is pushed to move inwards, the clamping block 35 is driven to contract towards the inside of the first cavity 33 at the same time, the clamping block is separated from the constant pressure groove 38, the upper pressing plate 1 and the lower pressing plate 11 are separated to release the pressure maintaining state, and the PCB is taken out.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A microphone pressure maintaining jig for Internet of things equipment is characterized by comprising an upper pressing plate (1) and a lower pressing plate (11); a group of pressing grooves (12) are formed in the positions, opposite to the upper pressing plate (1) and the lower pressing plate (11), of the upper pressing plate; the upper pressing plate (1) and the lower pressing plate (11) are subjected to pressure maintaining through the pressure maintaining piece (3); notches (13) are formed in the side walls of the two sides of the lower pressing plate (11); the pressure maintaining piece (3) comprises a clamping rod (31) and a clamping groove (32); clamping rods (31) are fixedly connected to the periphery of the lower pressing plate (11); a clamping groove (32) is formed in the position, opposite to the clamping rod (31), of the upper pressure plate (1); a pair of first cavities (33) which are symmetrically distributed are formed in the clamping rod (31); a first push plate (34) is connected to the inner wall of the first cavity (33) in a sealing sliding manner, and the first push plate (34) is fixedly connected to the side wall of the first cavity (33) through a first spring; a clamping block (35) is fixedly connected to the side wall, close to the outer side wall of the clamping rod (31), of the first push plate (34); the clamping block (35) penetrates through the first cavity (33) and extends out of the clamping rod (31), a sealing ring (37) is arranged at the penetrating point, and the sealing ring (37) is fixedly connected to the side wall of the first cavity (33); a constant pressure groove (38) is formed in the side wall of the clamping groove (32); an air bag (39) is fixedly connected to the bottom of the notch groove (13); the air bag (39) and the first cavity (33) are in communication with each other.

2. The microphone pressure maintaining jig for the equipment of the internet of things as claimed in claim 1, wherein the cross section of the end of the clamping block (35) far away from the first pushing plate (34) is a right trapezoid cross section, and the inclined plane faces upwards; an inclined surface is arranged at the opening of the clamping groove (32); the number of the constant pressure grooves (38) is multiple, the cross section of each constant pressure groove (38) is a right-angled trapezoid cross section, and the inclined surface faces upwards; a group of rollers (36) are arranged at the end part of the clamping block (35); the trapezoidal inclined plane of the clamping block (35), the inclined plane of the clamping groove (32) and the trapezoidal inclined plane of the constant pressure groove (38) are mutually parallel.

3. The microphone pressure maintaining jig for the equipment of the internet of things as claimed in claim 2, wherein a first groove (4) is formed at the top end of the clamping rod (31); the bottom of the clamping groove (32) is fixedly connected with a top block (41) through a spring.

4. The microphone pressure maintaining jig for the equipment of the internet of things as claimed in claim 3, wherein a set of guide posts (21) is fixedly connected to the lower pressure plate (11); a group of guide grooves (2) are formed in the upper pressing plate (1) at positions opposite to the guide columns (21) of the lower pressing plate (11).

5. The microphone pressure maintaining jig for the equipment of the internet of things as claimed in claim 4, wherein a second groove (5) is formed at the bottom of the constant pressure groove (38); a pushing block (51) is fixedly connected to the bottom of the second groove (5) through a second spring, and the pushing block (51) slides on the side walls of the bottom ends of the constant pressure groove (38) and the second groove (5); the bottom end of the push block (51) is provided with a third through groove (52); a group of elastic bags (53) are fixedly connected at the bottom of the third through groove (52) and the bottom end of the second groove (5); an elastic ball (54) is fixedly connected to the elastic bag (53); the elastic force of the first spring is greater than that of the second spring.

6. The microphone pressure maintaining jig for the equipment of the Internet of things as claimed in claim 5, wherein the top end of the push block (51) is provided with an inclined surface; a group of arc-shaped grooves (65) are formed in the positions, corresponding to the inclined surface roller (36) of the clamping block (35), on the trapezoidal inclined surface of the constant pressure groove (38); a group of oil storage cavities (61) are formed in the trapezoidal inclined surface of the constant pressure groove (38) at positions corresponding to the arc-shaped groove (65); the oil storage cavity (61) is communicated with the arc-shaped groove (65) through an oil outlet (64); a second cavity (6) is arranged between the oil storage cavity (61) and the arc-shaped groove (65); the second cavity (6) penetrates through the oil outlet (64), and a baffle plate (62) is fixedly connected to the side wall, far away from the second groove (5), of the second cavity (6) through a spring; a group of first through holes (63) is formed in the baffle (62), and the end portion, close to the second groove (5), of the baffle (62) slides on the inclined surface of the push block (51).

7. The microphone pressure maintaining jig for the equipment of the internet of things as claimed in claim 6, wherein an elastic curved membrane (66) is fixedly connected in the oil storage cavity (61); the elastic curved membrane (66) and the non-porous cavity of the oil storage cavity (61) form a sealed cavity; baffle (62) sealed sliding connection is on second cavity (6) inner wall, and the sealed chamber that baffle (62) and second cavity (6) formed and the sealed chamber in oil storage chamber (61) communicate each other.

8. An application method of a microphone pressure maintaining jig for internet of things equipment is applicable to the microphone pressure maintaining jig for the internet of things equipment in any one of claims 1 to 7, and is characterized in that: the method comprises the following steps: