Pressure maintaining jig

Abstract

The utility model belongs to the technical field of circuit board processing, and discloses a pressure maintaining jig, which comprises a carrier and a pressure maintaining assembly, and is characterized in that the carrier is used for supporting a product to be subjected to pressure maintaining, and the product to be subjected to pressure maintaining is of a hollow structure and comprises a pressed surface; the pressure maintaining assembly is connected to the carrier in a sliding mode so that the pressure maintaining assembly can move close to or away from the carrier, the pressure maintaining assembly is provided with a pressure maintaining protrusion, and the pressure maintaining protrusion is configured to abut against the edge of the pressed face. According to the pressure maintaining jig, the rejection rate of products to be subjected to pressure maintaining can be reduced, and high reliability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a pressure-maintaining jig. Background Art

[0002] When using surface mount technology to mount electronic components, solder paste must first be printed on the motherboard, followed by the placement of the electronic components. Once the placement is complete, the solder paste must be melted in an oven to ensure a tight bond between the solder paste and the electronic components, creating a complete and full solder paste line and ensuring good signal shielding.

[0003] In the prior art, during the process of melting the solder paste in the furnace, the motherboard needs to be placed on a carrier. From the front to the back of the furnace, the temperature change will vary with the difference between the front and rear sections until the solder paste solidifies. During the furnace process, in order to prevent the electronic components from shifting when the solder paste dissolves, it is necessary to use a pressure-holding jig to press the electronic components. Specifically, the pressure-holding jig is provided with a pressure block, the lower surface of the pressure block is in contact with the middle area of ​​the upper surface of the electronic component, and by applying a holding pressure to the pressure block, the electronic component can be pressed to prevent the electronic component from shifting. However, for electronic components with a hollow structure, the pressure block directly fits the middle area of ​​the electronic component and applies force to the electronic component, which makes it easier for the middle area of ​​the electronic component to be collapsed or deformed, affecting the yield rate of surface mounting, and the reliability of the pressure holding is low. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure-maintaining jig, which can reduce the scrap rate of the product to be pressure-maintained and has high reliability.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A pressure-maintaining jig, comprising:

[0007] A carrier, the carrier is used to support the product to be pressurized, the product to be pressurized is a hollow structure and includes a pressure-bearing surface;

[0008] A pressure-maintaining component is slidably connected to the carrier so that the pressure-maintaining component can move toward or away from the carrier. The pressure-maintaining component is provided with a pressure-maintaining protrusion, and the pressure-maintaining protrusion is configured to abut against the edge of the pressure-bearing surface.

[0009] Preferably, the pressure-maintaining protrusion is annular, and is surrounded by a contoured groove, the shape of which matches the shape of the hollow cavity of the product to be pressure-maintained.

[0010] Preferably, there are multiple pressure-keeping protrusions, and the multiple pressure-keeping protrusions are arranged at circumferential intervals along the pressure-keeping component, and the multiple pressure-keeping protrusions are arranged to form a contoured space, and the shape of the contoured space matches the shape of the hollow cavity of the product to be pressure-held.

[0011] Preferably, the pressure maintaining component comprises:

[0012] a cover plate, the cover plate being slidably connected to the carrier;

[0013] A contoured pressing block is provided on a side of the cover plate facing the carrier and is slidably connected to the cover plate; the pressure-maintaining protrusion is connected to a side of the contoured pressing block facing away from the cover plate;

[0014] An elastic member is provided between the cover plate and the contoured pressing block, and the elastic member always has a tendency to drive the contoured pressing block to move in a direction away from the cover plate.

[0015] Preferably, one of the contoured pressing block and the cover plate is provided with a linearly extending guide groove, and the other is provided with a guide structure that slides with the guide groove. When the contoured pressing block moves toward or away from the cover plate, the guide structure slides along the extension direction of the guide groove.

[0016] Preferably, the center of gravity of the contoured pressing block is configured such that a straight line passing through the center of gravity of the contoured pressing block and the center of the product to be pressure maintained extends along a first direction, which is a sliding direction of the pressure maintaining assembly relative to the carrier.

[0017] Preferably, the contoured pressing block and the pressure-maintaining protrusion are an integrally formed structure.

[0018] Preferably, the cross-sectional shape of the contoured pressing block is the same as or similar to the cross-sectional shape of the product to be pressure maintained.

[0019] Preferably, the cover plate includes a connecting portion and an assembly portion, the connecting portion is slidably connected to the carrier, and the connecting portion is provided with an avoidance hole, the assembly portion protrudes from the connecting portion in a direction away from the carrier, and is arranged opposite to the avoidance hole, the contoured pressure block is slidably connected to the assembly portion, and the elastic member is arranged between the assembly portion and the contoured pressure block.

[0020] Preferably, the surface of the pressure-maintaining protrusion that is in contact with the pressure-bearing surface is provided with a step structure, and the step structure is used to cooperate with the step of the product to be pressure-maintained.

[0021] Beneficial effects of the utility model:

[0022] The pressure-holding fixture provided by the present invention has a carrier for supporting the product to be pressure-held, and the pressure-holding component is slidably connected to the carrier so that the pressure-holding component can move relative to the carrier and approach or move away from the carrier. The pressure-holding component is provided with a pressure-holding protrusion, and the pressure-holding protrusion is used to abut against the edge of the pressure-bearing surface of the product to be pressure-held, so as to provide pressing force to the product to be pressure-held through the edge of the pressure-bearing surface. Since the hollow cavity of the product to be pressure-held is usually arranged in the middle area of ​​the product to be pressure-held, the pressure-holding protrusion has less contact with the part of the pressure-bearing surface used to enclose the hollow cavity, or even no contact, thereby reducing the probability of the product to be pressure-held being crushed or deformed, reducing the scrap rate of the surface mounting process, and improving the reliability of pressure-holding of the product to be pressure-held. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a pressure-maintaining fixture provided by an embodiment of the present utility model;

[0024] Figure 2 This is a top view of the pressure-maintaining fixture provided by an embodiment of the present utility model;

[0025] Figure 3 This is a structural diagram of the contoured pressing block, the guide structure, and the column provided in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of the contoured pressing block and the pressure-maintaining protrusion provided in an embodiment of the present utility model;

[0027] Figure 5 It is a top view of a plurality of products to be pressure-maintained and a contoured pressing block provided by an embodiment of the present utility model;

[0028] Figure 6 This is a reference diagram of the use state of part of the pressure-maintaining assembly provided by an embodiment of the present utility model;

[0029] Figure 7 This is a structural diagram of a cover plate provided by an embodiment of the present utility model;

[0030] Figure 8 It is a structural schematic diagram of part of the pressure-maintaining assembly provided by an embodiment of the present utility model;

[0031] Figure 9 This utility model Figure 2 The AA section view shown;

[0032] Figure 10 The utility model provides Figure 9 An enlarged view of point B is shown.

[0033] In the picture:

[0034] 100, carrier; 110, positioning column; 200, pressure-maintaining assembly; 210, pressure-maintaining protrusion; 211, step structure; 220, contoured groove; 230, cover plate; 231, guide groove; 232, connecting portion; 2321, avoidance hole; 233, assembly portion; 234, thickened portion; 240, contoured pressure block; 241, guide structure; 242, column; 250, elastic member; 260, spring lock;

[0035] 1. First element; 11. Pressure surface; 12. Hollow cavity; 13. Center; 14. Step; 2. Second element;

[0036] X, first direction. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] like Figures 1 to 10 As shown, this embodiment provides a pressure-holding jig for holding pressure on a product to be pressure-held in a surface mounting process, which can reduce the scrap rate of the product to be pressure-held and has high reliability.

[0043] Exemplarily, the product to be pressurized includes a first element 1 and a second element 2, with solder paste provided between the first element 1 and the second element 2. Specifically, the product to be pressurized is a hollow structure, so that the product to be pressurized has a hollow cavity 12. Optionally, the first element 1 is a flat plate-like structure, for example, a flat plate; the second element 2 can be an element with a groove, the second element 2 being inverted on the first element 1, the groove being used to form the hollow cavity 12, and solder paste being provided between the edge of the second element 2 and the first element 1. It should be noted that the product to be pressurized also includes a pressure-bearing surface 11, which is the surface of the second element 2 facing away from the first element 1.

[0044] The pressure-holding fixture includes a carrier 100 and a pressure-holding assembly 200. The carrier 100 is used to support the first component 1 of the product to be pressure-held. In some optional embodiments, the carrier 100 is provided with a positioning post 110. The first component 1 has a positioning hole. The positioning post 110 is inserted into the positioning hole to position the first component 1, thereby positioning and supporting the product to be pressure-held.

[0045] The pressure-maintaining assembly 200 in this embodiment is slidably connected to the carrier 100 so that the pressure-maintaining assembly 200 can move closer to or away from the carrier 100. When the pressure-maintaining assembly 200 moves closer to the carrier 100, it can apply a pressing force to the product to be pressure-maintained on the carrier 100, thereby achieving pressure maintenance of the product to be pressure-maintained. In some optional embodiments, the pressure-maintaining assembly 200 is slidably connected to the carrier 100 along a first direction X and can move closer to or away from the carrier 100 in the first direction X. That is, the first direction X is the sliding direction of the pressure-maintaining assembly 200 relative to the carrier 100. For example, the movement of the pressure-maintaining assembly 200 can be driven by an external force, such as a cylinder or other component, or a weight can be placed on the pressure-maintaining assembly 200 to achieve pressure on the product to be pressure-maintained. This embodiment is not limited to this.

[0046] like Figure 4 As shown, the pressure-maintaining assembly 200 is provided with a pressure-maintaining protrusion 210. Exemplarily, the pressure-maintaining protrusion 210 protrudes toward the carrier 100. The pressure-maintaining protrusion 210 is configured to abut against the edge of the pressure-receiving surface 11. That is, the pressure-maintaining protrusion 210 does not completely contact the entire pressure-receiving surface 11, but contacts the edge of the pressure-receiving surface 11. This allows the pressing force of the pressure-maintaining assembly 200 to be transmitted to the edge of the product to be pressure-maintained or the second component 2 through the pressure-maintaining protrusion 210, while having little contact with, or even no contact with, the portion of the pressure-receiving surface 11 that encloses the hollow cavity 12, thereby reducing the probability of the product to be pressure-maintained being crushed or deformed.

[0047] The pressure-holding fixture provided in this embodiment has a carrier 100 for supporting the product to be pressure-held, and a pressure-holding component 200 is slidably connected to the carrier 100 so that the pressure-holding component 200 can move relative to the carrier 100 and approach or move away from the carrier 100. The pressure-holding component 200 is provided with a pressure-holding protrusion 210, and the pressure-holding protrusion 210 is used to abut against the edge of the pressure-bearing surface 11 of the product to be pressure-held, so as to provide pressing force to the product to be pressure-held through the edge of the pressure-bearing surface 11. Since the hollow cavity 12 of the product to be pressure-held is usually arranged in the middle area of ​​the product to be pressure-held, the pressure-holding protrusion 210 has less contact with the part of the pressure-bearing surface 11 for surrounding the hollow cavity 12, or even no contact, thereby reducing the probability of the product to be pressure-held being crushed or deformed, reducing the scrap rate of the surface mounting process, and improving the reliability of pressure-holding of the product to be pressure-held.

[0048] In some optional embodiments, such as Figure 4 As shown, the pressure-maintaining protrusion 210 is annular and surrounds a contoured groove 220. The shape of the contoured groove 220 matches the shape of the hollow cavity 12 of the product to be pressure-maintained. By configuring the pressure-maintaining protrusion 210 in an annular shape, the pressure-maintaining protrusion 210 can abut against the circumferential edge of the pressure-receiving surface 11. This allows the pressure-maintaining protrusion 210 and the pressure-receiving surface 11 to have a larger contact area while preventing the product from collapsing. This can improve the uniformity of the force applied to the product to be pressure-maintained, thereby enhancing the pressure-maintaining effect. For example, when the pressure-maintaining protrusion 210 abuts the pressure-receiving surface 11, the contoured groove 220 and the hollow cavity 12 are arranged relative to each other in the first direction X.

[0049] In this embodiment, the shape of the profiling groove 220 matches the shape of the hollow cavity 12 of the product to be pressurized, which can be understood as: the cross-sectional shape of the profiling groove 220 is the same or similar to the cross-sectional shape of the hollow cavity 12, so as to avoid the hollow cavity 12 as much as possible and reduce the probability of the product to be pressurized being deformed.

[0050] In other optional embodiments, multiple pressure-maintaining protrusions 210 are provided. These protrusions 210 can be spaced apart circumferentially around the pressure-maintaining assembly 200, forming a contoured space whose shape matches the hollow cavity 12 of the product to be pressure-maintained. Providing multiple pressure-maintaining protrusions 210 can achieve the effect of uniformly applying external force to the product to be pressure-maintained, while also preventing the central region of the product from collapsing and reducing the risk of damage to the product.

[0051] Alternatively, as Figure 2 and Figure 6 As shown, the pressure-maintaining assembly 200 includes a cover plate 230, a contoured pressure block 240, and an elastic member 250. The cover plate 230 is slidably connected to the carrier 100, allowing the cover plate 230 to move toward or away from the carrier 100 under the action of an external force. The contoured pressure block 240 is disposed on the side of the cover plate 230 facing the carrier 100 and is slidably connected to the cover plate 230, allowing the contoured pressure block 240 to move relative to the cover plate 230. The pressure-maintaining protrusion 210 is connected to the side of the contoured pressure block 240 facing away from the cover plate 230 to abut against the product to be pressure-maintained on the carrier 100. The elastic member 250 in this embodiment is disposed between the cover plate 230 and the contoured pressing block 240, and the elastic member 250 always has a tendency to drive the contoured pressing block 240 to move away from the cover plate 230, so that the pressure-maintaining protrusion 210 connected to the contoured pressing block 240 can elastically press the product to be pressure-maintained under the action of the elastic member 250.

[0052] Optionally, one or more elastic members 250 may be provided between the contoured pressing block 240 and the cover plate 230, which is not limited in this embodiment. For example, the elastic member 250 includes but is not limited to a spring.

[0053] For example, Figure 3 or Figure 6 As shown, the contoured pressing block 240 may be provided with a column 242. One end of the column 242 is connected to the contoured pressing block 240, and the other end passes through a through-hole in the cover plate 230 and is connected to a spring lock 260. The spring lock 260 is used to restrict the other end of the column 242 from being pushed out of the through-hole in the cover plate 230. The elastic member 250 is sleeved on the column 242 to provide support for the elastic member 250.

[0054] Optionally, a return spring may be provided between the carrier 100 and the cover plate 230. When the pressure-maintaining assembly 200 is unstressed, the return spring supports the cover plate 230, thereby maintaining a certain gap between the cover plate 230 and the carrier 100. The return spring may be mounted on a guide post, one end of which is connected to one of the carrier 100 and the cover plate 230 and can be slidably passed through the other to achieve a sliding connection between the cover plate 230 and the carrier 100.

[0055] In some optional embodiments, the contoured pressing block 240 and the pressure-retaining protrusion 210 are integrally formed, that is, both can be manufactured in a single manufacturing process. Integrating the contoured pressing block 240 and the pressure-retaining protrusion 210 improves the integrity of the pressure-retaining assembly 200, reduces the likelihood of the pressure-retaining protrusion 210 and the contoured pressing block 240 separating, and facilitates the manufacture of the contoured pressing block 240 and the pressure-retaining protrusion 210. For example, the pressure-retaining protrusion 210 and the contoured pressing block 240 can be directly formed on a single block by digging out excess material.

[0056] In some other optional embodiments, the contoured pressure block 240 and the pressure-maintaining protrusion 210 may not be an integrally formed structure, but a separate structure. In this case, the two may be connected by a detachable or non-detachable connection such as bonding, welding, or snapping, and this embodiment does not limit this.

[0057] Illustratively, one of the profiling block 240 and the cover plate 230 is provided with a linearly extending guide groove 231, and the other is provided with a guide structure 241 that slidably engages with the guide groove 231. When the profiling block 240 moves relative to the cover plate 230, that is, when the profiling block 240 moves toward or away from the cover plate 230, the guide structure 241 slides along the extension direction of the guide groove 231, so that the guide groove 231 can guide the movement of the guide structure 241, thereby guiding the movement of the profiling block 240 relative to the cover plate 230. This ensures that the profiling block 240 does not deviate in the length, width, and first direction X of the cover plate 230 during movement. This ensures that the precise direction of force applied to the product to be pressurized in the first direction X is ensured, and that the profiling block 240 is accurately displaced in the first direction X. This avoids excessive or ineffective pressing of the product to be pressurized, thereby improving the reliability of the pressurization fixture. In this embodiment, for example, the guide structure 241 is provided on the contoured pressing block 240, and the guide groove 231 is provided on the cover plate 230. Optionally, one or more guide structures 241 and guide grooves 231 may be provided on the cover plate 230 or the contoured pressing block 240 to further improve the guiding effect.

[0058] In some optional embodiments, the center of gravity of the contoured pressing block 240 is configured such that a straight line passing through the center of gravity of the contoured pressing block 240 and the center 13 of the product to be pressurized extends along the first direction X. That is, the center of gravity of the contoured pressing block 240 coincides with the center 13 of the product to be pressurized in the first direction X. This ensures more uniform force on the product to be pressurized and prevents excessive local pressure. Alternatively, the center 13 of the product to be pressurized can be understood as the geometric center of the cross-section of the product to be pressurized.

[0059] For example, the number of contoured pressing blocks 240 can be determined based on actual needs. For example, the number of contoured pressing blocks 240 can be equal to the number of products to be pressurized, with a one-to-one correspondence between the two. Each contoured pressing block 240 is connected to a pressure-holding protrusion 210, so that each product to be pressurized can abut against the pressure-holding protrusion 210. The pressure-holding protrusion 210 on each contoured pressing block 240 is configured to abut against the edge of the pressure-bearing surface 11 of the corresponding product to be pressurized, ensuring that each product to be pressurized is not crushed or deformed.

[0060] It should be noted that when there are multiple contoured pressing blocks 240 , at least one elastic member 250 and a guide structure 241 or a guide groove 231 is provided between each contoured pressing block 240 and the cover plate 230 .

[0061] In some optional embodiments, the cross-sectional shape of the contoured pressing block 240 is the same as or similar to the cross-sectional shape of the product to be pressurized, so that on the basis of improving the uniform application of the holding pressure on the product to be pressurized, the size of the contoured pressing block 240 will not have excessive redundancy, and further, when there are multiple products to be pressurized, there will be no mutual interference between the contoured pressing blocks 240 corresponding to the multiple products to be pressurized, and clearance fit can be achieved, so that all products to be pressurized can be effectively pressurized in one pressurization operation.

[0062] For example, the cross-sectional shape of the contoured pressing block 240 may be a square, a rectangle, a triangle, a trapezoid, or a combination of at least two of these shapes, which is not limited in this embodiment.

[0063] It should be noted that the area where the pressure-retaining protrusion 210 contacts the pressure-receiving surface 11 of the product to be pressure-retained is offset by the same amount as the edge of the pressure-receiving surface 11 in the length and width directions of the pressure-receiving surface 11. This ensures that the force is applied uniformly on all sides of the second component 2, improving force uniformity. For example, the force-receiving area of ​​the pressure-receiving surface 11 can cover the position of the solder wire at the bottom of the second component 2, ensuring that the solder wire is intact, improving the contact between the first component 1 and the second component 2, and the sealing effect of the second component 2.

[0064] Alternatively, as Figure 7 and Figure 9As shown, the cover plate 230 includes a connecting portion 232 and an assembly portion 233 that are interconnected. The connecting portion 232 is slidably connected to the carrier 100, and the connecting portion 232 is provided with an avoidance hole 2321. The assembly portion 233 is provided on the side of the connecting portion 232 facing away from the carrier 100 and is connected to the connecting portion 232. That is, the assembly portion 233 protrudes from the connecting portion 232 in a direction away from the carrier 100. The assembly portion 233 and the avoidance hole 2321 are arranged opposite to each other, so that the assembly portion 233, the hole wall of the avoidance hole 2321 and the carrier 100 are surrounded to form an accommodating space. The contoured pressure block 240 is slidably connected to the assembly portion 233. The elastic member 250 is located in the accommodating space, and the elastic member 250 is arranged between the assembly portion 233 and the contoured pressure block 240.

[0065] In this embodiment, by designing the mounting portion 233 to have a height difference with the connecting portion 232 and positioning the elastic member 250 between the mounting portion 233 and the contoured pressure block 240, the elastic member 250 is made longer, thereby enhancing the elastic compression effect of the contoured pressure block 240, thereby enhancing the elastic compression effect on the product to be pressure-held. Furthermore, the contoured pressure block 240 and the pressure-holding protrusion 210 have a larger range of movement, thereby expanding the application range of the pressure-holding fixture.

[0066] In some optional embodiments, such as Figure 4 As shown, the surface of the pressure-holding protrusion 210 that contacts the pressure-receiving surface 11 is provided with a step structure 211. The step structure 211 is configured to cooperate with the step 14 of the product to be pressure-held, so that the shape of the pressure-holding protrusion 210 can better match the shape of the pressure-receiving surface 11. This avoids the situation where part of the pressure-receiving surface 11 cannot be pressed when the product to be pressure-held has the step 14. This ensures that the edges of the pressure-receiving surface 11 are subjected to the pressure-holding force, thereby improving the pressure-holding effect.

[0067] When using the pressure-maintaining fixture provided in this embodiment, the elastic member 250 on the contoured pressure block 240 must be calibrated and measured before assembling it onto the cover plate 230 to ensure that the spring force is within the required range. After assembly, gently press the contoured pressure block 240 in the first direction X to ensure it is properly seated and free of any obstructions.

[0068] Next, after solder paste is printed on the first component 1 (e.g., a motherboard) and the second component 2 is attached to the carrier 100, the cover 230 of the pressure-maintaining assembly 200 needs to be precisely installed on top of the carrier 100 using the four positioning posts 110. At this point, the pressure-maintaining protrusions 210 on the contoured pressure block 240 have already contacted the second component 2. An external device (e.g., a cylinder or other device) then applies force to the cover 230, maintaining the pressure. The knob mechanism of the external device rotates the spring lock 260 to achieve a locking state of the connection part 232 of the carrier 100 and the cover 230. The contoured pressure block 240 abuts against the second element 2 due to the elastic force of the elastic member 250. The center of gravity of the contoured pressure block 240 coincides with the geometric center of the second element 2, so the second element 2 will not be displaced during the transportation process. The pressure-holding protrusion 210 is used to abut against the edge of the pressure-bearing surface 11 of the product to be pressurized to provide pressing force to the product to be pressurized through the edge of the pressure-bearing surface 11. Since the hollow cavity 12 of the product to be pressurized is usually arranged in the middle area of ​​the product to be pressurized, the pressure-holding protrusion 210 has less contact with the part of the pressure-bearing surface 11 that surrounds the hollow cavity 12, or even no contact, thereby reducing the probability of the product to be pressurized being crushed or deformed, reducing the scrap rate of the surface mounting process, and improving the reliability of pressurizing the product to be pressurized. At the same time, the reaction force when the second element 2 is subjected to force and the force output by the contoured pressing block 240 utilize the elastic characteristics of the elastic member 250. When the elastic member 250 is compressed, it will continue to act on the second element 2, thereby achieving the effect of continuous pressure on the second element 2.

[0069] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pressure-maintaining fixture, characterized in that: include: A carrier (100), the carrier (100) being used to support a product to be pressure-maintained, the product to be pressure-maintained being a hollow structure and comprising a pressure-bearing surface (11); A pressure-maintaining component (200) is slidably connected to the carrier (100) so that the pressure-maintaining component (200) can move toward or away from the carrier (100), and the pressure-maintaining component (200) is provided with a pressure-maintaining protrusion (210), and the pressure-maintaining protrusion (210) is configured to abut against the edge of the pressure-bearing surface (11).

2. The pressure-maintaining jig according to claim 1, characterized in that: The pressure-maintaining protrusion (210) is annular, and the pressure-maintaining protrusion (210) is surrounded to form a contoured groove (220), the shape of the contoured groove (220) matching the shape of the hollow cavity (12) of the product to be pressure-maintained.

3. The pressure-maintaining jig according to claim 1, characterized in that: There are a plurality of pressure-maintaining protrusions (210), and the plurality of pressure-maintaining protrusions (210) are arranged at intervals along the circumference of the pressure-maintaining component (200). The plurality of pressure-maintaining protrusions (210) are arranged to form a contoured space, and the shape of the contoured space matches the shape of the hollow cavity (12) of the product to be pressure-maintained.

4. The pressure-maintaining jig according to claim 1, characterized in that: The pressure maintaining component (200) comprises: a cover plate (230), the cover plate (230) being slidably connected to the carrier (100); A contoured pressing block (240), the contoured pressing block (240) being arranged on a side of the cover plate (230) facing the carrier (100) and being slidably connected to the cover plate (230); the pressure-maintaining protrusion (210) being connected to a side of the contoured pressing block (240) facing away from the cover plate (230); An elastic member (250) is provided between the cover plate (230) and the contoured pressing block (240), and the elastic member (250) always has a tendency to drive the contoured pressing block (240) to move in a direction away from the cover plate (230).

5. The pressure-maintaining jig according to claim 4, characterized in that: One of the profiling pressing block (240) and the cover plate (230) is provided with a linearly extending guide groove (231), and the other is provided with a guide structure (241) that slidably cooperates with the guide groove (231); when the profiling pressing block (240) moves toward or away from the cover plate (230), the guide structure (241) slides along the extension direction of the guide groove (231).

6. The pressure-maintaining jig according to claim 4, characterized in that: The center of gravity of the contoured pressing block (240) is configured such that a straight line passing through the center of gravity of the contoured pressing block (240) and the center (13) of the product to be pressure-maintained extends along a first direction (X), and the first direction (X) is a sliding direction of the pressure-maintaining assembly (200) relative to the carrier (100).

7. The pressure-maintaining jig according to claim 4, characterized in that: The contoured pressing block (240) and the pressure-maintaining protrusion (210) are an integrally formed structure.

8. The pressure-maintaining jig according to claim 4, characterized in that: The cross-sectional shape of the contoured pressing block (240) is the same as or similar to the cross-sectional shape of the product to be pressure maintained.

9. The pressure-maintaining jig according to claim 4, characterized in that: The cover plate (230) includes a connecting portion (232) and an assembly portion (233) connected thereto. The connecting portion (232) is slidably connected to the carrier (100), and the connecting portion (232) is provided with an avoidance hole (2321). The assembly portion (233) protrudes from the connecting portion (232) in a direction away from the carrier (100) and is arranged opposite to the avoidance hole (2321). The contoured pressing block (240) is slidably connected to the assembly portion (233), and the elastic member (250) is arranged between the assembly portion (233) and the contoured pressing block (240).

10. The pressure maintaining jig according to claim 1, characterized in that: The surface of the pressure-maintaining protrusion (210) that is in contact with the pressure-bearing surface (11) is provided with a step structure (211), and the step structure (211) is used to cooperate with the step (14) of the product to be pressure-maintained.

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