Pressure maintaining device and pressure maintaining method

Abstract

The invention discloses a pressure maintaining device and a pressure maintaining method, and relates to the technical field of pressure maintaining. The pressure maintaining device comprises a base; the supporting pressing blocks are stacked on the base in the first direction and can support a workpiece to be pressed; the side pressing assembly and the supporting pressing block are arranged on the same side of the base; the side pressing assembly comprises a side pressing block, a first elastic mechanism and a push plate which are distributed in the second direction. The side pressing block is located between the supporting pressing block and the push plate, and the side pressing block and the push plate are connected through a first elastic mechanism. The push plate can drive the side pressing block to reciprocate in the second direction through the first elastic mechanism. The jacking assembly is arranged on the side, away from the base, of the supporting pressing block; the jacking assembly comprises a jacking block, a second elastic mechanism and a cover plate which are distributed in the first direction; the jacking block is located between the supporting pressing block and the cover plate, and the jacking block and the cover plate are connected through a second elastic mechanism. The cover plate can drive the jacking block to reciprocate in the first direction through the second elastic mechanism. The first direction is different from the second direction. And irregular workpieces can be subjected to pressure-maintaining bonding.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of pressure maintaining, in particular to a pressure maintaining device and a pressure maintaining method. BACKGROUND

[0002] For electronic devices such as watches, bracelets, earphones, etc., in order to ensure the reliability and air tightness of the products, accessories such as decorative parts, sealing parts, etc. can be bonded on the products, and a positive pressure maintaining process can be usually used to make the bonding of the accessories more firm, but for irregularly shaped products, the existing pressure maintaining device is difficult to be applicable, and the bonding effect needs to be improved. SUMMARY

[0003] The present disclosure provides a pressure maintaining device and a pressure maintaining method, which can perform pressure maintaining bonding on irregular workpieces and improve the bonding effect.

[0004] According to one aspect of the present disclosure, a pressure maintaining device is provided, comprising:

[0005] a base;

[0006] a support pressing block stacked on the base along a first direction, used for supporting a workpiece to be pressed;

[0007] a side pressing assembly arranged on the same side of the base as the support pressing block; the side pressing assembly comprises side pressing blocks distributed along a second direction, a first elastic mechanism and a push plate; the side pressing blocks are located between the support pressing block and the push plate, and the side pressing blocks and the push plate are connected through the first elastic mechanism; the push plate can drive the side pressing blocks to reciprocate along the second direction through the first elastic mechanism to press the workpiece;

[0008] a top pressing assembly arranged on a side of the support pressing block away from the base; the top pressing assembly comprises top pressing blocks distributed along the first direction, a second elastic mechanism and a cover plate; the top pressing blocks are located between the support pressing block and the cover plate, and the top pressing blocks and the cover plate are connected through the second elastic mechanism; the cover plate can drive the top pressing blocks to reciprocate along the first direction through the second elastic mechanism to press the workpiece;

[0009] the first direction and the second direction are different.

[0010] In an exemplary embodiment of the present disclosure, the pressure maintaining device further comprises:

[0011] a first support arranged on the same side of the base as the support pressing block;

[0012] the side pressing assembly further comprises a driving rod, the driving rod is rotationally connected with the first support, and passes through the push plate along the second direction and is threadedly connected with the push plate.

[0013] In one exemplary embodiment of this disclosure, the drive rod is provided with two stops distributed along the axial direction, and the push plate is located between the two stops.

[0014] In one exemplary embodiment of this disclosure, the pressure-holding device further includes:

[0015] A side limiting assembly includes a side limiting member disposed on the first bracket and movable at least between a first position and a second position. When the side limiting member is in the first position, the side limiting member at least partially blocks the side of the push plate away from the side pressure block. When the side limiting member is in the second position, the side limiting member disengages from the push plate.

[0016] In one exemplary embodiment of this disclosure, the first bracket includes a fixing part and two clamping parts connected to the fixing part. The fixing part is fixed to the base, and the two clamping parts are spaced apart along the first direction. The drive rod is rotatably connected to the fixing part.

[0017] The side limiting member has a first hook portion. The side limiting member is clamped between the two clamping portions and is hinged to the clamping portions by a first hinge shaft extending along the first direction, so that the side limiting member can rotate between the first position and the second position. When the side limiting member is in the first position, the first hook portion hooks onto the push plate from the side away from the side pressure block. When it is in the second position, the first hook portion disengages from the push plate.

[0018] In one exemplary embodiment of this disclosure, the side limiting member includes a first end and a second end, the first hook portion is located at the first end, and the first hinge shaft is located between the first end and the second end of the side limiting member; the side limiting assembly further includes:

[0019] A first elastic reset member is disposed between the two clamping portions and connects the second end of the fixing portion and the limiting member. The first elastic reset member applies a pushing force to the second end of the side limiting member.

[0020] In one exemplary embodiment of this disclosure, the pressure-holding device further includes:

[0021] The second bracket is located on the same side of the base as the supporting block; the cover plate is supported on the second bracket and can move along the first direction.

[0022] In one exemplary embodiment of this disclosure, the second bracket is provided with a stop structure; the pressure-holding device further includes:

[0023] A first top limiting assembly includes a first top limiting member connected to the cover plate and extending toward the base; the first top limiting member is movable between at least a third position and a fourth position, and when in the third position, the first top limiting member at least partially blocks the side of the stop structure near the base, and when in the fourth position, the first top limiting member disengages from the stop structure.

[0024] In one exemplary embodiment of this disclosure, the first top limiting member has a second hook at one end near the base, and the first top limiting member is hinged to the cover plate via a second hinge shaft extending along the second direction, so that the first top limiting member can rotate between the third position and the fourth position. When the first top limiting member is in the third position, the second hook is hooked to the stop structure from the side of the stop structure away from the base, and when it is in the fourth position, the second hook is disengaged from the stop structure.

[0025] In one exemplary embodiment of this disclosure, the first top limiting member includes a third end and a fourth end distributed along a first direction, the second hook portion is located at the third end, and the second hinge shaft is located between the third end and the fourth end of the first top limiting member; the first top limiting assembly further includes:

[0026] The second elastic reset member is connected to the fourth end of the cover plate and the first top limiting member, and the second elastic reset member applies a thrust to the fourth end of the first top limiting member.

[0027] In one exemplary embodiment of this disclosure, the pressure-holding device further includes:

[0028] The second top limiting member is disposed between the cover plate and the first bracket;

[0029] A third elastic mechanism connects the cover plate and the second top limiting member; the cover plate can drive the second top limiting member to reciprocate along the first direction through the third elastic mechanism.

[0030] In one exemplary embodiment of this disclosure, the second bracket has a plurality of limiting posts extending along the first direction on the surface near the cover plate, and the outer peripheral surface of the cover plate slides in cooperation with the limiting posts.

[0031] In one exemplary embodiment of this disclosure, the first elastic mechanism includes a first guide rod and a first elastic element. The first guide rod is disposed along the second direction and connected to the side pressure block and the push plate, and can slide relative to one of the side pressure block and the push plate. The first elastic element is sleeved outside the first guide rod and clamped between the side pressure block and the push plate.

[0032] In one exemplary embodiment of this disclosure, the second elastic mechanism includes a second guide rod and a second elastic member. The second guide rod is disposed along the first direction and connected to the top pressing block and the cover plate, and can slide relative to one of the top pressing block and the cover plate. The second elastic member is sleeved outside the second guide rod and clamped between the top pressing block and the cover plate.

[0033] In one exemplary embodiment of this disclosure, the third elastic mechanism includes a third guide rod and a third elastic member. The third guide rod is disposed along the first direction and connected to the second top limiting member and the cover plate, and can slide relative to one of the second top limiting member and the cover plate. The third elastic member is sleeved outside the third guide rod and clamped between the second top limiting member and the cover plate.

[0034] In one exemplary embodiment of this disclosure, at least one of the support block, the side block, and the top block is provided with a stress detection element, which is used to detect the stress of the workpiece.

[0035] In one exemplary embodiment of this disclosure, the first direction and the second direction are perpendicular.

[0036] In one exemplary embodiment of this disclosure, the pressure-holding device further includes:

[0037] A side drive device is used to drive the push plate to reciprocate along the second direction;

[0038] A top drive device is used to drive the cover plate to reciprocate along the first direction.

[0039] According to one aspect of this disclosure, a pressure-holding method is provided for the pressure-holding device described in any one of the above claims, the pressure-holding method comprising:

[0040] Place the workpiece on the support block and attach the accessories to the workpiece surface with adhesive.

[0041] The top pressure block is moved toward the workpiece in the first direction to apply pressure to the accessory and the workpiece;

[0042] The side pressure block is moved toward the workpiece along the second direction to apply pressure to the accessory and the workpiece;

[0043] After maintaining pressure on the attachment and the workpiece for a specified time, remove the workpiece and the attachments bonded to it.

[0044] The pressure-holding device and method disclosed herein can compress a workpiece and its attachments from two different directions (a first direction and a second direction) using side pressure blocks and top pressure blocks. By controlling the movement position of the push plate and cover plate, the stress on the workpiece can be adjusted, thereby achieving pressure-holding bonding. For workpieces with complex shapes such as headphones, the support pressure block, side pressure block, and top pressure block can be limited from three areas to keep the workpiece stable and ensure that pressure can be applied to the attachments. At the same time, the first elastic mechanism can buffer between the push plate and the side pressure block, and the second elastic mechanism can buffer between the push plate and the side pressure block to avoid damage to the workpiece. Furthermore, the first and second elastic mechanisms can use their own elasticity to maintain the stability of the stress on the workpiece.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0047] Figure 1 This is a schematic diagram of one embodiment of the pressure-holding device disclosed herein from one perspective.

[0048] Figure 2 This is a schematic diagram of one embodiment of the pressure-holding device disclosed herein from another perspective.

[0049] Figure 3 This is a schematic diagram of the pressure block and the workpiece in one embodiment of the pressure-holding device of this disclosure.

[0050] Figure 4 This is a schematic diagram of the pressure block in one embodiment of the pressure-holding device of this disclosure.

[0051] Figure 5 This is a schematic diagram of the first bracket, the second bracket, the base, and the supporting pressure block in one embodiment of the pressure-holding device of this disclosure.

[0052] Figure 6 This is a schematic diagram of the side pressure assembly in one embodiment of the pressure-holding device of this disclosure.

[0053] Figure 7 This is a schematic diagram of the side limiting component in one embodiment of the pressure holding device of this disclosure.

[0054] Figure 8 This is a schematic diagram of the top limiting component in one embodiment of the pressure holding device of this disclosure. Attached image description:

[0056] 1. Base;

[0057] 2. Support block; 21. Bottom recessed cavity;

[0058] 3. Side pressure assembly; 31. Side pressure block; 311. Side concave cavity; 32. First elastic mechanism; 321. First guide rod; 322. First elastic element; 323. First limiting nut; 33. Push plate;

[0059] 4. Top pressing assembly; 41. Top pressing block; 411. Top recess cavity; 42. Second elastic mechanism; 421. Second guide rod; 422. Second elastic element; 423. Second limiting nut; 43. Cover plate; 431. First receiving groove;

[0060] 5. First support; 51. Fixing part; 52. Clamping part;

[0061] 6. Drive lever;

[0062] 7. Stop components;

[0063] 8. Side limiting assembly; 81. Side limiting member; 811. First hook; 82. First hinge shaft; 83. First elastic reset member; 84. Limiting shaft;

[0064] 9. Second bracket; 91. Limiting post; 92. Second receiving slot;

[0065] 10. Stop structure;

[0066] 11. First top limiting assembly; 111. First top limiting member; 112. Second hook; 113. Second elastic reset member;

[0067] 12. Second top limiting component;

[0068] 13. Third elastic mechanism; 131. Third guide rod; 132. Third elastic element; 133. Third limit nut;

[0069] 01. Workpiece. Detailed Implementation

[0070] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0071] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0072] This disclosure provides a pressure-holding device for providing pressure when an accessory is bonded to a workpiece. The workpiece can be wearable devices such as watches, bracelets, headphones, glasses, rings, and virtual reality devices; electronic devices such as table lamps and speakers; or components of vehicles, furniture, and both. The accessory can be a decorative piece or a sealant, which can be bonded to the workpiece with adhesive. To ensure a strong bond, the pressure-holding device presses the accessory onto the workpiece and maintains a certain pressure for a specified duration, thereby achieving a firm bond that is not easily loosened.

[0073] like Figures 1-8 As shown, the pressure-holding device of this embodiment may include a base 1, a support block 2, a side pressure assembly 3, and a top pressure assembly 4, wherein:

[0074] The support blocks 2 are stacked on the base 1 along the first direction Z to support the workpiece 01 to be pressed.

[0075] The side pressure assembly 3 and the support pressure block 2 are located on the same side of the base 1; the side pressure assembly 3 includes a side pressure block 31 distributed along the second direction X, a first elastic mechanism 32 and a push plate 33; the side pressure block 31 is located between the support pressure block 2 and the push plate 33, and the side pressure block 31 and the push plate 33 are connected by the first elastic mechanism 32; the push plate 33 can drive the side pressure block 31 to reciprocate along the second direction X through the first elastic mechanism 32 to apply pressure to the workpiece 01.

[0076] The pressing assembly 4 is located on the side of the supporting block 2 away from the base 1. The pressing assembly 4 includes a pressing block 41 distributed along the first direction Z, a second elastic mechanism 42, and a cover plate 43. The pressing block 41 is located between the supporting block 2 and the cover plate 43, and the pressing block 41 and the cover plate 43 are connected by the second elastic mechanism 42. The cover plate 43 can drive the pressing block 41 to reciprocate along the first direction Z through the second elastic mechanism 42 to apply pressure to the workpiece 01. The first direction Z is different from the second direction X.

[0077] The pressure-holding device of this embodiment can compress the workpiece 01 and its accessories from two different directions (first direction Z and second direction X) through the side pressure block 31 and the top pressure block 41. By controlling the movement position of the push plate 33 and the cover plate 43, the stress on the workpiece 01 can be adjusted, thereby achieving pressure-holding bonding. For workpieces 01 with complex shapes such as headphones, the support pressure block 2, the side pressure block 31 and the top pressure block 41 can be limited from three areas to keep the workpiece 01 stable and ensure that pressure can be applied to the accessories. At the same time, the first elastic mechanism 32 can buffer between the push plate 33 and the side pressure block 31, and the second elastic mechanism 42 can buffer between the push plate 33 and the side pressure block 31 to avoid damage to the workpiece 01. The first elastic mechanism 32 and the second elastic mechanism 42 can use their own elasticity to maintain the stability of the stress on the workpiece 01.

[0078] The pressure-holding device of this disclosure will now be described in detail:

[0079] like Figure 3 and Figure 5 As shown, the base 1 can be a plate-like structure, serving a load-bearing function. The support block 2, side pressure assembly 3, and top pressure assembly 4 can all be mounted on the base 1. The support block 2 can be stacked on the base 1 along the first direction Z. The support block 2 and the base 1 can be an integral structure or independent structures, and the two can be fixedly connected. The workpiece 01 to be pressurized can be placed on the support block 2. Furthermore, the support block 2 can have a recessed cavity 21 that is recessed into the base 1. The shape of the recessed cavity 21 matches the workpiece 01, allowing the workpiece 01 to be placed inside and fitted against the recessed cavity 21. While supporting the workpiece 01, the support block 2 can also limit the position of the workpiece 01 through the recessed cavity 21. In addition, the depth of the recessed cavity 21 is less than the thickness of the workpiece 01 in the first direction Z, preventing the workpiece 01 from completely sinking into the recessed cavity 21.

[0080] Taking workpiece 01 as an in-ear headphone as an example, in some embodiments of this disclosure, the headphone has an earbud portion and a tail portion connected to the earbud portion, and the earbud portion can be placed inside the user's outer ear. The support block 2 may include a first support portion and a second support portion stacked on the side of the first support portion away from the base 1, and the second support portion does not completely cover the first support portion, thereby forming a stepped structure. The first support portion and the second support portion are provided with a bottom cavity 21 for placing different parts of the headphone. The earbud portion of the headphone can be placed in the bottom cavity 21 of the first support portion, and the tail portion of the headphone can be placed in the bottom cavity 21 of the second support portion. The first support portion can support the earbud portion, and the second support portion can support the tail portion, so that the support block 2 can better match and fit the headphone.

[0081] like Figure 6As shown, the side pressure component 3 and the support pressure block 2 are located on the same side of the base 1, and the side pressure component 3 may include a side pressure block 31, a first elastic mechanism 32 and a push plate 33 distributed along the second direction X. The second direction X is different from the first direction Z, and the two can form a certain angle. For example, the second direction X can be perpendicular to the first direction Z. In some embodiments, the base 1 is a flat plate structure, the first direction Z can be a direction perpendicular to the base 1, and the second direction X can be a direction parallel to the base 1.

[0082] The side pressure block 31 is located between the support pressure block 2 and the push plate 33, and the side pressure block 31 and the push plate 33 are connected by the first elastic mechanism 32. The push plate 33 can drive the side pressure block 31 to reciprocate along the second direction X through the first elastic mechanism 32, so that it can move closer to or further away from the support pressure block 2. When it is close to the support pressure block 2, the side pressure block 31 can apply pressure to the workpiece 01 on the support pressure block 2, that is, apply pressure to the workpiece 01 in the second direction X.

[0083] The side pressure block 31 may have a side recess 311 on its surface facing the supporting pressure block 2. The shape of the side recess 311 matches the workpiece 01, allowing the workpiece 01 to fit snugly against the side recess 311, increasing the stress-bearing area of ​​the workpiece 01 and promoting more uniform stress distribution. Simultaneously, to avoid interference between the side pressure block 31 and the supporting pressure block 2, the area of ​​the bottom recess 21 facing the side pressure block 31 may be an open structure, exposing the surface of the workpiece 01 in the second direction X. The side recess 311 can then contact the workpiece 01 through this open structure.

[0084] When the side pressure block 31 contacts the workpiece 01, if the push plate 33 continues to approach the workpiece 01, the first elastic mechanism 32 can be compressed, thereby applying a force toward the workpiece 01 to the side pressure block 31. That is, the first elastic element 322 can generate a force that hinders the side pressure block 31 and the push plate 33 from moving toward each other. This can be buffered by the first elastic mechanism 32, which is beneficial to protect the side pressure block 31 and the workpiece 01. At the same time, after the push plate 33 moves into place, the elastic force of the first elastic mechanism 32 can continuously apply pressure to the workpiece 01, which is beneficial to make the workpiece 01 and its accessories stable under force.

[0085] In addition, when the side pressure block 31 applies pressure to the workpiece 01, the stress direction of the workpiece 01 can be along the second direction X or approximately along the second direction X (the angle between the stress block 31 and the second direction X is not greater than 15°). That is, the moving direction of the side pressure block 31 is the same as or approximately the same as the direction of the force applied to the workpiece 01, so as to avoid wear of the side pressure block 31 due to inconsistent directions.

[0086] like Figure 6As shown, in some embodiments of this disclosure, the first elastic mechanism 32 may include a first guide rod 321 and a first elastic element 322. The first guide rod 321 may be arranged along a second direction X and connected to the side pressure block 31 and the push plate 33. It may slide relative to one of the side pressure block 31 and the push plate 33 along the second direction X. For example, the first guide rod 321 may extend through the side pressure block 31 and the push plate 33, and the first guide rod 321 is threadedly connected to the side pressure block 31 and slidably engaged with the push plate 33. A first limiting nut 323 may be provided at one end of the first guide rod 321 extending through the push plate 33 to prevent the push plate 33 from dislodging from the first guide rod 321. The first elastic element 322 is sleeved on the first guide rod 321 and clamped between the side pressure block 31 and the push plate 33. The first elastic element 322 may be a spring or a rubber sleeve or other elastic device. When the push plate 33 moves toward the workpiece 01, the push plate 33 can slide relative to the first guide rod 321, thereby compressing the first elastic element 322 and applying pressure to the side pressure block 31 through the first elastic element 322.

[0087] Of course, in other embodiments of this disclosure, the first elastic mechanism 32 may not be provided with the first guide rod 321, and the push plate 33 and the side pressure block 31 may be directly connected by the first elastic element 322, as long as the required force can be provided.

[0088] The following is an exemplary description of how the side pressure block 31 and the push plate 33 are moved:

[0089] like Figure 5 and Figure 6 As shown, in some embodiments of this disclosure, the pressure-holding device further includes a first bracket 5. The first bracket 5 can be located on the same side of the base 1 as the supporting pressure block 2, and can be fixed to the base 1 by means of snap-fit, welding, or screw connection, or can be integrally formed with the base 1. The first bracket 5 can be distributed along the third direction Y with the push plate 33, and the third direction Y can be perpendicular to the second direction X. At the same time, the side pressure assembly 3 can also include a drive rod 6, which is rotatably connected to the first bracket 5, passes through the push plate 33 along the second direction X, and is threadedly connected to the push plate 33. The push plate 33 and the drive rod 6 can form a screw-nut mechanism, and by rotating the drive rod 6, the push plate 33 can be moved back and forth along the second direction X.

[0090] Furthermore, such as Figure 7As shown, in some embodiments, two axially distributed stop members 7 can be provided on the drive rod 6. The stop members 7 protrude from the outer periphery of the drive rod 6, and the push plate 33 is located between the two stop members 7. Thus, the movement range of the push plate 33 can be limited by the stop members 7, preventing the push plate 33 from dislodging from the drive rod 6. For ease of installation and disassembly, the stop member 7 can be a sleeve with a flange, which can be sleeved on the drive rod 6 and can be detachably connected to the drive rod 6 by means of threaded connection or key connection. When the push plate 33 moves to the position blocked by the stop member 7, the top pressure block 41 moves to the position closest to or farthest from the workpiece 01. By controlling the distance between the push plate 33 and the workpiece 01, the pressure of the top pressure block 41 on the workpiece 01 can be adjusted.

[0091] In some embodiments of this disclosure, two drive rods 6 may be provided, and both drive rods 6 are connected to the push plate 33 in the manner described above with a screw and nut structure. The push plate 33 can be moved by rotating the two drive rods 6, and the two drive rods 6 can prevent the push plate 33 from rotating with the rotation of the drive rods 6, so that it can only move in a straight line. Of course, by making the push plate 33 slide with the base 1, the push plate 33 can also be prevented from rotating with the rotation of the drive rods 6.

[0092] In some embodiments of this disclosure, such as Figures 5-7 As shown, the pressure-holding device also includes a side limiting assembly 8, which can limit the push plate 33 in the second direction X. For example, the side limiting assembly 8 may include a side limiting member 81, which may be disposed on the first bracket 5 and can move at least between a first position and a second position. When in the first position, the side limiting member 81 at least partially blocks the side of the push plate 33 away from the side pressure block 31, preventing the push plate 33 from moving away from the side pressure block 31, thereby locking the position of the side pressure block 31 by the push plate 33. When in the second position, the side limiting member 81 disengages from the push plate 33, and the push plate 33 can move along the second direction X.

[0093] Furthermore, in some embodiments, the first bracket 5 may include a fixing part 51 and two clamping parts 52 connected to the fixing part 51. The fixing part 51 is fixed to the base 1 by means of snap-fit, welding, or screw connection, or it may be integrally formed with the base 1. The clamping parts 52 are located on the side of the fixing part 51 away from the push plate 33. The two clamping parts 52 may be distributed at intervals along the first direction Z, and the clamping part 52 closer to the base 1 may be fixed to the base 1. The aforementioned drive rod 6 may be rotatably connected to the fixing part 51.

[0094] The side limiting member 81 is clamped between two clamping portions 52 and hinged to the two clamping portions 52 via a first hinge shaft 82 extending in the first direction Z, allowing the side limiting member 81 to rotate between a first position and a second position. Simultaneously, the side limiting member 81 has a first hook portion 811 extending beyond the two clamping portions 52, which bends towards the push plate 33. When the side limiting member 81 is in the first position, the first hook portion 811 hooks onto the push plate 33 from the side away from the side pressure block 31, at which point the push plate 33 is in a locked state. When in the second position, the first hook portion 811 disengages from the push plate 33, at which point the push plate 33 is in an unlocked state. The rotation of the side limiting member 81 can be achieved manually, or it can be controlled by a drive device such as a motor.

[0095] Furthermore, such as Figures 5-7 As shown, the side limiting member 81 may include a first end and a second end. A first hook portion 811 is located at the first end, and a first hinge shaft 82 is located between the first end and the second end of the side limiting member 81, such that both the first end and the second end are free ends and can extend out of the clamping portion 52. The side limiting assembly 8 also includes a first elastic reset member 83, which may be disposed between the two clamping portions 52 and connects the fixing portion 51 and the second end of the side limiting member 81. The first elastic reset member 83 can apply a pushing force to the second end of the side limiting member 81, that is, a force acting away from the fixing portion 51, so that the first hook portion 811 located at the first end tends to move towards the push plate 33. Without applying an external force, the first elastic reset member 83 can keep the side limiting member 81 always in the first position, and can only rotate to the second position under the action of an external force. The first elastic reset member 83 may be an elastic member made of elastic material such as a spring or rubber, which can be compressed between the fixing portion 51 and the second end of the side limiting member 81.

[0096] Furthermore, such as Figures 5-7 As shown, a limiting shaft 84 may also be provided between the two clamping parts 52. It may be located on the side of the side limiting member 81 away from the fixed part 51. When the side limiting member 81 rotates to the first position under the action of the elastic force of the first elastic reset member 83, the side limiting member 81 is blocked by the limiting shaft 84 and will not continue to rotate. This avoids relying on the push plate 33 to block the first hook part 811 to limit the side limiting member 81 from continuing to move, which helps to prevent damage to the first hook part 811.

[0097] In addition, in some embodiments, the first bracket 5 and the side limiting component 8 described above can be a limiting unit. There can be two limiting units, which are symmetrically distributed on both sides of the push plate 33 along the third direction Y, so as to ensure that the force on both sides of the push plate 33 is balanced and not easily deviated.

[0098] The pressure-holding device may also include a side drive device, which can drive the push plate 33 to reciprocate along the second direction X. For example, in some embodiments of this disclosure, the side drive device can be connected to the drive rod 6 and can drive the drive rod 6 to rotate, thereby driving the push plate 33 to move. The side drive device can be a motor or other device capable of outputting rotational motion. In other embodiments of this disclosure, the push plate 33 can also be slidably mounted on the base 1, and the side drive device can be directly connected to the push plate 33 and can drive the push plate 33 to move along the second direction X. The side drive device can be a cylinder or a hydraulic cylinder, or a linear motor, etc., as long as it can output linear motion.

[0099] like Figure 1 and Figure 2 As shown, the top pressing assembly 4 is located on the side of the support block 2 away from the base 1, and the top pressing assembly 4 includes a top pressing block 41, a second elastic mechanism 42, and a cover plate 43 distributed along the first direction Z. The top pressing block 41 is located between the support block 2 and the cover plate 43, and the top pressing block 41 and the cover plate 43 are connected by the second elastic mechanism 42; the cover plate 43 can drive the top pressing block 41 to reciprocate along the first direction Z through the second elastic mechanism 42, so that it can move closer to or further away from the support block 2, and when it is close to the support block 2, the top pressing block 41 can apply pressure to the workpiece 01 on the support block 2, that is, apply pressure to the workpiece 01 in the first direction Z.

[0100] like Figure 3 and Figure 4 As shown, the top pressure block 41 may have a top recess 411 on its surface facing the supporting pressure block 2. The shape of the top recess 411 matches the workpiece 01, allowing the workpiece 01 to fit against the top recess 411, increasing the stress-bearing area of ​​the workpiece 01 and promoting more uniform stress distribution. The bottom recess 21, side recess 311, and top recess 411 can cover most of the surface area of ​​the workpiece 01, meaning that the area of ​​the workpiece 01 that fits against the bottom recess 21, side recess 311, and top recess 411 is greater than 50% of the surface area of ​​the workpiece 01. Furthermore, the bottom recess 21, side recess 311, and top recess 411 can completely cover the surface of the workpiece 01, increasing the stress-bearing area, ensuring uniform stress distribution on the surface of the workpiece 01, and making the attachment more firmly bonded.

[0101] When the top pressing block 41 contacts the workpiece 01, if the cover plate 43 continues to approach the workpiece 01, the second elastic mechanism 42 can be compressed, thereby applying a force toward the workpiece 01 to the top pressing block 41. That is, the second elastic element 422 can generate a force that hinders the top pressing block 41 and the cover plate 43 from moving toward each other. This can be buffered by the second elastic mechanism 42, which is beneficial to protect the top pressing block 41 and the workpiece 01. At the same time, after the cover plate 43 moves into place, the elastic force of the second elastic mechanism 42 can continuously apply pressure to the workpiece 01, which is beneficial to make the workpiece 01 and its accessories stable under force.

[0102] Furthermore, when the top pressure block 41 applies pressure to the workpiece 01, the stress direction of the workpiece 01 can be along or approximately along the first direction Z (the angle between the top pressure block 41 and the first direction Z is no greater than 15°). That is, the moving direction of the top pressure block 41 is the same as or approximately the same as the direction of force applied to the workpiece 01, avoiding wear of the top pressure block 41 due to inconsistent directions. At the same time, under the combined action of the supporting pressure block 2, the side pressure block 31 and the top pressure block 41, force can be continuously applied to the workpiece 01 to adhere the attachment to the workpiece 01. Using multiple pressure blocks allows pressure to be applied from multiple directions, which is suitable for the pressure holding process of workpieces 01 with irregular shapes and other complex shapes.

[0103] like Figure 2 As shown, in some embodiments of this disclosure, the second elastic mechanism 42 may include a second guide rod 421 and a second elastic element 422. The second guide rod 421 may be arranged along a first direction Z and connected to the top pressing block 41 and the cover plate 43, and may slide along a second direction X relative to one of the top pressing block 41 and the cover plate 43. For example, the second guide rod 421 may extend through the top pressing block 41 and the cover plate 43, and the second guide rod 421 is threadedly connected to the top pressing block 41 and slidably engaged with the cover plate 43. A second limiting nut 423 may be provided at one end of the second guide rod 421 extending through the cover plate 43 to prevent the push plate 33 from dislodging from the second guide rod 421. The second elastic element 422 is sleeved on the second guide rod 421 and clamped between the top pressing block 41 and the cover plate 43. The second elastic element 422 may be a spring or a rubber sleeve or other elastic device.

[0104] When the cover plate 43 moves toward the workpiece 01, the cover plate 43 can slide relative to the second guide rod 421, thereby compressing the second elastic element 422 and applying pressure to the side pressure block 31 through the second elastic element 422.

[0105] Of course, in other embodiments of this disclosure, the second elastic mechanism 42 may not be provided with the second guide rod 421, and the second elastic element 422 may be used to directly connect the cover plate 43 and the top pressure block 41, as long as the required force can be provided.

[0106] like Figure 2 and Figure 5 As shown, in some embodiments of this disclosure, the pressure-holding device further includes a second bracket 9. The second bracket 9 may be located on the same side of the base 1 as the supporting pressure block 2, and may be fixed to the base 1 by means of snap-fit, welding, or screw connection. Of course, the second bracket 9 may also be integrally formed with the base 1. The second bracket 9 and the supporting pressure block 2 may be distributed along the third direction Y, and the second bracket 9 may be located on the side of the first bracket 5 away from the supporting pressure block 2, that is, on the outer side of the first bracket 5.

[0107] The height of the second bracket 9 is greater than that of the support block 2, the push plate 33, and the first bracket 5. The cover plate 43 can be supported on the second bracket 9 and can move along the first direction Z. When the cover plate 43 moves towards the base 1 and contacts the second bracket 9, it will be blocked by the second bracket 9. At this time, the top pressure block 41 also moves to the position closest to the base 1. At this time, the pressure of the top pressure block 41 on the workpiece 01 is the greatest. By controlling the distance between the cover plate 43 and the second bracket 9, the pressure of the top pressure block 41 on the workpiece 01 can be adjusted. When the cover plate 43 moves to a certain position in the direction away from the base 1, the cover plate 43 separates from the second bracket 9, and the top pressure block 41 separates from the workpiece 01. At this time, the workpiece 01 is no longer subjected to the pressure of the top pressure block 41.

[0108] like Figure 1 and Figure 2 As shown, in some embodiments of this disclosure, the second bracket 9 has a plurality of limiting posts 91 extending along the first direction Z on its surface near the cover plate 43. The outer peripheral surface of the cover plate 43 can slide with the limiting posts 91. When the cover plate 43 overlaps the second bracket 9, the limiting posts 91 can limit the position of the cover plate 43. For example, there are two second brackets 9, which are symmetrically distributed on both sides of the support block 2 along the third direction Y. Each second bracket 9 has two limiting posts 91 on its top surface away from the base 1. The two second brackets 9 have a total of four limiting posts 91. The two limiting posts 91 on the same second bracket 9 can be spaced apart along the second direction X. The outer peripheral surface of the cover plate 43 has four concave notches. Each limiting post 91 is inserted into each notch and slides with the notch. Thus, the position of the cover plate 43 can be limited by the four limiting posts 91. Within the height range of the limiting posts 91, the limiting posts 91 can guide the movement of the cover plate 43 along the first direction Z.

[0109] In addition to the second bracket 9 mentioned above limiting the cover plate 43 of the top pressing assembly 4, the top pressing assembly 4 can also be limited in other ways, as illustrated below:

[0110] like Figure 1 , Figure 2 and Figure 8As shown, the second bracket 9 may be provided with a stop structure 10, which may be a protrusion structure provided on the second bracket 9. The top pressing assembly 4 also includes a first top limiting assembly 11, which may include a first top limiting member 111. The first top limiting member 111 is connected to the cover plate 43 and extends toward the base 1, so that the first top limiting member 111 extends toward the base 1 toward the cover plate 43 in the first direction Z. The first top limiting member 111 can move between at least the third position and the fourth position. When it is in the third position, the first top limiting member 111 is at least partially blocked by the stop structure 10 on the side near the base 1. At this time, the top plate cannot move away from the second bracket 9, and is locked in the first direction Z. This is beneficial to maintain a stable position and prevent loosening during pressure holding. When it is in the fourth position, the first top limiting member 111 is disengaged from the stop structure 10. At this time, the first top limiting member 111 can move in the first direction Z. By controlling the first top limiting member 111, the cover plate 43 can be locked and unlocked, thereby locking and unlocking the top pressing block 41.

[0111] Furthermore, in some embodiments, the first top limiting member 111 is located on the side of the second bracket 9 away from the supporting pressure block 2, i.e., on the outer side of the second bracket 9, and the stop structure 10 protrudes outward from the second bracket 9. Simultaneously, the end of the first top limiting member 111 near the base 1 has a second hook portion 112 that bends towards the second bracket 9, and the first top limiting member 111 is hinged to the cover plate 43 via a second hinge axis extending in the second direction X, allowing the first top limiting member 111 to rotate between a third position and a fourth position. When the first top limiting member 111 is in the third position, the second hook portion 112 hooks onto the stop structure 10 from the side of the stop structure 10 away from the base 1. At this time, the cover plate 43 is locked and cannot move in the direction away from the second bracket 9. When in the fourth position, the second hook portion 112 disengages from the stop structure 10, and the cover plate 43 can move in the direction away from the second bracket 9. The rotation of the first top limit member 111 can be achieved by manual operation. Of course, the rotation of the first top limit member 111 can also be controlled by a drive device such as a motor.

[0112] Furthermore, such as Figure 8As shown, the first top limiting member 111 may include a third end and a fourth end distributed along the first direction Z. A second hook 112 is located at the third end, and a second hinge shaft is located between the third end and the fourth end of the first top limiting member 111. The first top limiting assembly 11 also includes a second elastic reset member 113, which can connect the cover plate 43 and the fourth end of the first top limiting member 111. The second elastic reset member 113 can apply a pushing force to the fourth end of the first top limiting member 111, that is, a force acting in a direction away from the cover plate 43, causing the second hook 112 located at the third end to tend to move towards the second bracket 9. Without applying an external force, the second elastic reset member 113 can keep the first top limiting member 111 always in the third position. It can only rotate to the fourth position under the action of an external force. The second elastic reset member 113 can be an elastic member made of elastic material such as a spring or rubber, which can be pressed between the cover plate 43 and the second end of the first top limiting member 111.

[0113] Furthermore, such as Figure 1 , Figure 2 and Figure 8 As shown, the outer peripheral surface of the cover plate 43 may be provided with a first receiving groove 431, and the receiving groove is open at one end facing the second bracket 9. The second hinge shaft may be disposed in the first receiving groove 431 along the second direction X. The fourth end of the first top limiting member 111 is at least partially accommodated in the first receiving groove 431. The surface of the second bracket 9 away from the supporting block 2 may be provided with a second receiving groove 92 recessed towards the supporting block 2, and the second receiving groove 92 is open at one end facing the cover plate 43 and opposite to the open end of the first receiving groove 431. The fourth end of the first top limiting member 111 may extend into the second receiving groove 92.

[0114] The stop structure 10 can be disposed on the inner wall of the second receiving groove 92. It can be a protruding ridge formed on the inner wall of the second receiving groove 92 and extending along the second direction X, and can hook with the second hook portion 112. The first top limiting member 111 can slide or clearance fit with the inner wall of the second receiving groove 92. When the cover plate 43 moves along the first direction Z, the first top limiting member 111 can slide along the second receiving groove 92. At the same time, the second receiving groove 92 can be a stepped groove, which can include a first section and a second section distributed along the first direction Z. The second section is located between the first section and the base 1, and the first section is wider than the second section. The first top limiting member 111 extends into the first section and is blocked by the bottom of the first section, so it cannot enter the second section.

[0115] In addition, in some embodiments, the second hook 112 may include a plurality of claws distributed at intervals along the second direction X, each claw being able to engage with the stop structure 10 simultaneously.

[0116] Through the first receiving groove 431 and the second receiving groove 92 described above, at least a portion of the first top limiting member 111 can be embedded into the cover plate 43 and the second bracket 9, which helps to save space.

[0117] The second bracket 9 and the first top limiting component 11 mentioned above can be a whole, and there can be two of them. They can be symmetrically distributed on both sides of the support block 2 along the third direction Y.

[0118] like Figure 2 As shown, in some embodiments of this disclosure, the pressing assembly 4 further includes a second pressing limit member 12 and a third elastic mechanism 13, wherein:

[0119] The second top limiting member 12 is located between the cover plate 43 and the first bracket 5. The third elastic mechanism 13 connects the cover plate 43 and the second top limiting member 12. The cover plate 43 can drive the second top limiting member 12 to reciprocate along the first direction Z through the third elastic mechanism 13, thereby moving closer to or further away from the first bracket 5. When in contact with the first bracket 5, it is blocked by the first bracket 5 and cannot continue to move towards the base 1, thus playing a limiting role. The third elastic mechanism 13 can also play a buffering role.

[0120] In some embodiments of this disclosure, the third elastic mechanism 13 may include a third guide rod 131 and a third elastic element 132. The third guide rod 131 may be arranged along a first direction Z and connected to the second top limiting member 12 and the cover plate 43. Relative to one of the second top limiting member 12 and the cover plate 43, the third guide rod 131 may slide along a third direction Y. For example, the third guide rod 131 may extend through the second top limiting member 12 and the cover plate 43, and the third guide rod 131 is threadedly connected to the top pressing block 41 and slidably engaged with the cover plate 43. A third limiting nut 133 may be provided at one end of the third guide rod 131 extending through the cover plate 43 to prevent the cover plate 43 from dislodging from the third guide rod 131. The third elastic element 132 is sleeved on the third guide rod 131 and clamped between the second top limiting member 12 and the cover plate 43. The third elastic element 132 may be a spring or a rubber sleeve or other elastic device.

[0121] Of course, in other embodiments of this disclosure, the third elastic mechanism 13 may not be provided with the third guide rod 131, and the third elastic element 132 may be used to directly connect the cover plate 43 and the second top limiting element 12, as long as the required force can be provided.

[0122] The pressure holding device may also include a top drive device, which can be connected to the cover plate 43 and drive the cover plate 43 to reciprocate along the first direction Z. The top drive device can be a cylinder or a hydraulic cylinder, or a linear motor, etc., as long as it can output linear motion.

[0123] To facilitate stress detection in workpiece 01, a stress detection element can be installed in at least one of the supporting pressure block 2, side pressure block 31, and top pressure block 41 to detect the stress in workpiece 01. The stress detection element can be located on the surface of at least one of the bottom cavity 21, side cavity 311, and top cavity 411; alternatively, it can be located inside the supporting pressure block 2, side pressure block 31, and top pressure block 41, as long as stress can be detected. The stress detection element can be a strain gauge, and the stress can be calculated from the strain detected by the strain gauge. To facilitate data processing, the pressure holding device can also include a processing circuit, which can be connected to the stress detection element to determine the stress based on the detected data.

[0124] This disclosure also provides a pressure-holding method, which can be used in any of the pressure-holding devices described above. The structure of the pressure-holding device can be referred to the embodiments above, and will not be repeated here. The pressure-holding method includes steps S10-S40, wherein:

[0125] Step S10: Place the workpiece on the support block and attach the accessories to the workpiece surface with adhesive.

[0126] When placing the workpiece, ensure that the area to be pressed is on the outside, meaning that this area is not in contact with the support block.

[0127] Step S20: Move the top pressure block toward the workpiece in the first direction to apply pressure to the attachment and the workpiece.

[0128] The area where the top pressure block is bonded to the accessories and workpiece is fitted together.

[0129] Step S30: Move the side pressure block toward the workpiece along the second direction to apply pressure to the attachment and the workpiece.

[0130] The side pressure block is bonded to the area where it is attached to the accessories and workpiece.

[0131] Step S40: After holding the attachments and workpiece under pressure for a specified time, remove the workpiece and the attachments bonded to it.

[0132] The specified duration can be determined based on the characteristics of the adhesive, as long as the bonding between the accessory and the workpiece can be achieved.

[0133] After the pressure holding time reaches the specified duration, the side pressure block and top pressure block can be pulled out, and the workpiece with the attached accessories can be removed, thus ending the pressure holding process.

[0134] In addition, between step S40 and after step S30, the pressure of the workpiece under pressure can be tested using the top pressure block and the side pressure block to ensure that the equipment is operating normally before executing step S40.

[0135] This disclosure also provides a design method for a pressure-holding device, which may include:

[0136] Step S110: Design the shape of the pressure-holding head in the preliminary stage. Determine the direction and angle of the workpiece placement based on the position where the workpiece needs to be pressure-held, and design multiple pressure heads.

[0137] Step S120: Simulate the preliminary design of the pressure head using simulation software to ensure that the stress of the pressure head on the attachment or workpiece is as uniform as possible, and adjust the shape of the pressure head.

[0138] The workpiece can be simulated first to confirm the stress distribution. The shape of the pressure head can be designed based on the stress distribution. During this process, the direction and angle of the workpiece can be adjusted multiple times to confirm the optimal position and stress distribution.

[0139] The simulation process includes: setting material parameters, importing or drawing 3D drawings, mesh generation, setting contact parameters, establishing a mechanical model, and setting results.

[0140] Step S130: Hold pressure to confirm the actual effect.

[0141] The simulation confirmed that the design pressure head had low risk and manufactured it. The actual dispensing and pressure holding effect was confirmed at the pressure holding station, and the adverse conditions on site were collected.

[0142] Step S140: Simulation optimization and design optimization.

[0143] Based on actual production defects, simulation optimization and design optimization are carried out on defective areas to form the optimal pressure holding design, that is, to determine the position of the swaying part, the angle of the swaying part and the pressure head, so that the movement direction of the pressure head is consistent with the stress direction of the workpiece.

[0144] Step S150: Manufacture the pressure holding device according to the design results.

[0145] The pressure-holding device designed based on the above design method ensures close contact between the pressure head and the corresponding workpiece attachment, with uniform force on the contact surface. This guarantees normal and effective pressure application during the adhesive curing process, avoiding problems such as poor adhesive curing and delamination caused by uneven force, thus ensuring a good bonding effect. After orthogonal pressure-holding process design, the attachment and workpiece are uniformly stressed, eliminating excessive local stress. When the amount of adhesive is fixed and controlled, it avoids adhesive overflow caused by uneven force, thereby reducing corresponding manpower and maintenance costs, and preventing problems such as poor appearance or insufficient adhesive. Simultaneously, after orthogonal pressure-holding process design, the pressure-holding device controls the application of uniform and appropriate force, causing the attachment and workpiece to be pressed together as a whole, achieving precise bonding without gaps or discontinuities, improving the overall consistency of the workpiece. Furthermore, the force direction of the cover plate and push plate is consistent with the force direction of the pressure head connected to them. Under long-term use, this reduces waste caused by wear of the pressure-holding device, improves overall process efficiency, and reduces costs and manufacturing difficulty.

[0146] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A pressure maintaining device, characterized by, The pressure maintaining device comprises: a base; supporting blocks stacked on the base along a first direction for supporting workpieces to be pressed; a side pressing assembly arranged on the same side of the base as the supporting blocks; the side pressing assembly comprises side pressing blocks distributed along a second direction, a first elastic mechanism and a push plate; the side pressing blocks are located between the supporting blocks and the push plate, and the side pressing blocks and the push plate are connected through the first elastic mechanism; the push plate can drive the side pressing blocks to reciprocate along the second direction through the first elastic mechanism to press the workpieces; a top pressing assembly arranged on the side of the supporting blocks away from the base; the top pressing assembly comprises top pressing blocks distributed along the first direction, a second elastic mechanism and a cover plate; the top pressing blocks are located between the supporting blocks and the cover plate, and the top pressing blocks and the cover plate are connected through the second elastic mechanism; the cover plate can drive the top pressing blocks to reciprocate along the first direction through the second elastic mechanism to press the workpieces; the first direction and the second direction are different.

2. The pressure maintaining device according to claim 1, characterized by The pressure maintaining device further comprises: a first support arranged on the same side of the base as the supporting blocks; the side pressing assembly further comprises a driving rod, the driving rod is rotationally connected with the first support, penetrates through the push plate along the second direction and is threadedly connected with the push plate.

3. The pressure maintenance device of claim 2, wherein The driving rod is provided with two stoppers distributed along an axial direction, and the push plate is located between the two stoppers.

4. The pressure maintaining device according to claim 2, characterized by The pressure maintaining device further comprises: a side limiting assembly, the side limiting assembly comprises a side limiting piece, the side limiting piece is arranged on the first support and can move at least between a first position and a second position; when the side limiting piece is located at the first position, the side limiting piece is at least partially blocked on the side of the push plate away from the side pressing blocks; when the side limiting piece is located at the second position, the side limiting piece is disengaged from the push plate.

5. The pressure maintenance device of claim 4, wherein The first support comprises a fixed part and two clamping parts connected with the fixed part, the fixed part is fixed on the base, and the two clamping parts are distributed along the first direction; the driving rod is rotationally connected with the fixed part; the side limiting piece has a first hooking part, the side limiting piece is clamped between the two clamping parts and is hinged with the clamping parts through a first hinge shaft extending along the first direction, so that the side limiting piece can rotate between the first position and the second position; when the side limiting piece is located at the first position, the first hooking part is hooked with the push plate from the side of the push plate away from the side pressing blocks; when the side limiting piece is located at the second position, the first hooking part is disengaged from the push plate.

6. The pressure maintaining device according to claim 5, characterized by The side limiting piece comprises a first end and a second end, the first hooking part is located at the first end, and the first hinge shaft is located between the first end and the second end of the side limiting piece; the side limiting assembly further comprises: a first elastic return piece arranged between the two clamping parts and connected with the fixed part and the second end of the limiting piece, the first elastic return piece applies a pushing force to the second end of the side limiting piece.

7. The pressure maintenance device of claim 1, wherein The pressure maintaining device further comprises: A second support is arranged on the same side of the base as the support pressing block; the cover plate is supported on the second support and is movable along the first direction.

8. The pressure maintaining device according to claim 7, characterized by The second support is provided with a stop structure; the pressure maintaining device further comprises: A first top limiting assembly, the first top limiting assembly comprises a first top limiting piece, the first top limiting piece is connected with the cover plate and extends towards the base; the first top limiting piece is movable between a third position and a fourth position; when the first top limiting piece is located at the third position, the first top limiting piece is at least partially blocked on a side of the stop structure close to the base; when the first top limiting piece is located at the fourth position, the first top limiting piece is disengaged from the stop structure.

9. The pressure maintaining device according to claim 8, characterized in that An end of the first top limiting piece close to the base is provided with a second hook portion; the first top limiting piece is hinged to the cover plate through a second hinge shaft extending along the second direction, so that the first top limiting piece is rotatable between the third position and the fourth position; when the first top limiting piece is located at the third position, the second hook portion is hooked with the stop structure from a side of the stop structure away from the base; when the first top limiting piece is located at the fourth position, the second hook portion is disengaged from the stop structure.

10. The pressure maintenance device of claim 9, wherein, The first top limiting piece comprises a third end and a fourth end distributed along a first direction; the second hook portion is located at the third end; the second hinge shaft is located between the third end and the fourth end of the first top limiting piece; the first top limiting assembly further comprises: A second elastic return piece connected between the cover plate and the fourth end of the first top limiting piece; the second elastic return piece applies a pushing force to the fourth end of the first top limiting piece.

11. The pressure maintaining device of claim 2, wherein The pressure maintaining device further comprises: A second top limiting piece arranged between the cover plate and the first support; A third elastic mechanism connected between the cover plate and the second top limiting piece; the cover plate can drive the second top limiting piece to reciprocate along the first direction through the third elastic mechanism.

12. The pressure maintenance device of claim 7, wherein, A surface of the second support close to the cover plate is provided with a plurality of limiting columns extending along the first direction; an outer circumferential surface of the cover plate is in sliding cooperation with the limiting columns.

13. The pressure maintenance device of any one of claims 1-12, wherein, The first elastic mechanism comprises a first guide rod and a first elastic piece; the first guide rod is arranged along the second direction and is connected with the side pressing block and the push plate and is slidable relative to one of the side pressing block and the push plate; the first elastic piece is sleeved outside the first guide rod and is clamped between the side pressing block and the push plate.

14. The pressure maintenance device of any one of claims 1-12, wherein, The second elastic mechanism comprises a second guide rod and a second elastic piece; the second guide rod is arranged along the first direction and is connected with the top pressing block and the cover plate and is slidable relative to one of the top pressing block and the cover plate; the second elastic piece is sleeved outside the second guide rod and is clamped between the top pressing block and the cover plate.

15. The pressure maintenance device of claim 11, wherein, The third elastic mechanism comprises a third guide rod and a third elastic piece. The third guide rod is arranged along the first direction and connected with the second top limiting piece and the cover plate and can slide relative to one of the second top limiting piece and the cover plate. The third elastic piece is sleeved outside the third guide rod and clamped between the second top limiting piece and the cover plate.

16. The pressure maintenance device of any one of claims 1-12, wherein, At least one of the support pressing block, the side pressing block and the top pressing block is provided with a stress detection element for detecting the stress of the workpiece.

17. The pressure maintenance device of any one of claims 1-12, wherein, The first direction and the second direction are perpendicular.

18. The pressure maintenance device of any one of claims 1-12, wherein, The pressure maintaining device further comprises: a side driving device for driving the push plate to reciprocate along the second direction; a top driving device for driving the cover plate to reciprocate along the first direction.

19. A method of pressure maintenance, characterized by The pressure maintaining method for the pressure maintaining device of any one of claims 1-18 comprises: placing the workpiece on the support pressing block and bonding the accessory to the surface of the workpiece by adhesive; moving the top pressing block along the first direction towards the workpiece to pressurize the accessory and the workpiece; moving the side pressing block along the second direction towards the workpiece to pressurize the accessory and the workpiece; after maintaining the pressure of the accessory and the workpiece for a specified time, taking out the workpiece and the accessory bonded to the workpiece.

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