Pressure maintaining clamp and pressure maintaining equipment

Abstract

The utility model provides a pressure maintaining clamp and pressure maintaining equipment. The pressure maintaining clamp and the pressure maintaining equipment are used for solving the problem that an existing pressure maintaining clamp is prone to causing damage to structural parts during pressure maintaining. The pressure maintaining clamp comprises a base and a sealing ring. The base is provided with a first surface, and an air exhaust channel is arranged in the base. The sealing ring is provided with a first end and a second end, the first end is connected with the first surface to form a sealing face, the sealing ring and the base define an adsorption space, and the adsorption space is communicated with the air exhaust channel. The base is further provided with a supporting part, the supporting part is located on the outer side of the sealing ring, and the supporting part protrudes out of the first surface in the axial direction of the sealing ring. The supporting part has a bearing surface which is located on the side, away from the first surface, of the supporting part. According to the pressure maintaining clamp, atmospheric pressure is used for maintaining pressure, the pressure maintaining pressure borne by all positions of the bonding face between the first structural part and the second structural part can be more uniform, and the risk that the second structural part is crushed and damaged by a pressing head of the oppositely-buckled pressure maintaining clamp can be avoided.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of tooling fixtures, and in particular, to a pressure-holding fixture and a pressure-holding device. Background Art

[0002] Two structural components in an electronic device are generally bonded and fixed together by glue (such as hot melt glue, structural glue, photosensitive glue, etc.). After dispensing glue, the two mutually bonded structural components usually require a long time of pressure holding to completely cure the glue.

[0003] In mass production, pressure holding is achieved through a pressure-holding fixture. The fixture is mainly used to generate relative pressure between two mutually bonded structural components to achieve pressure holding on the bonding surface. However, the existing pressure-holding fixtures are prone to damage the structural components during pressure holding. Utility Model Content

[0004] The embodiments of the present application provide a pressure-holding fixture and a pressure-holding device, which are used to solve the problem that the existing pressure-holding fixtures are prone to damage the structural components during pressure holding.

[0005] To achieve the above object, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a pressure-holding fixture, which includes a base and a sealing ring.

[0007] Wherein, the base has a first surface, and an air extraction channel is provided in the base. The air extraction channel is adapted to be connected to a vacuum pumping device. The sealing ring has a first end and a second end. The first end is connected to the first surface to form a sealing surface. The sealing ring and the base enclose an adsorption space, and the adsorption space is connected to the air extraction channel. A support portion is further provided on the base. The support portion is located outside the sealing ring, and along the axial direction of the sealing ring, the support portion protrudes from the first surface; the support portion has a bearing surface, and the bearing surface is located on the side of the support portion away from the first surface.

[0008] The pressure-holding fixture provided by the present application is used to perform pressure holding on two mutually bonded structural components. The two structural components can be respectively referred to as a first structural component and a second structural component. Among them, the first structural component and the second structural component are stacked, and the first structural component is provided with an opening penetrating through the first structural component. The second structural component can be completely located on one side of the first structural component, or a part of the second structural component can also extend into the opening on the first structural component. The part around the opening on the first structural component is adhesively bonded to the second structural component with glue to form an annular bonding surface. The combination of the first structural component and the second structural component after dispensing glue and assembling can be referred to as a first structural assembly.

[0009] The pressure-holding fixture provided in the first aspect of the present application is provided with a sealing ring on the first surface of the base (the sealing ring is generally made of a soft elastic material, such as rubber, silicone, etc.). An air extraction channel communicating with the adsorption space inside the sealing ring is also provided in the base, and a support portion protruding from the first surface is further provided outside the sealing ring. When the above pressure-holding fixture is in use, taking a part of the second structural member extending into the opening on the first structural member as an example, first place the first structural component on the bearing surface of the support portion (the first structural member abuts against the bearing surface). At this time, the second end of the sealing ring will fit with the part of the second structural member extending into the opening, and the adsorption space will be closed. The air extraction channel is connected to a vacuum extraction device (such as an air extraction pump, a vacuum generator, etc.) through a trachea, and then the vacuum extraction device is started. The air in the adsorption space is evacuated, and the air pressure will gradually decrease. At this time, the second structural member will be subjected to the pressure generated by the air pressure difference on both sides of it (the air pressure difference on both sides of the second structural member is the vacuum degree in the adsorption space). This pressure is the pressure-holding pressure. That is to say, the pressure-holding fixture provided in the present application uses atmospheric pressure for pressure holding, and can make the pressure-holding pressure received at each place on the bonding surface between the first structural member and the second structural member more uniform. And compared with the traditional opposed-clamping type pressure-holding fixture, when the pressure-holding fixture provided in the present application is in use, the second structural member will not be directly squeezed by the pressing head of the opposed-clamping type pressure-holding fixture, so the risk of the second structural member being damaged by the pressing head can be avoided.

[0010] Combined with the first aspect, in a possible implementation manner, along the axial direction of the sealing ring, the second end of the sealing ring protrudes from the bearing surface of the support portion.

[0011] In this way, the second end of the sealing ring protrudes from the bearing surface of the support portion. Since the sealing ring is generally made of a soft elastic material, its structural strength is not sufficient to completely support the first structural component. Therefore, when the first structural component is placed on the pressure-holding fixture, the first structural component still abuts against the bearing surface of the support portion, and the sealing ring will be compressed and deformed under the action of the gravity of the first structural component. The second end of the sealing ring will be in close fit with the second structural member under the action of its own elastic force, thereby reducing the risk of the pressure-holding pressure dropping due to air leakage between the sealing ring and the second structural member.

[0012] Combined with the first aspect, in another possible implementation manner, the sealing ring includes a first part and a second part. The first part and the second part are distributed along the axial direction of the sealing ring, and the second part is located on the side of the first part away from the first surface. Along the axial direction of the sealing ring, the end of the first part close to the second part is lower than the bearing surface of the support portion, and the elastic modulus of the second part is less than the elastic modulus of the first part.

[0013] In this way, the first part has a relatively large elastic modulus, enabling the first part to serve as the structural main body of the entire sealing ring and providing structural support for other parts of the sealing ring. The second part has a relatively small elastic modulus, making the second part prone to compressive deformation when subjected to the pressure of the first structural component and maintaining a tight fit with the second structural member. For example, the first part is made of a relatively hard rubber, and the second part is made of a softer silicone, hydrogel, etc. Moreover, one end of the first part close to the second part is lower than the bearing surface of the supporting part, that is to say, the first part with a larger elastic modulus is below the bearing surface. After the first structural component abuts against the bearing surface, the relatively soft second part of the sealing ring is mainly compressed and deformed, thus avoiding the first part exerting a large jacking force on the second structural member, which may cause deformation of the second structural member or cause the glue between the second structural member and the first structural member to come off.

[0014] Combined with the first aspect, in another possible implementation, the sealing ring further includes a third part, which is located at the first end of the sealing ring, and the third part is arranged on one side of the first part close to the axis of the sealing ring. The pressure-holding fixture further includes a fixing member, which is arranged inside the sealing ring and fixedly connected to the base. The fixing member is provided with a through hole that axially penetrates the fixing member, and one end of the through hole communicates with the air extraction channel. An annular flange is formed on one side of the fixing member facing the first part, and the third part is clamped between the annular flange and the base.

[0015] In this way, on the one hand, through the cooperation between the third part on the sealing ring and the annular flange on the fixing member, and by using the pressure generated by the fixing member on the sealing ring, the first end of the sealing ring can be tightly attached to the first surface of the base to achieve sealing.

[0016] On the other hand, the third part is located at the first end of the sealing ring and is also located on one side of the first part close to the axis of the sealing ring, that is to say, the third part can also increase the end face area of the first end of the sealing ring to a certain extent, which is also to increase the area of the sealing surface formed after the first end of the sealing ring is connected to the first surface of the base, thereby further reducing the risk of pressure drop in the pressure-holding caused by air leakage between the sealing ring and the base.

[0017] Combined with the first aspect, in another possible implementation, the pressure-holding fixture further includes a first fastener, and the fixing member is fixed to the base by the first fastener. Among them, the above-mentioned first fastener can be a bolt, a screw, a rivet, a buckle, etc. With this setting, the installation difficulty of the fixing member on the base can be reduced through the first fastener. After installation, the pressure generated by the first fastener on the fixing member will be transmitted to the third part of the sealing ring through the annular flange on the fixing member, so that the first end of the sealing ring is tightly attached to the first surface of the base to achieve sealing.

[0018] In combination with the first aspect, in another possible implementation, a limiting groove is provided on the first surface, and part of the sealing ring is located in the limiting groove. The first end of the sealing ring is connected to the bottom surface of the limiting groove to form a sealing surface. In this way, when the sealing ring is installed on the base, it is equivalent to embedding a part of the sealing ring into the limiting groove, thereby reducing the risk of the sealing ring shifting relative to the base.

[0019] In combination with the first aspect, in another possible implementation, the supporting portion is arranged around the sealing ring for one week. In this way, the supporting portion is also annular. The supporting portion can provide uniform and stable support for various positions of the first structural member. Thus, during the vacuum pressure maintaining process, the pressure maintaining pressure can be evenly dispersed on the bonding surface formed between the first structural member and the second structural member. That is to say, the above structural design can make the thickness of the adhesive layer between the first structural member and the second structural member as uniform as possible, and further achieve a better curing and bonding effect.

[0020] In combination with the first aspect, in another possible implementation, there are multiple supporting portions, and the multiple supporting portions are arranged at intervals along the circumferential direction of the sealing ring. For example, in actual application, the multiple supporting portions can be arranged at equal intervals around the sealing ring. In this way, the multiple supporting portions can provide more stable support for the first structural member. And during the vacuum pressure maintaining process, the pressure maintaining pressure can also be evenly dispersed on multiple points of the bonding surface formed between the first structural member and the second structural member, and further a better curing and bonding effect can be achieved. In addition, the multiple supporting portions arranged at intervals are also beneficial to the overall weight reduction of the pressure maintaining fixture.

[0021] In combination with the first aspect, in another possible implementation, a limiting portion is further provided on the base. The limiting portion is located on the side of the supporting portion away from the sealing ring, and along the axial direction of the sealing ring, the limiting portion protrudes from the bearing surface of the supporting portion. In this way, by providing the limiting portion on the side of the supporting portion away from the sealing ring, when the first structural component is placed on the supporting portion, the limiting portion can play a role in guiding and rough positioning. And after the structural member is placed on the supporting portion, the limiting portion can also reduce the risk of the first structural component sliding and shifting significantly relative to the base.

[0022] In combination with the first aspect, in another possible implementation, the limiting portion is arranged around the sealing ring for one week. In this way, the limiting portion is also annular, so as to limit the moving range of the first structural component relative to the base in any radial direction of the sealing ring and ensure the normal progress of the vacuum pressure maintaining process.

[0023] In combination with the first aspect, in another possible implementation, there are multiple limiting parts, and the multiple limiting parts are arranged at intervals along the circumferential direction of the sealing ring. For example, in actual application, the multiple limiting parts can be arranged at equal intervals around the sealing ring. In this way, the multiple limiting parts can respectively limit the movement range of the first structural component relative to the base in multiple directions, ensuring the normal progress of the vacuum pressure-holding process. In addition, the multiple spaced limiting parts are also beneficial to the overall weight reduction of the pressure-holding fixture.

[0024] In combination with the first aspect, in another possible implementation, the air extraction channel includes a first channel and a second channel. The first channel penetrates the base along the radial direction of the sealing ring. The second channel extends along the axial direction of the sealing ring, and one end of the second channel is communicated with the adsorption space, and the other end of the second channel is communicated with the first channel. The pressure-holding fixture further includes a plugging member, and the plugging member is arranged at one end of the first channel. In this way, when manufacturing the base, a drill rod can be used to directly drill through the base along the radial direction of the sealing ring to form the first channel, and then drill axially from the first surface along the sealing ring to communicate with the first channel to form the second channel. That is to say, when manufacturing the base, there is no need to calculate the depth of the first channel according to the position of the second channel, which is more convenient for processing.

[0025] In combination with the first aspect, in another possible implementation, the plugging member is detachably connected to the base. In this way, in large-scale production applications, the plugging members on the corresponding pressure-holding fixtures can be removed, and then multiple pressure-holding fixtures can be connected in series in sequence through air pipes. Furthermore, a single vacuum extraction device can be used to perform pressure-holding on multiple groups of first structural components in batches, which is beneficial to improving production efficiency.

[0026] In combination with the first aspect, in another possible implementation, the base includes a first base body and a second base body. The first base body and the second base body are distributed along the axial direction of the sealing ring, and the first base body and the second base body are assembled and fixed. The air extraction channel is arranged on the first base body. The first end of the sealing ring is fixedly connected to the surface of the first base body facing the second base body to form a sealing surface. The second base body is provided with a mounting hole, the mounting hole penetrates the second base body along the axial direction of the sealing ring, the sealing ring is located in the mounting hole, and the supporting part is located on the second base body.

[0027] In this way, since the first base body and the second base body are assembled and fixed, when facing first structural components of different shapes and sizes, only different second base bodies need to be replaced (the distribution positions of the supporting parts on each second base body correspond to the shapes and sizes of the first structural components), the first base body can be adapted and used in common with various second base bodies, and thus the versatility of the pressure-holding fixture can be improved and the cost can be reduced.

[0028] In combination with the first aspect, in another possible implementation, the pressure-holding fixture further includes a second fastener, and the first seat body and the second seat body are connected by the second fastener. Among them, the second fastener can be a bolt, a screw, a rivet, a buckle, etc. With this arrangement, the assembly difficulty between the first seat body and the second seat body can be reduced by the second fastener.

[0029] In combination with the first aspect, in another possible implementation, along the axial direction of the sealing ring, a positioning protrusion is provided on one side of the base away from the second end face, and a positioning groove cooperating with the positioning protrusion is provided on one side of the base close to the second end face.

[0030] Alternatively, a positioning groove is provided on one side of the base away from the second end face, and a positioning protrusion cooperating with the positioning groove is provided on one side of the base close to the second end face.

[0031] In this way, when stacking multiple pressure-holding fixtures together, the positioning protrusion on one pressure-holding fixture can be inserted into the positioning groove on an adjacent pressure-holding fixture, so that when multiple pressure-holding fixtures are stacked, they are more stable and not prone to tipping over, and can also reduce the stacking height of multiple pressure-holding fixtures to a certain extent and save space.

[0032] In combination with the first aspect, in another possible implementation, along the axial direction of the sealing ring, the height of the pressure-holding fixture is less than or equal to 30 mm. In this way, limiting the height of the pressure-holding fixture within 30 mm can reduce the total height when multiple pressure-holding fixtures are stacked, and reduce the occupation of storage space.

[0033] In a second aspect, an embodiment of the present application provides a pressure-holding fixture, which includes a base and a sealing ring.

[0034] Among them, the base has a first surface, and an air extraction channel is provided in the base. The air extraction channel is adapted to communicate with a vacuum extraction device. The sealing ring has a first end and a second end, and the first end is connected to the first surface to form a sealing surface. A support portion is further provided on the base. Along the axial direction of the sealing ring, the support portion protrudes from the first surface. The support portion has a bearing surface, and the bearing surface is located on the side of the support portion away from the first surface.

[0035] The support portion is located inside the sealing ring and is spaced from the sealing ring. The sealing ring, the support portion and the base jointly enclose an adsorption space, and the adsorption space communicates with the air extraction channel.

[0036] The pressure-holding fixture provided in the present application is used to hold pressure on two bonded structural members, which can be respectively referred to as a third structural member and a fourth structural member. Among them, the third structural member and the fourth structural member are stacked, and the third structural member is one circle larger than the fourth structural member. The combined body after the third structural member and the fourth structural member are assembled by dispensing can be referred to as a second structural assembly.

[0037] When the pressure-holding fixture provided in the second aspect of the present application is in use, first place the second structural component on the bearing surface of the supporting portion (the fourth structural member abuts against the bearing surface). At this time, the second end of the sealing ring will fit with the part of the third structural member protruding from the fourth structural member, and the adsorption space will be closed. The air extraction channel is connected to a vacuum extraction device (such as an air extraction pump, a vacuum generator, etc.) through a trachea, and then the vacuum extraction device is started. The air in the adsorption space is extracted, and the air pressure will gradually decrease. At this time, the third structural member will be subjected to the pressure generated by the air pressure difference on both sides of it (the air pressure difference on both sides of the third structural member is the vacuum degree in the adsorption space). This pressure is the pressure-holding pressure. That is to say, the pressure-holding fixture provided in the present application uses atmospheric pressure for pressure holding, and can make the pressure-holding pressure received at each place on the bonding surface between the third structural member and the fourth structural member more uniform. And compared with the traditional opposing snap-type pressure-holding fixture, when the pressure-holding fixture provided in the present application is in use, the third structural member will not be directly subjected to the pressure of the fixture, so the risk of the third structural member being damaged by the pressing head of the fixture can be avoided.

[0038] Combined with the second aspect, in a possible implementation manner, along the axial direction of the sealing ring, the second end of the sealing ring protrudes from the bearing surface of the supporting portion.

[0039] Combined with the second aspect, in another possible implementation manner, the sealing ring includes a first part and a second part. The first part and the second part are distributed along the axial direction of the sealing ring, and the second part is located on the side of the first part away from the first surface. Along the axial direction of the sealing ring, the end of the first part close to the second part is lower than the bearing surface of the supporting portion, and the elastic modulus of the second part is less than the elastic modulus of the first part.

[0040] Combined with the second aspect, in another possible implementation manner, the sealing ring further includes a third part. The third part is located at the first end of the sealing ring, and the third part is provided on the side of the first part close to the axis of the sealing ring. The pressure-holding fixture further includes a fixing member. The fixing member is provided inside the sealing ring and is fixedly connected to the base. A through hole penetrating the fixing member along the axial direction of the sealing ring is provided on the fixing member, and the through hole is communicated with one end of the air extraction channel. A ring-shaped flange is formed on the side of the fixing member facing the first part, and the third part is clamped between the ring-shaped flange and the base.

[0041] Combined with the second aspect, in another possible implementation manner, the pressure-holding fixture further includes a first fastener, and the fixing member is fixed on the base through the first fastener. Among them, the above-mentioned first fastener can be a bolt, a screw, a rivet, a buckle, etc.

[0042] Combined with the second aspect, in another possible implementation manner, a limiting groove is provided on the first surface. The sealing ring is partially located in the limiting groove, and the first end of the sealing ring is connected to the bottom surface of the limiting groove to form a sealing surface.

[0043] In combination with the second aspect, in another possible implementation, there are multiple supporting parts, and the multiple supporting parts are arranged at intervals along the circumferential direction of the sealing ring. For example, in actual application, the multiple supporting parts can be arranged at equal intervals along the circumferential direction of the sealing ring.

[0044] In combination with the second aspect, in another possible implementation, the air extraction channel includes a first channel and a second channel. The first channel penetrates the base along the radial direction of the sealing ring. The second channel extends along the axial direction of the sealing ring, and one end of the second channel is communicated with the adsorption space, and the other end of the second channel is communicated with the first channel.

[0045] In combination with the first aspect, in another possible implementation, along the axial direction of the sealing ring, the height of the pressure maintaining clamp is less than or equal to 30 mm.

[0046] In a third aspect, an embodiment of the present application provides a pressure maintaining device, which includes an air pipe, a vacuum pumping device, and the pressure maintaining clamp provided in the first aspect above. Among them, the air extraction channel of the pressure maintaining clamp is communicated with the vacuum pumping device through the air pipe.

[0047] It can be understood that for the beneficial effects that can be achieved by the pressure maintaining device provided in the third aspect and any of its possible implementation manners, reference can be made to the beneficial effects in the first aspect or the second aspect and any of their possible implementation manners, which will not be elaborated here. Description of the Drawings

[0048] Figure 1 It is a cross-sectional view of the first structural component formed by bonding the decorative ring and the display module provided in the embodiment of the present application;

[0049] Figure 2 It is a schematic structural diagram of an opposing snap-fit pressure maintaining clamp provided in the embodiment of the present application;

[0050] Figure 3 It is Figure 2 the schematic relative position diagram when the opposing snap-fit pressure maintaining clamp in Figure 1 performs pressure maintaining on the first structural component in

[0051] Figure 4 It is a schematic structural diagram of a pressure maintaining clamp provided in the embodiment of the present application;

[0052] Figure 5 It is Figure 4 the exploded view of the structure of the pressure maintaining clamp in

[0053] Figure 6 It is Figure 4 the internal structural cross-sectional view of the pressure maintaining clamp in

[0054] Figure 7 It is Figure 4The pressure-holding fixture in Figure 1 Schematic diagram of the relative positions when the first structural component in

[0055] Figure 8 Internal structure cross-sectional view of a pressure-holding fixture provided by an embodiment of the present application;

[0056] Figure 9 Internal structure cross-sectional view of another pressure-holding fixture provided by an embodiment of the present application;

[0057] Figure 10 For Figure 9 Partial enlarged view at position A in

[0058] Figure 11 Schematic diagram of the structure of a sealing ring provided by an embodiment of the present application;

[0059] Figure 12 Internal structure cross-sectional view of yet another pressure-holding fixture provided by an embodiment of the present application;

[0060] Figure 13 For Figure 12 Exploded view of the structure of the pressure-holding fixture in

[0061] Figure 14 Schematic diagram of another pressure-holding fixture provided by an embodiment of the present application;

[0062] Figure 15 Schematic diagram of yet another pressure-holding fixture provided by an embodiment of the present application;

[0063] Figure 16 Schematic diagram of yet another pressure-holding fixture provided by an embodiment of the present application;

[0064] Figure 17 Internal structure sectional view of a pressure-holding fixture provided by an embodiment of the present application;

[0065] Figure 18 For Figure 17 Exploded view of the structure of the pressure-holding fixture in

[0066] Figure 19 Schematic diagram of yet another pressure-holding fixture provided by an embodiment of the present application;

[0067] Figure 20 For Figure 19 Another perspective schematic diagram of the pressure-holding fixture in

[0068] Figure 21 Internal structure sectional view of another pressure-holding fixture provided by an embodiment of the present application;

[0069] Figure 22Schematic diagram of the placement of the second structural component on the opposing snap-fit pressure maintaining fixture;

[0070] Figure 23 Internal structural cross-sectional view of another pressure maintaining fixture provided by an embodiment of the present application;

[0071] Figure 24 For Figure 23 The pressure maintaining fixture in Figure 22 Schematic diagram of the relative positions when the second structural component in is pressure maintained.

[0072] Reference numerals:

[0073] 10. First structural component; 11. Display module; 11a. Display screen; 11b. Translucent cover plate; 110. Compressed part; 111. First plate body; 112. Second plate body; 12. Decorative ring;

[0074] 20. Opposing snap-fit pressure maintaining fixture; 21. Upper fixture body; 22. Lower fixture body; 23. Press head; 231. Mounting seat; 232. Press head body;

[0075] 30. Pressure maintaining fixture; 31. Base; 311. First seat body; 312. Second seat body; 32. Sealing ring; 321. First part; 322. Second part; 323. Third part; 33. Sealing member; 34. Fixing member; 341. Annular flange; 342. Through hole; 35. First fastener; 36. Second fastener;

[0076] 310. First surface; 320. Support part; 320a. Bearing surface; 330. Limiting part; 340. Positioning protrusion;

[0077] 40. Second structural component; 41. Third structural member; 42. Fourth structural member;

[0078] 100. Air extraction channel; 101. First channel; 102. Second channel; 200. Adsorption space; 300. Limiting groove; 400. Mounting hole; 500. Positioning groove. Detailed implementation manners

[0079] In order to make the purpose, technical solutions and advantages of the application clearer, the following further describes the present application in detail with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0080] In the description of the present application, it should be clear that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, rather than meaning that the indicated device or element must have a specific orientation or position. Therefore, it should not be construed as a limitation to the present application. The "quantity" should also not be construed as a limitation to the present application.

[0081] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0082] Two structural components in an electronic device are usually bonded and fixed together with glue (such as hot melt glue, structural glue, photosensitive glue, etc.). After dispensing glue, the two structural components bonded to each other usually need to apply pressure to the bonding surface for a long time to completely cure the glue.

[0083] In mass production, the pressure application is generally achieved through a fixture. The fixture is mainly used to generate a relative pressure between two bonded structural components to achieve pressure application to the bonding surface.

[0084] Among them, the two structural components can be respectively referred to as a first structural component and a second structural component. The first structural component and the second structural component are stacked, and the first structural component is provided with an opening penetrating the first structural component. The second structural component can be completely located on one side of the first structural component, or a part of the second structural component can also extend into the opening on the first structural component. The part around the opening on the first structural component is adhesively bonded to the second structural component to form an annular bonding surface. The combination of the first structural component and the second structural component after dispensing glue and assembly can be referred to as a first structural assembly.

[0085] For example, in the field of smart watches, please refer to Figure 1 as shown Figure 1 is a cross-sectional view of the first structural assembly 10 formed by bonding the decorative ring 12 and the display module 11 provided in the embodiment of the present application. Usually, a decorative ring 12 is provided on the outer periphery of the display module 11 of a smart watch for decoration, and the display module 11 and the decorative ring 12 are also often bonded and fixed by dispensing glue. Among them, the decorative ring 12 can be regarded as the above-mentioned first structural component, and the central hole of the decorative ring 12 is the opening on the first structural component. The display module 11 can be regarded as the above-mentioned second structural component.

[0086] Specifically, the above display module 11 may include a light-transmitting cover plate 11b and a display screen 11a (English name: panel, also known as a display panel), and the light-transmitting cover plate 11b and the display screen 11a are stacked.

[0087] Among them, the light-transmitting cover plate 11b may include a first plate body 111 and a second plate body 112. The second plate body 112 is located on the side of the first plate body 111 away from the display screen 11a, and the first plate body 111 is one circle larger than the display screen 11a and the second plate body 112. The part of the first plate body 111 protruding from the display screen 11a may be simply referred to as the pressed part 110. It can be understood that the pressed part 110 is also annular and extends around the display screen 11a for one week.

[0088] During specific assembly, the decorative ring 12 is bonded and attached to the side of the first plate body 111 of the light-transmitting cover plate 11b away from the display screen 11a. The second plate body 112 of the light-transmitting cover plate 11b will extend into the central hole of the decorative ring 12. The combined body after bonding the decorative ring 12 and the display module 11 can be regarded as the above-mentioned first structural component 10.

[0089] Currently, when pressing the first structural component 10 formed by bonding the decorative ring 12 and the display module 11, the commonly used fixture is an opposing clamping type pressing fixture 20. Please refer to Figure 2 as shown in Figure 2 which is a schematic structural diagram of an opposing clamping type pressing fixture 20 provided by an embodiment of the present application. The opposing clamping type pressing fixture 20 includes an upper clamping body 21, a lower clamping body 22, and a pressing head 23. The upper clamping body 21 and the lower clamping body 22 are arranged oppositely. The pressing head 23 includes a mounting seat 231 and a pressing head body 232. The mounting seat 231 is fixed on the upper clamping body 21. The pressing head body 232 is annular (corresponding to the shape of the pressed part 110) and is located on the side of the mounting seat 231 away from the upper clamping body 21.

[0090] Please refer to Figure 3 as shown in Figure 3 which is Figure 2 the opposing clamping type pressing fixture 20 in Figure 1Schematic diagram of the relative positions during the pressure holding of the first structural component 10 in []. During pressure holding, first place the first structural component 10 on the lower clamping body 22 (the decorative ring 12 abuts against the lower clamping body 22, and the display screen 11a is located on the side of the decorative ring 12 close to the upper clamping body 21), then move the upper clamping body 21 gradually downward along the dotted arrow until the pressing head body 232 of the pressing head 23 abuts against the pressed part 110 of the light-transmitting cover plate 11b, and then apply a certain pressure to the pressed part 110 of the light-transmitting cover plate 11b through the pressing head 23 (this pressure comes from the magnetic force acting on the upper clamping body 21 or the elastic force of the spring), and maintain it for a period of time, so as to complete the pressure holding of the bonding surface between the decorative ring 12 and the first plate body 111 of the light-transmitting cover plate 11b.

[0091] However, since the width of the pressed part 110 of the light-transmitting cover plate 11b is small, it is very difficult to ensure that the pressing head body 232 is aligned with the pressed part 110 every time it moves downward with the upper clamping body 21. Once the upper clamping body 21 or the pressing head 23 is offset, the pressing head body 232 may directly press on the display screen 11a, thereby causing damage to the display screen 11a, resulting in poor display or even black screen.

[0092] In addition, since the pressure holding pressure of the above-mentioned opposing snap-fit pressure holding fixture 20 comes from mechanisms such as magnets or springs, the pressure holding pressure is not easy to adjust, the fluctuation range is large, and the pressure holding consistency is poor.

[0093] To solve the above problems, an embodiment of the present application provides a pressure holding fixture 30. Please refer to Figure 4 、 Figure 5 and Figure 6 as shown. Figure 4 is a schematic structural diagram of a pressure holding fixture 30 provided by an embodiment of the present application. Figure 5 is Figure 4 the exploded view of the structure of the pressure holding fixture 30 in []. Figure 6 is Figure 4 the internal structural cross-sectional view of the pressure holding fixture 30 in [].

[0094] The pressure holding fixture 30 includes a base 31 and a sealing ring 32. Among them, the base 31 has a first surface 310, and an air extraction channel 100 is provided in the base 31. The sealing ring 32 has a first end and a second end distributed along its axial direction. The first end of the sealing ring 32 is connected to the first surface 310 to form a sealing surface. The sealing ring 32 and the base 31 enclose an adsorption space 200, and the adsorption space 200 is communicated with the air extraction channel 100. A support portion 320 is further provided on the base 31. The support portion 320 is located outside the sealing ring 32, and along the axial direction of the sealing ring 32, the support portion 320 protrudes from the first surface 310. The support portion 320 has a bearing surface 320a, and the bearing surface 320a is located on the side of the support portion 320 away from the first surface 310.

[0095] For the convenience of the following description, an XYZ coordinate system is established. One radial direction of the sealing ring 32 is defined as the X-axis direction, another radial direction of the sealing ring 32 is defined as the Y-axis direction, and the axial direction of the sealing ring 32 is defined as the Z-axis direction.

[0096] It can be understood that the above-mentioned sealing ring 32 is generally made of soft elastic materials, such as nitrile rubber, neoprene, silica gel, etc., and this application does not make special limitations on this.

[0097] The cross-sectional shape (parallel to the XY plane) of the sealing ring 32 can be regular or irregular shapes such as circular, elliptical, rectangular, etc., and this application does not make special limitations on this.

[0098] The sealing ring 32 can be fixed on the base 31 by means of bonding, clamping, screwing, etc., and it is only necessary to ensure that the first end of the sealing ring 32 is sealingly connected to the first surface 310 of the base 31. This application does not make special limitations on this.

[0099] In this way, please refer to Figure 7 as shown in Figure 7 For Figure 4 the relative position schematic diagram of the pressure maintaining fixture 30 in Figure 1 when maintaining pressure on the first structural component 10 in

[0100] Moreover, compared with the traditional opposing snap-together type pressure maintaining fixture 20, when the pressure maintaining fixture 30 provided in this application is in use, the second structural member is not directly extruded by the above-mentioned pressing head 23. Therefore, the risk of the display screen 11a of the display module 11 being damaged by the pressing head 23 can be avoided.

[0101] In addition, an adsorption space 200 is formed by the sealing ring 32 and the base 31 to perform adsorption and pressure holding. Compared with conventional suction cup adsorption, the axial dimension of the sealing ring 32 is smaller than that of the suction cup, so that the height of the pressure holding fixture 30 along the Z axis can be limited to a range less than or equal to 30 mm. Furthermore, the total height when multiple pressure holding fixtures 30 are stacked can be reduced, thereby reducing the occupation of storage space. Exemplarily, the height of the pressure holding fixture 30 can be 30 mm, 25 mm, 23 mm, 20 mm, 19 mm, 15 mm, etc.

[0102] For ease of understanding, the following examples are all based on the sealing ring 32 being circular.

[0103] Please refer to Figure 8 as shown in Figure 8 which is a cross-sectional view of the internal structure of a pressure holding fixture 30 provided by an embodiment of the present application (parallel to the XZ plane). To prevent relative sliding between the sealing ring 32 and the base 31, a limiting groove 300 is provided on the first surface 310. Part of the sealing ring 32 is located in the limiting groove 300, and the first end of the sealing ring 32 is connected to the bottom surface of the limiting groove 300 to form the above-mentioned sealing surface. In this way, when the sealing ring 32 is installed on the base 31, it is equivalent to embedding a part of the sealing ring 32 into the limiting groove 300, and the outer wall surface of the sealing ring 32 parallel to the Z axis abuts against the inner wall surface of the limiting groove 300 parallel to the Z axis, thereby reducing the risk of the sealing ring 32 shifting relative to the base 31 in the XY plane.

[0104] In some embodiments, for the convenience of opening and processing the air extraction channel 100 on the base 31, please refer to Figure 9 as shown in Figure 9 which is another cross-sectional view of the internal structure of a pressure holding fixture 30 provided by an embodiment of the present application (parallel to the XZ plane). The air extraction channel 100 may include a first channel 101 and a second channel 102. Among them, the first channel 101 penetrates the base 31 along the radial direction of the sealing ring 32. The second channel 102 extends along the axial direction of the sealing ring 32, and one end of the second channel 102 communicates with the adsorption space 200, and the other end of the second channel 102 communicates with the first channel 101. At the same time, the pressure holding fixture 30 further includes a plugging member 33, and the plugging member 33 is provided at one end of the first channel 101. During use, the other end of the first channel 101 can be connected to a vacuum pumping device through an air pipe.

[0105] For example, please continue to refer to Figure 9 as shown in Figure 9In the shown orientation, the plugging member 33 is provided at the left end of the first channel 101. In this way, when manufacturing the base 31, a drill rod can be used to directly drill through the base 31 along the X-axis direction to form the first channel 101, and then a hole can be drilled from the bottom surface of the limiting groove 300 along the Z-axis direction until it communicates with the first channel 101 to form the second channel 102. That is to say, when manufacturing the base 31, there is no need to calculate the depth of the first channel 101 according to the position of the second channel 102, which is more convenient for processing.

[0106] Furthermore, the plugging member 33 and the base 31 can be designed to be detachably connected. In this way, during large-scale production applications, the plugging member 33 on the corresponding pressure-holding fixture 30 can be removed, and then multiple pressure-holding fixtures 30 can be connected in series through an air pipe. Furthermore, one vacuum pumping device can be used to simultaneously perform pressure holding on multiple groups of the first structural components 10 in batches, which is beneficial to improving production efficiency.

[0107] In some embodiments, please refer to Figure 10 as shown Figure 10 is Figure 9 a partial enlarged view of the position A in. Along the axial direction of the sealing ring 32 (parallel to the Z-axis), the second end of the sealing ring 32 protrudes from the bearing surface 320a of the supporting portion 320.

[0108] In this way, the second end of the sealing ring 32 protrudes from the bearing surface 320a of the supporting portion 320. Since the sealing ring 32 is generally made of a soft elastic material and its structural strength is not sufficient to completely support the first structural component 10, when the first structural component 10 is placed on the pressure-holding fixture 30, the first structural component 10 still abuts against the bearing surface 320a of the supporting portion 320, and the sealing ring 32 will undergo compressive deformation under the action of the gravity of the first structural component 10. The second end of the sealing ring 32 will keep the light-transmitting cover plate 11b of the display module 11 in close fit under the action of its own elastic force, thereby reducing the risk of pressure loss due to air leakage between the sealing ring 32 and the light-transmitting cover plate 11b.

[0109] Specifically, please continue to refer to Figure 10 as shown. The sealing ring 32 can include a first part 321 and a second part 322. The first part 321 and the second part 322 are distributed along the axial direction of the sealing ring 32, and the second part 322 is located on the side of the first part 321 away from the first surface 310. Along the axial direction of the sealing ring 32 (parallel to the Z-axis), the end of the first part 321 close to the second part 322 is lower than the bearing surface 320a, and the elastic modulus of the second part 322 is less than the elastic modulus of the first part 321.

[0110] In this way, the first part 321 has a relatively large elastic modulus, enabling the first part 321 to serve as the main structural body of the entire sealing ring 32 and providing structural support for other parts of the sealing ring 32. The second part 322 has a relatively small elastic modulus, making the second part 322 prone to compressive deformation when subjected to the pressure of the first structural component 10 and maintaining a tight fit with the light-transmitting cover plate 11b. For example, the first part 321 is made of a relatively hard rubber, and the second part 322 is made of a softer silicone gel, hydrogel, etc.

[0111] Moreover, one end of the first part 321 close to the second part 322 is lower than the bearing surface 320a. That is to say, the first part 321 with a larger elastic modulus is below the bearing surface 320a. After the first structural component 10 abuts against the bearing surface 320a, the relatively soft second part 322 of the sealing ring 32 is mainly compressed and deformed, thereby avoiding the first part 321 exerting a large top force on the display module 11, which may cause deformation of the display module 11 or cause the display module 11 to come off the decorative ring 12. Among them, the top force is the elastic force generated by the self-compression deformation of the sealing ring 32, and the direction is along the positive Z-axis.

[0112] Furthermore, please refer to Figure 11 、 Figure 12 and Figure 13 as shown in Figure 11 which is a schematic structural diagram of a sealing ring 32 provided by an embodiment of the present application, Figure 12 which is a cross-sectional view of the internal structure of another pressure-holding fixture 30 provided by an embodiment of the present application (parallel to the XZ plane), Figure 13 and Figure 12 is an exploded view of the structure of the pressure-holding fixture 30 in

[0113] Among them, the sealing ring 32 may further include a third part 323. The third part 323 is located at the first end of the sealing ring 32, and the third part 323 is provided on the side of the first part 321 close to the axis of the sealing ring 32.

[0114] At the same time, the pressure-holding fixture 30 further includes a fixing member 34. The fixing member 34 is provided inside the sealing ring 32, and the fixing member 34 is fixedly connected to the base 31. A through hole 342 penetrating the fixing member 34 along the axial direction of the sealing ring 32 is provided on the fixing member 34, and the through hole 342 is communicated with the air extraction channel 100. An annular flange 341 is formed on the side of the fixing member 34 facing the first part 321, and the third part 323 is clamped between the annular flange 341 and the base 31.

[0115] In this way, on the one hand, through the cooperation between the third part 323 on the sealing ring 32 and the annular flange 341 on the fixing member 34, and by using the pressure generated by the fixing member 34 on the sealing ring 32, the first end of the sealing ring 32 can be closely attached to the first surface 310 of the base 31 to achieve sealing.

[0116] On the other hand, the third part 323 is located at the first end of the sealing ring 32 and is also located on the side of the first part 321 close to the axis of the sealing ring 32. That is to say, the third part 323 can also increase the end face area of the first end of the sealing ring 32 to a certain extent, which means increasing the area of the sealing surface formed after the connection between the first end of the sealing ring 32 and the first surface 310 of the base 31, thereby further reducing the risk of pressure loss due to air leakage between the sealing ring 32 and the base 31.

[0117] Please continue to refer to Figure 13 As shown, in order to reduce the installation difficulty of the fixing member 34 on the base 31, the pressure maintaining fixture 30 may further include a first fastening member 35, and the fixing member 34 is fixed on the base 31 through the first fastening member 35. After installation, the pressure generated by the first fastening member 35 on the fixing member 34 will be conducted to the third part 323 of the sealing ring 32 through the annular flange 341 on the fixing member 34, so that the first end of the sealing ring 32 is closely attached to the base 31 to achieve sealing.

[0118] It can be understood that the above first fastening member 35 can be a bolt, a screw, a rivet, a buckle, etc., and the present application does not make special limitations on this.

[0119] In some embodiments, in order to enable the support portion 320 to provide uniform and stable support for various positions of the decorative ring 12, please refer back to Figure 4 As shown, the support portion 320 can be arranged around the sealing ring 32 for one week. In this way, the support portion 320 is also annular, so that during the vacuum pressure maintaining process, the pressure maintaining pressure can be evenly dispersed on the bonding surface formed between the decorative ring 12 and the display module 11. That is to say, the above structural design can make the thickness of the adhesive layer between the decorative ring 12 and the display module 11 as uniform as possible, thereby achieving a better curing and bonding effect.

[0120] In some other embodiments, please refer to Figure 14 As shown, Figure 14 This is a schematic structural diagram of another pressure maintaining fixture 30 provided by an embodiment of the present application. The support portion 320 can also be provided with a plurality of them, and the plurality of support portions 320 are arranged at intervals along the circumferential direction of the sealing ring 32. For example, Figure 14 in which the support portion 320 is provided with four, and the four support portions 320 are arranged at equal intervals along the circumferential direction of the sealing ring 32.

[0121] In this way, multiple supporting parts 320 can provide more stable support for the decorative ring 12. During the vacuum pressure holding process, the pressure holding pressure can also be evenly dispersed at multiple points on the bonding surface formed between the decorative ring 12 and the display module 11, thereby achieving a better curing and bonding effect. In addition, multiple spaced-apart supporting parts 320 are also beneficial to the overall weight reduction of the pressure holding fixture 30 compared to the annular supporting part 320.

[0122] Based on the above, please refer to Figure 15 as shown in Figure 15 which is a schematic structural diagram of another pressure holding fixture 30 provided by an embodiment of the present application. A limiting part 330 can also be provided on the base 31. Among them, the limiting part 330 is located on the side of the supporting part 320 away from the sealing ring 32, and along the axial direction of the sealing ring 32, the limiting part 330 protrudes from the bearing surface 320a of the supporting part 320. In this way, by providing the limiting part 330 on the side of the supporting part 320 away from the sealing ring 32, when the first structural component 10 is placed on the supporting part 320, the limiting part 330 can play a certain guiding and rough positioning role. After the structural component is placed on the supporting part 320, the limiting part 330 can also reduce the risk of large-scale sliding and displacement of the first structural component 10 relative to the base 31.

[0123] For example, please continue to refer to Figure 15 as shown in Figure 15 the pressure holding fixture 30 in Figure 4 is equivalent to adding a ring of limiting parts 330 on the side of the annular supporting part 320 away from the sealing ring on the basis of the pressure holding fixture 30 in

[0124] For another example, please refer to Figure 16 as shown in Figure 16 which is a schematic structural diagram of another pressure holding fixture 30 provided by an embodiment of the present application. Multiple limiting parts 330 can be provided, and the multiple limiting parts 330 are spaced apart along the circumferential direction of the sealing ring 32. In this way, the multiple limiting parts 330 can respectively limit the movement range of the first structural component 10 relative to the base 31 in multiple directions, ensuring the normal progress of the vacuum pressure holding process. In addition, the multiple spaced-apart limiting parts 330 are also beneficial to the overall weight reduction of the pressure holding fixture 30.

[0125] Exemplarily, Figure 16 the pressure holding fixture 30 in Figure 4On the basis of the medium pressure holding fixture 30, four limiting parts 330 are added on the side of the annular supporting part 320 away from the sealing ring. The four supporting parts 320 are arranged at equal intervals along the circumferential direction of the sealing ring 32. Through the cooperation of the four limiting parts 330, the moving range of the first structural component 10 relative to the base 31 can also be limited in any direction parallel to the XY plane.

[0126] On this basis, please refer to Figure 17 and Figure 18 as shown in Figure 17 which is an internal structure sectional view of a pressure holding fixture 30 provided by an embodiment of the present application, Figure 18 and Figure 17 is an exploded view of the structure of the pressure holding fixture 30 in

[0127] The base 31 may include a first seat body 311 and a second seat body 312. Among them, the first seat body 311 and the second seat body 312 are distributed along the axial direction of the sealing ring 32, and the first seat body 311 and the second seat body 312 are assembled and fixed. The air extraction channel 100 is arranged on the first seat body 311, and the surface of the first seat body 311 facing the second seat body 312 is the aforementioned first surface 310. An installation hole 400 is provided on the second seat body 312. The installation hole 400 penetrates through the second seat body 312 along the axial direction of the sealing ring 32. The sealing ring 32 is located in the installation hole 400, and the supporting part 320 is located on the second seat body 312.

[0128] In this way, since the first seat body 311 and the second seat body 312 are assembled and fixed, when facing the first structural components 10 of different shapes and sizes, only the different second seat bodies 312 need to be replaced (the distribution positions of the supporting parts 320 on each second seat body 312 correspond to the shapes and sizes of the first structural components 10), and the first seat body 311 can still be adapted and used in common with various second seat bodies 312, thereby improving the versatility of the pressure holding fixture 30 and reducing costs.

[0129] For example, Figure 17 in

[0130] the radius of the installation hole 400 is only slightly larger than the radius of the sealing ring. At this time, a part of the periphery of the installation hole 400 on the second seat body 312 can be used as the supporting part 320 of the pressure holding fixture 30, and a part of the second seat body 312 also protrudes toward the side away from the first seat body 311 to form the limiting part 330 of the pressure holding fixture 30. Specifically, there are two limiting parts 330, and the two limiting parts 330 are symmetrically arranged about the axis of the sealing ring 32. Figure 18 Please continue to refer to

[0131] It can be understood that the second fastener 36 described above can be a bolt, a screw, a rivet, a buckle, etc., and the present application does not make any special limitations in this regard.

[0132] In some embodiments, please refer to Figure 19 and Figure 20 as shown in Figure 19 FIG. 36 is a schematic structural view of another pressure-holding fixture 30 provided by an embodiment of the present application. Figure 20 FIG. Figure 19 FIG. 37 is another perspective view of the pressure-holding fixture 30 in FIG. Along the Z-axis direction, a positioning groove 500 is provided on the side of the second seat body 312 away from the first seat body 311, and a positioning protrusion 340 matching the positioning groove 500 is provided on the side of the first seat body 311 away from the second seat body 312.

[0133] In this way, when a plurality of pressure-holding fixtures 30 are stacked together in sequence, the positioning protrusion 340 on one pressure-holding fixture 30 can be inserted into the positioning groove 500 on an adjacent pressure-holding fixture 30, so that when the plurality of pressure-holding fixtures 30 are stacked, they are more stable, not prone to tipping, and can also reduce the stacking height of the plurality of pressure-holding fixtures 30 to a certain extent and save space.

[0134] Similarly, a positioning groove 500 can also be provided on the side of the first seat body 311 away from the second seat body 312, and a positioning protrusion 340 matching the positioning groove 500 is provided on the side of the second seat body 312 away from the first seat body 311 (this schematic view is omitted), and the plurality of pressure-holding fixtures 30 can also be made more stable when stacked, which will not be elaborated here.

[0135] In addition, please refer to Figure 21 as shown in Figure 21 FIG. 38 is a cross-sectional view of the internal structure of another pressure-holding fixture 30 provided by an embodiment of the present application. A plurality of sealing rings 32 can also be provided on the first seat body 311, and a plurality of mounting holes 400 can be provided on the second seat body 312. The plurality of mounting holes 400 correspond to the plurality of sealing rings one by one, and each adsorption space 200 surrounded by the sealing ring and the first seat body 311 is communicated with the air extraction channel 100. In this way, a plurality of groups of first structural components 10 can be batch pressure-held on one pressure-holding fixture 30 at the same time, which is beneficial to improving production efficiency.

[0136] In actual production, there is another situation where the two structural members are damaged by being pressed by the opposing snap-on pressure-holding fixture 20 after being bonded.

[0137] Please refer to Figure 22 as shown in Figure 22Schematic diagram of the second structural component 40 placed on the opposing snap - on pressure - maintaining fixture 20. The two structural components can be respectively called the third structural component 41 and the fourth structural component 42. Among them, the third structural component 41 and the fourth structural component 42 are stacked, and the third structural component 41 is one circle larger than the fourth structural component 42. The combination after dispensing and assembling of the third structural component 41 and the fourth structural component 42 can be called the second structural component 40.

[0138] Due to the structural characteristics of the third structural component 41 itself, the third structural component 41 cannot directly receive the pressure of the press head 23, nor can it directly receive the pressure of the lower fixture body 22. That is to say, whether the second structural component 40 is placed upright on the opposing snap - on pressure - maintaining fixture 20 (as Figure 22 shown, the fourth structural component 42 abuts against the lower fixture body 22, and the third structural component 41 is located on the side of the fourth structural component 42 close to the press head 23), or placed upside - down on the opposing snap - on pressure - maintaining fixture 20 (the third structural component 41 abuts against the lower fixture body 22, and the fourth structural component 42 is located on the side of the third structural component 41 close to the press head 23, and this schematic diagram is omitted), normal pressure - maintaining cannot be carried out. As long as the fixture is snapped together, the third structural component 41 will be damaged.

[0139] In response to this, the embodiment of the present application also provides another pressure - maintaining fixture 30. Please refer to Figure 23 shown, Figure 23 Internal structural cross - sectional view of another pressure - maintaining fixture 30 provided by the embodiment of the present application.

[0140] Among them, the base 31 has a first surface 310. An air extraction channel 100 is provided in the base 31, and the air extraction channel 100 is adapted to be connected to a vacuum pumping device. The sealing ring 32 has a first end and a second end. The first end is connected to the first surface 310 to form a sealing surface. A support portion 320 is also provided on the base 31. Along the axial direction of the sealing ring 32, the support portion 320 protrudes from the first surface 310. The support portion 320 has a bearing surface 320a, and the bearing surface 320a is located on the side of the support portion 320 away from the first surface 310.

[0141] The support portion 320 is arranged inside the sealing ring 32 and is spaced from the sealing ring 32. At this time, the sealing ring 32, the support portion 320 and the base 31 jointly enclose an adsorption space 200, and the adsorption space 200 is communicated with the air extraction channel 100.

[0142] In this way, when the above - mentioned pressure - maintaining fixture 30 is in use, please refer to Figure 24 shown, Figure 24 For Figure 23 the pressure - maintaining fixture 30 in Figure 22Schematic diagram of the relative positions of the second structural component 40 during pressure holding. First, place the second structural component 40 on the bearing surface 320a of the support portion 320 (the fourth structural member 42 abuts against the bearing surface 320a). At this time, the second end of the sealing ring 32 will fit with the part of the third structural member 41 protruding from the fourth structural member 42, and the adsorption space 200 will be closed. The air extraction channel 100 is connected to a vacuum extraction device (such as an air extraction pump, a vacuum generator, etc.) through a trachea, and then the vacuum extraction device is started. The air in the adsorption space 200 is evacuated, and the air pressure will gradually decrease. At this time, the third structural member 41 will be subjected to the pressure generated by the air pressure difference on both sides of it (the air pressure difference on both sides of the third structural member 41 is the vacuum degree in the adsorption space). This pressure is the pressure holding pressure F. That is to say, the above-mentioned pressure holding fixture 30 uses atmospheric pressure for pressure holding, and can make the pressure holding pressure received at each place on the bonding surface between the third structural member 41 and the fourth structural member 42 more uniform.

[0143] Moreover, compared with the traditional opposed snap-fit pressure holding fixture 20, when the pressure holding fixture 30 provided in the present application is in use, the third structural member 41 will not be directly extruded by the above-mentioned pressure head 23 or the lower fixture body 22. Therefore, the risk that the third structural member 41 is damaged by being pressed by the pressure head 23 or the lower fixture body 22 can be avoided.

[0144] In the description of this specification, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0145] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A pressure-holding fixture, characterized in that, Comprising: A base having a first surface, wherein an air extraction channel is provided in the base, and the air extraction channel is adapted to communicate with a vacuum device; A sealing ring having a first end and a second end, the first end being connected to the first surface to form a sealing surface, the sealing ring and the base enclosing an adsorption space, and the adsorption space communicating with the air extraction channel; A support portion is further provided on the base, the support portion is located outside the sealing ring, and along the axial direction of the sealing ring, the support portion protrudes from the first surface; the support portion has a bearing surface, and the bearing surface is located on a side of the support portion away from the first surface.

2. The pressure-holding fixture according to claim 1, wherein Along the axial direction of the sealing ring, the second end of the sealing ring protrudes from the bearing surface of the support portion.

3. The pressure-holding fixture according to claim 2, wherein The sealing ring includes a first portion and a second portion, the first portion and the second portion are distributed along the axial direction of the sealing ring, and the second portion is located on a side of the first portion away from the first surface; Along the axial direction of the sealing ring, one end of the first portion close to the second portion is lower than the bearing surface, and the elastic modulus of the second portion is less than that of the first portion.

4. The pressure-holding fixture according to claim 3, wherein The sealing ring further includes a third portion, the third portion is located at the first end of the sealing ring, and the third portion is provided on a side of the first portion close to the axis of the sealing ring; The pressure maintaining fixture further includes a fixing member, the fixing member is provided inside the sealing ring, and the fixing member is fixedly connected to the base; A through hole penetrating the fixing member along the axial direction of the sealing ring is provided on the fixing member, and the through hole communicates with the air extraction channel; A circular flange is formed on a side of the fixing member facing the first portion, and the third portion is clamped between the circular flange and the base.

5. The pressure-holding fixture according to claim 4, characterized in that, The pressure maintaining fixture further includes a first fastener, and the fixing member is fixed to the base by the first fastener.

6. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, A limiting groove is provided on the first surface, a part of the sealing ring is located in the limiting groove, and the first end is connected to the bottom surface of the limiting groove to form the sealing surface.

7. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, The support portion is arranged around the sealing ring for one week.

8. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, A plurality of the support portions are provided, and the plurality of support portions are arranged at intervals along the circumferential direction of the sealing ring.

9. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that A limiting portion is further provided on the base, the limiting portion is located on a side of the support portion away from the sealing ring, and along the axial direction of the sealing ring, the limiting portion protrudes from the bearing surface.

10. The pressure-holding fixture according to claim 9, wherein The limiting portion is arranged around the sealing ring for one week.

11. The pressure-holding fixture according to claim 9, wherein, A plurality of the limiting portions are provided, and the plurality of limiting portions are arranged at intervals along the circumferential direction of the sealing ring.

12. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, The air extraction channel includes a first channel and a second channel, the first channel penetrates the base along the radial direction of the sealing ring; The second channel extends along the axial direction of the sealing ring, one end of the second channel communicates with the adsorption space, and the other end of the second channel communicates with the first channel; The pressure maintaining fixture further includes a blocking member, and the blocking member is provided at one end of the first channel.

13. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, The base includes a first body and a second body. The first body and the second body are distributed along the axial direction of the sealing ring, and the first body and the second body are fixedly assembled with each other. The air extraction channel is provided on the first body. The first end of the sealing ring is connected to the surface of the first body facing the second body to form the sealing surface, and the sealing ring and the first body enclose the adsorption space. The second body is provided with a mounting hole. The mounting hole axially penetrates the second body along the axial direction of the sealing ring. The sealing ring is located in the mounting hole, and the supporting portion is located on the second body.

14. The pressure-holding fixture according to claim 13, characterized in that, The pressure maintaining fixture further includes a second fastener. The second body is fixed to the first body through the second fastener.

15. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that Along the axial direction of the sealing ring, on one side of the base far from the second end of the sealing ring, a positioning protrusion is provided, and on one side of the base close to the second end, a positioning groove matching with the positioning protrusion is provided. Alternatively, on one side of the base far from the second end, a positioning groove is provided, and on one side of the base close to the second end, a positioning protrusion matching with the positioning groove is provided.

16. The pressure-holding fixture according to any one of claims 1 to 5, characterized in that, Along the axial direction of the sealing ring, the height of the pressure maintaining fixture is less than or equal to 30 mm.

17. A pressure-holding fixture, characterized in that, Comprising: A base having a first surface. An air extraction channel is provided in the base, and the air extraction channel is adapted to communicate with a vacuum pumping device. A sealing ring having a first end and a second end. The first end is connected to the first surface to form a sealing surface. The base is further provided with a supporting portion. Along the axial direction of the sealing ring, the supporting portion protrudes from the first surface. The supporting portion has a bearing surface, and the bearing surface is located on the side of the supporting portion far from the first surface. The supporting portion is located inside the sealing ring and is spaced apart from the sealing ring. The sealing ring, the supporting portion and the base jointly enclose an adsorption space, and the adsorption space communicates with the air extraction channel.

18. The pressure-holding fixture according to claim 17, wherein, Along the axial direction of the sealing ring, the second end of the sealing ring protrudes from the bearing surface of the supporting portion.

19. The pressure-holding fixture according to claim 18, wherein The sealing ring includes a first part and a second part. The first part and the second part are distributed along the axial direction of the sealing ring, and the second part is located on the side of the first part far from the first surface. Along the axial direction of the sealing ring, one end of the first part close to the second part is lower than the bearing surface, and the elastic modulus of the second part is less than that of the first part.

20. A pressure-holding device, characterized in that, Comprising: An air pipe; A vacuum pumping device; A pressure maintaining fixture as described in any one of claims 1 to 19. The air extraction channel of the pressure maintaining fixture is communicated with the vacuum pumping device through the air pipe.

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