Sealant injection tool

Abstract

The utility model relates to a sealant injection tool. The tool comprises a flexible piece and an interference amount adjusting part. The flexible part is made of a flexible deformable material, the flexible part comprises a containing cavity, a first sealing part and a second sealing part, the containing cavity is divided by the first sealing part and the second sealing part to form a sealant injection cavity used for injecting sealant, and the display screen and the protective cover plate can be contained and positioned in the containing cavity; the first sealing part is used for being in sealing contact with a display screen in the accommodating cavity, and the second sealing part is used for being in the accommodating cavity. The interference amount adjusting part comprises a viscous material with flowability and / or a hole structure, the viscous material is used for being arranged between the first sealing part and the display screen, and the hole structure is arranged to be capable of increasing the deformation amount of the first sealing part. According to the scheme, the indentation probability of the display screen can be reduced, and the yield is improved.

Description

Technical Field

[0001] The present application relates to the field of sealing technology, and in particular to a sealant injection tool. Background Art

[0002] Taking mobile phones as an example, the display screen and the protective cover above it are sealed with sealant injected by tooling. Due to the display screen's inherently poor compressive strength, the sealant injection process leaves indentations where the display screen and tooling come into contact, increasing the defect rate. To address this issue, strict control of the display screen's thickness tolerance could be used to improve manufacturing precision, but this is currently not feasible due to technological limitations. Summary of the Invention

[0003] The present application provides a sealant injection tool that can reduce the probability of indentations on display screens and improve yield.

[0004] A sealant injection tool, comprising:

[0005] a flexible member made of a flexible and deformable material, the flexible member comprising a receiving cavity, a first sealing portion, and a second sealing portion; the receiving cavity being separated by the first and second sealing portions to form a glue injection cavity for injecting sealant; the display screen and the protective cover plate being capable of being received and positioned within the receiving cavity; the first sealing portion being configured to be in sealing contact with the display screen within the receiving cavity; the second sealing portion being configured to be in sealing contact with the protective cover plate within the receiving cavity; and the sealing portion between the display screen and the protective cover plate being configured to face the glue injection cavity;

[0006] The interference adjustment portion includes a fluid viscous material and / or a hole structure. The viscous material is used to be arranged between the first sealing part and the display screen. The hole structure is configured to increase the deformation of the first sealing part.

[0007] Optionally, the interference adjustment portion includes the viscous material, and the viscous material is configured as liquid glue, and the liquid glue is used to be applied on the display screen at a position in sealing contact with the first sealing portion.

[0008] Optionally, the thickness of the liquid glue coated on the display screen is 0.3 mm to 0.5 mm, and the viscosity of the liquid glue is 40,000 cps to 60,000 cps.

[0009] Optionally, the interference adjustment portion includes the hole structure, and the hole structure is provided on a side of the flexible member facing away from the first sealing portion and opposite to the first sealing portion.

[0010] Optionally, the hole structure passes through to the lower surface of the flexible member along a direction opposite to the first sealing portion.

[0011] Optionally, the sealant injection tool further includes a support base, the flexible member is fixedly connected to the upper surface of the support base, the support base is provided with a through hole passing through along the thickness direction thereof, and the through hole is opposite to the hole structure.

[0012] Optionally, the flexible member further includes an inner portion extending into the through hole, and the hole structure passes through the inner portion to the lower surface of the flexible member.

[0013] Optionally, the flexible member includes a bottom wall and surrounding walls extending upward from four edges of the bottom wall, the bottom wall and the surrounding walls together form the accommodating cavity, the bottom wall is provided with the first sealing portion, and the surrounding wall is provided with the second sealing portion.

[0014] Optionally, the bottom wall is provided with an upwardly protruding protrusion, and the protrusion is arranged in a stepped structure with a smaller and smaller cross-section from bottom to top, and the top of the protrusion forms the first sealing portion.

[0015] Optionally, the central area of ​​the bottom wall is configured to be hollowed out, and the hollowing out is used to be opposite to the central area of ​​the display screen.

[0016] The present application provides a sealant injection tool, including an interference adjustment portion, wherein a viscous material is capable of flowing when squeezed by a first sealing portion and a display screen, thereby adaptively adjusting the amount of interference between the first sealing portion and the display screen. The viscous material also alleviates and absorbs the pressure exerted by the first sealing portion on the display screen, reducing the probability of indentations on the display screen due to excessive interference. The hole structure provides deformation space for the first sealing portion, thereby increasing the amount of deformation of the first sealing portion and similarly reducing the probability of indentations on the display screen due to excessive interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the structure of part of the screen assembly;

[0018] Figure 2 is a cross-sectional view of a partial structure of a sealant injection tooling shown in an exemplary embodiment of the present application;

[0019] Figure 3 It is a cross-sectional view of a partial structure of a sealant injection tool shown in another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0020] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0021] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0022] Please refer to Figure 1 , Figure 1 A cross-sectional view of part of the screen assembly structure.

[0023] The screen assembly includes a display screen 1 and a protective cover plate 2. The protective cover plate 2 is stacked on the upper surface of the display screen 1 to shield and protect the display screen 1. The protective cover plate 2 is typically made of a glass cover. The edges of the protective cover plate 2 extend beyond the edges of the display screen 1. The display screen 1 and protective cover plate 2 are sealed at their edges by a sealant 3. The sealant 3 can be applied using a sealant injection tool at the sealing point between the display screen 1 and the protective cover plate 2. The sealed display screen 1 and protective cover plate 2 are then assembled into an electronic device, including but not limited to mobile phones, tablet computers, watches, and the like.

[0024] Please refer to Figure 2 , Figure 2 This is a cross-sectional view of a partial structure of a sealant injection tool 100 according to an exemplary embodiment of the present application.

[0025] The present application provides a sealant injection tool 100, which can reduce or avoid indentations on the display screen 1 and improve the yield rate during the screen assembly manufacturing process.

[0026] Specifically, the tooling 100 includes a support base 10, a flexible member 20 fixed to the upper surface of the support base 10, and an interference adjustment unit 30. The support base 10 can be, but is not limited to, a glass plate. In one embodiment, the support base 10 is embedded in an injection mold. An adhesive is applied to the support base 10, and the flexible member 20 is injection-molded and fixed to the support base 10.

[0027] The flexible member 20 is made of a flexible and deformable material, including but not limited to silicone. The flexible member 20 includes a receiving cavity 21, a first sealing portion 22, and a second sealing portion 23. The receiving cavity 21 is separated by the first sealing portion 22 and the second sealing portion 23 to form a glue injection cavity 210 for injecting sealant.

[0028] The accommodating cavity 21 can be set according to the shape of the screen assembly. In this embodiment, the accommodating cavity 21 is a square-shaped accommodating cavity. The screen assembly is accommodated and positioned in the accommodating cavity 21, and the protective cover 2 is located above the display screen 1. The screen assembly can be positioned in the accommodating cavity 21 using a fixture.

[0029] The first sealing portion 22 is used to seal the display screen 1 in the accommodating cavity 21. The first sealing portion 22 actually extends along the edges of the display screen 1 and has an annular structure, thereby forming an annular sealing surface between the first sealing portion 22 and the display screen 1. Figure 2 In the embodiment shown, the first sealing portion 22 presses against the edges of the display screen 1 from the bottom of the display screen 1. The screen assembly can be pressed by a jig to move the display screen 1 downward to a preset position and interfere with the first sealing portion 22. At this time, the first sealing portion 22 is compressed and deformed to achieve sealed contact with the display screen 1.

[0030] The second sealing portion 23 is used to seal with the protective cover plate 2 in the accommodating cavity 21. The second sealing portion 23 is actually in sealing contact with the protective cover plate 2 at all angles in the circumferential direction of 360°. Thus, another annular sealing surface is formed between the second sealing portion 23 and the protective cover plate 2. The space between the two annular sealing surfaces is the injection cavity 210. Figure 2 In the illustrated embodiment, the second sealing portion 23 abuts against the side surface of the protective cover plate 2 , and the sealing contact between the second sealing portion 23 and the protective cover plate 2 is achieved by the squeezing force between the second sealing portion 23 and the protective cover plate 2 .

[0031] The sealing portion of the display screen 1 and the protective cover plate 2 is used to face the glue injection cavity 210, so that the sealant injected into the glue injection cavity 210 will be formed and adhered to the sealing portion of the display screen 1 and the protective cover plate 2, thereby achieving sealing between the display screen 1 and the protective cover plate 2. Figure 2 In the illustrated embodiment, the staggered portions of the display screen 1 and the protective cover 2 at their four edges serve as sealing portions, which face the glue injection cavity 210 .

[0032] The interference adjustment portion 30 is used to adjust the interference between the first sealing portion 22 and the display screen 1 when in sealed contact. The interference adjustment portion 30 includes a flowable viscous material and / or a porous structure. The viscous material is disposed between the first sealing portion 22 and the display screen 1, and the porous structure is configured to increase the deformation of the first sealing portion. For example, the viscous material disposed between the first sealing portion 22 and the display screen 1 can be used to compensate for thickness tolerances during the manufacture of the display screen 1. For example, the viscous material can flow when squeezed by the first sealing portion 22 and the display screen 1, thereby adaptively adjusting the interference between the first sealing portion 22 and the display screen 1. The viscous material can also alleviate and absorb the pressure exerted by the first sealing portion 22 on the display screen 1, thereby reducing the probability of indentations on the display screen 1 due to excessive interference. For another example, the porous structure can provide deformation space for the first sealing portion 22, thereby increasing the deformation of the first sealing portion 22 and similarly reducing the probability of indentations on the display screen 1 due to excessive interference. The porous structure can be disposed directly on the first sealing portion 22 or adjacent to it.

[0033] In one specific embodiment, the interference adjustment unit 30 includes the viscous material 31, which is configured as liquid glue. The liquid glue is applied to the display screen 1 at a location in sealing contact with the first sealing portion 22. The liquid glue can be injected into the display screen 1 via a syringe. The advantage of using liquid glue is that the liquid glue flowing into the glue injection cavity 210 can merge with the sealant, and its performance is more similar to that of the sealant, which is beneficial for the sealing effect. Of course, in other embodiments, the viscous material 31 can also be made of other materials such as resins and polymers, and the liquid glue can also be applied to the first sealing portion 22.

[0034] In one embodiment, the thickness of the liquid glue applied to the display screen 1 is 0.3 mm to 0.5 mm, and the viscosity of the liquid glue is 40,000 cps to 60,000 cps. The thickness of the liquid glue can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, or 0.5 mm, and the viscosity of the liquid glue can be 40,000 cps, 45,000 cps, 50,000 cps, 55,000 cps, or 60,000 cps, but are not limited thereto. The thickness of the liquid glue is determined based on the thickness tolerance of the display screen 1 to better adjust the amount of interference when the first sealing portion 22 contacts the display screen 1. The viscosity of the liquid glue is related to the flow rate; the greater the viscosity, the slower the flow rate. Setting the viscosity of the liquid glue between 40,000 cps and 60,000 cps can reduce the fluidity of the liquid glue and ensure that the liquid glue is stable in the preset position.

[0035] Please refer to Figure 3 , Figure 3 This is a cross-sectional view of a partial structure of a sealant injection tool 100 according to another exemplary embodiment of the present application.

[0036] In one embodiment, the interference adjustment portion 30 includes a hole structure 32, which is disposed on a side of the flexible member 20 facing away from the first sealing portion 22 and opposite to the first sealing portion 22. This arrangement creates a deformation space below the first sealing portion 22. When the first sealing portion 22 interferes excessively with the display screen 1, the deformation of the first sealing portion 22 can alleviate the excessive interference, thereby avoiding excessive pressure on the display screen 1 and reducing the indentation caused by the display screen 1.

[0037] In some other embodiments, the hole structure 32 may be directly provided on the first sealing portion 22 , which may also increase the flexibility of the first sealing portion 22 and also increase the deformation of the first sealing portion 22 .

[0038] exist Figure 3 In the embodiment shown, the hole structure 32 extends through the lower surface of the flexible member 20 in a direction opposite to the first sealing portion 22. In other words, the hole structure 32 is configured as an open structure, and the larger the hole volume, the better the deformation ability of the first sealing portion 22.

[0039] In one embodiment, the flexible member 20 is fixedly connected to the upper surface of the support base 10. The support base 10 is provided with a through hole 11 extending through the thickness thereof, and the through hole 11 is opposite to the first sealing portion 22. In an embodiment in which the flexible member 20 and the support base 10 are integrally injection molded, the through hole 11 facilitates insertion of a mold therethrough.

[0040] In one embodiment, the flexible member 20 further includes an inner portion 24 that extends into and is fixed within the through-hole 11. The hole structure extends through the inner portion 24 to the lower surface of the flexible member 20. This arrangement allows the flexible member 20 to be connected to the support base 10 within the through-hole 11, thereby enhancing the reliability of the connection between the flexible member 20 and the support base 10 and the sealing performance of the through-hole 11. Furthermore, the provision of the inner portion 24 further facilitates the molding of the flexible member 20 through injection molding.

[0041] In one embodiment, Figure 2As shown, the flexible member 20 includes a bottom wall 201 and surrounding walls 202 extending from the bottom wall 201. The bottom wall 201 and the surrounding walls 202 together define the accommodating cavity 21. The bottom wall 201 is provided with a first sealing portion 22, and the surrounding walls 202 are provided with a second sealing portion 23. With this arrangement, when the screen assembly is placed in the accommodating cavity 21, the first sealing portion 22 can conveniently seal against the display screen 1 located below the glass cover plate 2, and the second sealing portion 23 can conveniently contact the side of the glass cover plate 2, thereby better exposing the sealing position of the display screen 1 and the glass cover plate 2 within the glue injection cavity 210.

[0042] In one embodiment, the bottom wall 201 is provided with an upwardly projecting protrusion 203. The protrusion 203 is arranged in a stepped structure with a decreasing cross-section from bottom to top, and the top of the protrusion 203 forms the first sealing portion 22. This arrangement ensures that the cross-sectional area of ​​the first sealing portion 22 is small, making it more susceptible to deformation when in contact with the display screen 1, while also preventing the first sealing portion 22 from protruding too large and resulting in reduced strength, thereby reducing the risk of the first sealing portion 22 being crushed or broken.

[0043] In one embodiment, the central area of ​​the bottom wall 201 is configured as a hollow 204, and the hollow 204 is configured to face the central area of ​​the display screen 1. The central area of ​​the bottom wall 201 is away from the glue injection cavity 210, and the hollow 204 can reduce the material of the flexible member 20 and save costs.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A sealant injection tool, characterized in that: include: a flexible member made of a flexible and deformable material, the flexible member comprising a receiving cavity, a first sealing portion, and a second sealing portion; the receiving cavity being separated by the first and second sealing portions to form a glue injection cavity for injecting sealant; the display screen and the protective cover plate being capable of being received and positioned within the receiving cavity; the first sealing portion being configured to be in sealing contact with the display screen within the receiving cavity; the second sealing portion being configured to be in sealing contact with the protective cover plate within the receiving cavity; and the sealing portion between the display screen and the protective cover plate being configured to face the glue injection cavity; The interference adjustment portion includes a fluid viscous material and / or a hole structure. The viscous material is used to be arranged between the first sealing part and the display screen. The hole structure is configured to increase the deformation of the first sealing part.

2. The sealant injection tool according to claim 1, characterized in that: The interference amount adjustment portion includes the viscous material, which is configured as liquid glue. The liquid glue is applied to a position on the display screen that is in sealing contact with the first sealing portion.

3. The sealant injection tool according to claim 2, characterized in that: The thickness of the liquid glue coated on the display screen is 0.3 mm to 0.5 mm, and the viscosity of the liquid glue is 40,000 cps to 60,000 cps.

4. The sealant injection tool according to claim 1, characterized in that: The interference adjustment portion includes the hole structure, and the hole structure is provided on a side of the flexible member facing away from the first sealing portion and opposite to the first sealing portion.

5. The sealant injection tool according to claim 4, characterized in that: The hole structure passes through to the lower surface of the flexible member along a direction opposite to the first sealing portion.

6. The sealant injection tool according to claim 5, characterized in that: The sealant injection tool further includes a support base, the flexible member is fixedly connected to the upper surface of the support base, and the support base is provided with a through hole penetrating along its thickness direction, and the through hole is opposite to the hole structure.

7. The sealant injection tool according to claim 6, characterized in that: The flexible member further includes an inner portion extending into the through hole, and the hole structure passes through the inner portion to the lower surface of the flexible member.

8. The sealant injection tool according to any one of claims 1 to 7, characterized in that: The flexible member includes a bottom wall and surrounding walls extending upward from four edges of the bottom wall. The bottom wall and the surrounding walls together form the accommodating cavity. The bottom wall is provided with the first sealing portion, and the surrounding wall is provided with the second sealing portion.

9. The sealant injection tool according to claim 8, characterized in that: The bottom wall is provided with an upwardly protruding protrusion, and the protrusion is arranged in a stepped structure with a smaller and smaller cross-section from bottom to top, and the top of the protrusion forms the first sealing part.

10. The sealant injection tool according to claim 8, characterized in that: The central area of ​​the bottom wall is configured to be hollowed out, and the hollowing out is used to be opposite to the central area of ​​the display screen.

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