Sealant injection tool
Through the combined structure of flexible parts and protrusions, the deformation problem caused by local thinning of the sealant is solved, and the thickness of the sealant is reduced without affecting the sealant effect, which improves the stability and molding quality of the sealant.
Patent Information
- Application Number
- CN202422623478.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the case of insufficient equipment space, local thinning of the sealant leads to deformation.
The combined structure of flexible parts and protrusions is adopted, and the side of the injection cavity is moved upward by the projection against the top of the flexible parts, thereby reducing the thickness of the sealant, and using the anti-pin force of the projection to balance the extrusion pressure to control the deformation of the injection cavity.
Effectively reduce or avoid deformation of sealant, achieve thinning of sealant thickness without thickening the material under the glue cavity, and improve the stability and molding effect of sealant.
Smart Images
Figure CN223266304U_ABST
Abstract
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 screen assembly and the middle frame are bonded and sealed through low-pressure glue injection. However, due to insufficient space in some glue injection areas, the thickness of the sealant on the screen assembly needs to be reduced.
[0003] The screen assembly includes a display screen and a protective cover plate located above the display screen. The sealant is used to seal the display screen and the glass cover plate. For example, the sealant can be injected into the sealing parts of the display screen and the glass cover plate using a sealant injection tool. However, if the thickness of the sealant needs to be locally thinned due to insufficient equipment space, this can be achieved directly by thickening the thickness of the material below the injection cavity, but this will cause local deformation of the sealant. Summary of the Invention
[0004] The present application provides a sealant injection tool that can improve the phenomenon of local deformation of the sealant.
[0005] A sealant injection tool, comprising:
[0006] 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;
[0007] The protruding portion protrudes and presses against the side of the flexible component facing away from the glue injection cavity, and the protruding direction of the protruding portion is set to be consistent with the thickness direction of the sealant.
[0008] Optionally, the sealant injection tool further includes a support base, the flexible member is fixed to the upper surface of the support base, and the protrusion is formed on the upper surface of the support base.
[0009] Optionally, the support base is provided with a bend protruding toward the flexible member, and the protrusion is formed at the bend of the support base.
[0010] Optionally, the protrusion is formed by solidifying liquid glue; or
[0011] The protrusion is formed by 3D printing and fixed to the support base.
[0012] Optionally, in the direction in which the edge of the protective cover plate protrudes from the edge of the display screen, both ends of the protruding portion exceed the glue injection cavity.
[0013] Optionally, the thickness of the portion of the protrusion facing the glue injection cavity is equal, and the thickness at both ends gradually decreases.
[0014] Optionally, the hardness of the protrusion is greater than the hardness of the flexible member.
[0015] 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.
[0016] 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.
[0017] 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.
[0018] This application provides a sealant injection tool, wherein a protrusion protrudes and presses against the side of the flexible member facing away from the injection cavity, thereby causing the flexible member below the injection cavity to move upward. This principle reduces the thickness of the sealant, eliminating the need to thicken the flexible member below the injection cavity. In this way, when the first sealing portion and the display screen squeeze and interfere with each other, the pressing force of the protrusion can balance the squeezing force, controlling deformation of the injection cavity and thereby reducing or even preventing deformation of the sealant. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of the structure of part of the screen assembly;
[0020] Figure 2 This is a cross-sectional view of the sealant injection tooling structure;
[0021] Figure 3 This is another cross-sectional view of part of the screen assembly structure, where the sealant is deformed;
[0022] Figure 4 is a cross-sectional view of a partial structure of a sealant injection tool shown in another exemplary embodiment of the present application;
[0023] Figure 5 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
[0024] 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.
[0025] 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.
[0026] Please refer to Figure 1 , Figure 1 A cross-sectional view of part of the screen assembly structure.
[0027] 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 and serves to shield and protect the display screen 1. The protective cover plate 2 is typically a glass cover plate. The edges of the protective cover plate 2 protrude beyond the edges of the display screen 1. The display screen 1 and protective cover plate 2 are sealed at these edges with 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 serve as a screen assembly and are assembled into electronic devices, including but not limited to mobile phones, tablet computers, and watches.
[0028] Please refer to Figure 2 and Figure 3 , Figure 2 A cross-sectional view of the sealant injection tooling structure. Figure 3 Another cross-sectional view of a portion of the screen assembly structure, showing deformed sealant.
[0029] like Figure 2 As shown, when the thickness of the sealant 3 at a local position needs to be thinned, it can be achieved by directly thickening the bottom 4 of the cavity where the sealant 3 is located, but this will result in the following Figure 3 The sealant 3 is shown deformed.
[0030] Please refer to Figure 4 , Figure 4 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.
[0031] The present application provides a sealant injection tool 100 , which can reduce or avoid deformation of the sealant 3 .
[0032] Specifically, the tooling 100 includes a support base 10, a flexible member 20 fixed to the support base 10, and a protrusion 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.
[0033] 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 the sealant 3.
[0034] 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.
[0035] 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 4 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.
[0036] 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 4 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 .
[0037] 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 1 As shown, the staggered portions of the display screen 1 and the protective cover plate 2 at the four edges are sealing portions, and the sealing portions face the glue injection cavity 210 .
[0038] The protrusion 30 protrudes and presses against the side of the flexible member 20 facing away from the injection cavity 210. The protrusion direction of the protrusion 30 is ( Figure 4 The F direction in the figure is set to be consistent with the thickness direction of the sealant 3. The bottom 4 of the injection cavity 210 can move upward under the action of the supporting force, thereby reducing the thickness of the sealant 3 after molding. In this solution, there is no need to thicken the bottom 4 below the injection cavity 210. Instead, the thickness of the sealant 3 is reduced by the protrusion 30 pressing against the bottom of the flexible member 20 to move the bottom 4 of the injection cavity 210 upward. In this way, when the first sealing portion 22 and the display screen 1 squeeze each other to form interference, the supporting force of the protrusion 30 can balance the squeezing force, thereby controlling the deformation of the injection cavity 210, thereby reducing or even avoiding the deformation of the sealant 3. The protrusion amount of the protrusion 30 can be determined according to the thickness of the sealant 3 that needs to be thinned.
[0039] In one embodiment, the flexible member 20 is fixed to the upper surface of the support base 10, and the protrusion 30 is formed on the upper surface of the support base 10. In this solution, the protrusion 30 is more convenient to protrude toward the flexible member 20, thereby applying a resisting force to the flexible member 20 below the injection cavity 210.
[0040] In one embodiment, the support base 10 is provided with a bend 11 protruding toward the flexible member 20, and the protrusion 30 is formed at the bend of the support base 10. In this embodiment, the protrusion 30 is not provided separately, but is formed by bending the support base 10, which is simple and easy to implement.
[0041] Please refer to Figure 5 , Figure 5 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.
[0042] In another embodiment, the protrusion 30 can also be provided separately. For example, the protrusion 30 is formed by curing liquid glue. Liquid glue itself has viscosity. Using liquid glue can increase the bonding strength with the support base 10. After curing, the bonding strength with the support base 10 is stronger. Liquid glue includes but is not limited to UV glue. For example, the protrusion 30 is formed by 3D printing and fixedly connected to the support base 10. For example, PC (polycarbonate) material or PMMA (polymethyl methacrylate) material can be used, but is not limited to this.
[0043] exist Figure 5 In the embodiment shown, the edge of the protective cover 2 protrudes from the edge of the display screen 1 ( Figure 5 In the X direction), both ends 301 and 302 of the protrusion 30 exceed the glue injection cavity 210. Such a configuration can support the flexible member 20 below the glue injection cavity 210 in a larger range, further reducing the deformation of the glue injection cavity 210.
[0044] In one embodiment, the thickness of the two ends of the protrusion 30 gradually decreases. This arrangement, on the one hand, facilitates increasing the bonding area between the protrusion 30 and the support base 10 to ensure the bonding firmness, and on the other hand, it can also reduce the impact of the protrusion 30 on other parts of the flexible part 20.
[0045] In one embodiment, the hardness of the protrusion 30 is greater than that of the flexible member 20 , which can reduce the deformation of the protrusion 30 , provide a stronger supporting force for the flexible member 20 , and ensure that the internal shape of the injection cavity 210 does not change.
[0046] In one embodiment, Figure 5 As 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.
[0047] 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.
[0048] 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.
[0049] 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 protruding portion protrudes and presses against the side of the flexible component facing away from the glue injection cavity, and the protruding direction of the protruding portion is set to be consistent with the thickness direction of the sealant.
2. The sealant injection tool according to claim 1, characterized in that: The sealant injection tool further includes a support base, the flexible member is fixed to the upper surface of the support base, and the protrusion is formed on the upper surface of the support base.
3. The sealant injection tool according to claim 2, characterized in that: The support base is provided with a bend protruding toward the flexible member, and the protrusion is formed at the bend of the support base.
4. The sealant injection tool according to claim 2, characterized in that: The protrusion is formed by solidifying liquid glue; or The protrusion is formed by 3D printing and fixed to the support base.
5. The sealant injection tool according to claim 4, characterized in that: In the direction in which the edge of the protection cover plate protrudes from the edge of the display screen, both ends of the protruding portion exceed the glue injection cavity.
6. The sealant injection tool according to claim 5, characterized in that: The thickness of the portion of the protruding portion facing the glue injection cavity is equal, and the thickness at both ends gradually decreases.
7. The sealant injection tool according to any one of claims 1 to 4, characterized in that: The hardness of the protrusion is greater than the hardness of the flexible member.
8. The sealant injection tool according to any one of claims 1 to 4, 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.