An anti-overflow adhesive structure for light guide pillars

Abstract

This utility model relates to the field of dispensing technology and discloses an anti-overflow adhesive structure for a light guide column, including a housing and a light guide column. A sealing element is sleeved on the outer periphery of the light guide column, and the housing is provided with a mounting hole that matches the light guide column. The mounting hole has a taper that expands towards the open end. This utility model uses the sealing element to form a lateral compression fit with the inner wall of the mounting hole and the outer periphery of the light guide column under assembly pressure, forming a preliminary sealing barrier to prevent adhesive from overflowing into the light guide channel. The taper structure of the mounting hole that expands towards the open end can guide the adhesive to be evenly distributed around the light guide column along the taper direction during the assembly process, reducing the degree of adhesive compression and concentration under assembly pressure. This effectively solves the problems of appearance pollution, decreased optical performance, and increased production costs caused by adhesive overflow during the assembly of the light guide column.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, specifically to an anti-overflow adhesive structure for light guide columns. Background Technology

[0002] In existing technologies where light guides are assembled and fixed to housings or other components using adhesives, adhesive overflows onto the surface of the light guide or into the light guide channel due to factors such as pressure during assembly. This presents the following problems: First, overflowing adhesive contaminates the inner and outer surfaces of the light guide, affecting the product's cleanliness and aesthetics, and reducing its visual quality. Second, overflowing adhesive leads to a decrease in optical performance, such as reduced light transmittance and light spot distortion, thus affecting the overall reliability of the product. Third, overflowing adhesive increases subsequent cleaning processes, leading to higher production costs; if the product is scrapped due to overflowing adhesive, it will cause even greater losses. Utility Model Content

[0003] The purpose of this invention is to provide an anti-overflow adhesive structure for light guide columns. By sleeved with a sealing element around the light guide column, a basic sealing interface is formed by the compression and bonding of the sealing element with the inner wall of the housing mounting hole and the outer circumference of the light guide column. At the same time, the housing mounting hole is designed with a tapered structure that expands towards the opening end. This tapering can guide the adhesive to cover the entire perimeter of the light guide column, reducing the risk of adhesive overflowing into unintended areas due to pressure concentration. This effectively solves the problems of appearance pollution, decreased optical performance, and increased production costs caused by adhesive overflow during light guide column assembly.

[0004] This utility model is achieved through the following technical solution:

[0005] An anti-overflow adhesive structure for a light guide post includes a housing and a light guide post. A sealing element is fitted around the outer periphery of the light guide post. The housing is provided with a mounting hole that matches the light guide post, wherein the mounting hole has a taper that expands toward the opening end.

[0006] In this solution, the sealing element forms a lateral compression fit with the inner wall of the mounting hole and the outer periphery of the light guide column under assembly pressure, thus creating a preliminary sealing barrier to prevent adhesive from overflowing into the light guide channel. The tapered structure of the mounting hole, which expands towards the opening end, can guide the adhesive to be evenly distributed around the light guide column along the tapered direction during the assembly process, reducing the degree of adhesive compression and concentration under assembly pressure. This effectively solves the problems of appearance pollution, decreased optical performance, and increased production costs caused by adhesive overflow during the assembly of the light guide column.

[0007] As a further solution to the anti-overflow adhesive structure, the seal is laterally squeezed and bonded to the inner wall of the mounting hole and the outer periphery of the light guide post by assembly pressure, so that the mounting hole forms two collection grooves for receiving adhesive. The two collection grooves are two independent storage spaces. When the adhesive breaks through the initial obstruction of the seal under assembly pressure, the overflowing adhesive will be confined in the upper and lower collection grooves. Through the layered volume design of the two collection grooves, the overflowing adhesive is received and stored step by step, preventing the adhesive from spreading disorderly to the surface of the light guide post, the light guide channel or other areas inside the housing.

[0008] As a further embodiment of the anti-overflow adhesive structure, the collection tank includes a first collection tank and a second collection tank. The upper end of the first collection tank has a tapered shape that expands towards the opening end. This tapered structure at the upper end of the first collection tank can be used to guide the adhesive to be evenly distributed along the tapered direction during the assembly of the light guide column. At the same time, the tapered flaring design slows down the upward overflow speed of the adhesive, intercepting most of the overflowing adhesive in the first collection tank. Meanwhile, the lower end of the first collection tank is connected to the second collection tank through a slow-flow channel. Excess adhesive in the first collection tank flows to the second collection tank through the slow-flow channel. The narrow size of the slow-flow channel can limit the flow rate of the adhesive, preventing a large amount of adhesive from rapidly flowing into the second collection tank. This effectively prevents the adhesive from breaking through the sealing structure and spreading to the surface of the light guide column or other areas inside the housing.

[0009] As a further solution to the anti-overflow adhesive structure, in order to further prevent adhesive from splashing and overflowing onto the surface of the light guide column or into the light guide channel due to concentrated assembly pressure, the upper end of the first collection tank has a taper of 5° to 15°. By aligning the taper direction with the assembly direction, the adhesive can be guided into the first collection tank by utilizing the movement trend of the light guide column pressing into the housing. At the same time, the 5° to 15° angle range can ensure effective flow of adhesive and slow down the upward overflow speed of adhesive through the flared structure, so that the overflowing adhesive forms a buffer space in the first collection tank.

[0010] As a further embodiment of the anti-overflow adhesive structure, the width of the slow-flow channel is 0.1-0.5 mm and the height is 0.3-1.0 mm. The narrow channel size forms a physical constraint on the flow of adhesive, and the flow rate of adhesive from the first collection tank to the second collection tank is significantly reduced by utilizing the principle of fluid mechanics, thus preventing the overflow adhesive from rapidly flowing into the second collection tank due to the channel being too wide or too high.

[0011] As a further solution to the anti-overflow adhesive structure, the edge of the opening of the mounting hole is provided with a chamfered structure with a chamfer angle of 30° to 60°. The chamfer forms a smooth transition guide surface, which reduces the contact resistance between the adhesive and the edge of the mounting hole during the assembly or application of adhesive to the light guide post, and avoids adhesive accumulation or splashing due to the right-angled edge.

[0012] As a further solution to the anti-overflow adhesive structure, the bottom of the second collection tank is provided with a groove along the inner wall of the mounting hole. The groove is connected to the first collection tank. The volume design of the groove forms the ultimate absorption space for the overflowing adhesive. When the adhesive flows into the second collection tank through the slow flow channel, the inner wall of the groove is used to absorb or store a small amount of residual adhesive in the tank, avoiding the problem that the adhesive may still contaminate the light guide column or the inside of the housing after accumulating at the bottom of the second collection tank.

[0013] As a further solution to the anti-overflow adhesive structure, in order to further avoid insufficient capacity due to shallow depth and adhesive overflow contaminating the light guide column or the inside of the housing, the groove depth is 0.2 to 0.8 mm.

[0014] As a further solution to the anti-overflow adhesive structure, in order to achieve a reliable anti-overflow adhesive effect while improving assembly efficiency and reducing product scrap rate due to seal failure, the sealing element is an elastic sealing ring, and the interference fit between the inner diameter of the sealing element and the outer diameter of the light guide post is 0.1 to 0.3 mm.

[0015] As a further solution to the anti-overflow adhesive structure, in order to avoid the anti-overflow adhesive effect being affected by assembly errors caused by multi-process processing, the mounting holes of the housing, the groove and the slow flow channel are integrally injection molded.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] 1. The elastic sealing ring fitted around the light guide post forms a lateral compression fit with the inner wall of the housing mounting hole and the outer periphery of the light guide post, thus constructing the first physical sealing barrier. The housing mounting hole is tapered to guide the adhesive to be evenly distributed around the periphery during the pressing of the light guide post, avoiding pressure concentration that could cause the adhesive to overflow.

[0018] 2. This utility model also utilizes the squeezing action of the sealing component during assembly to separate two independent collection grooves inside the mounting hole. The tapered structure at the upper end of the first collection groove guides the adhesive to distribute evenly along the tapered direction during the light guide column assembly process. Simultaneously, the tapered flaring design slows down the upward overflow of the adhesive, intercepting most of the overflowing adhesive within the first collection groove. When excess adhesive in the first collection groove flows to the second collection groove through a slow-flow channel, the narrow size of the slow-flow channel limits the adhesive flow rate, preventing a large amount of adhesive from rapidly entering the second collection groove. This ensures that the overflowing adhesive forms a "graded buffer-ordered flow" control path within the two collection grooves, effectively preventing the adhesive from breaking through the sealing structure and spreading to the surface of the light guide column or other areas within the housing. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the light guide post and housing in application;

[0021] Figure 2 This is a schematic diagram of the installation structure of the light guide post and the sealing component;

[0022] Figure 3 This is a schematic diagram of the structure of this utility model;

[0023] Figure 4 This is a partially enlarged structural schematic diagram of the present invention.

[0024] The attached diagram shows the markings and corresponding component names:

[0025] 1-Light guide column, 2-Sealing component, 3-Housing shell, 4-First collection tank, 5-Second collection tank, 6-Slow flow channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0027] Example 1

[0028] This embodiment 1 provides an anti-overflow adhesive structure for light guide pillars, such as... Figures 1-4 As shown, it includes a housing 3 and a light guide post 1; wherein, a sealing element 2 is sleeved on the outer periphery of the light guide post 1, and the housing 3 is provided with a mounting hole that matches the light guide post 1, the mounting hole having a taper that expands toward the opening end.

[0029] Please see Figure 1 and Figure 2 As shown, the seal 2 is usually an elastic sealing ring, and the material is mostly silicone rubber or EPDM rubber. The inner diameter of the seal 2 has an interference fit of 0.1 to 0.3 mm with the outer diameter of the light guide post 1. The Shore hardness is between 40 and 60 HA. During assembly, the seal 1 is subjected to pressure and forms a lateral compression fit with the outer periphery of the light guide post 1 and the inner wall of the mounting hole of the housing 3, thereby constructing a physical sealing barrier.

[0030] When the seal 1 forms a lateral compression fit with the outer periphery of the light guide post 1 and the inner wall of the mounting hole of the housing 3, such as Figure 3 and Figure 4As shown, the mounting hole forms two collection grooves for holding glue under the action of the sealing element 2, namely the first collection groove 4 and the second collection groove 5. The first collection groove 4 is located in the upper section of the mounting hole, and its upper end has a taper that expands towards the opening end. The taper is 5° to 15° and the taper direction is consistent with the assembly direction of the light guide post 1. It is used to better receive the glue overflowing during the assembly process and to slow down the flow speed of the glue by using the taper. The second collection groove 5 is located in the lower section of the mounting hole, and its bottom is provided with a groove opened along the inner wall of the mounting hole. The groove depth is 0.2 to 0.8 mm. The groove is connected to the first collection groove 4 and is used to absorb residual glue.

[0031] Please also refer to Figure 4 As shown, the lower end of the first collection tank 4 is connected to the second collection tank 5 through a slow-flow channel 6. The width of the slow-flow channel is 0.1-0.5 mm and the height is 0.3-1.0 mm. It is used to limit the flow rate of glue from the first collection tank 4 to the second collection tank 5, prevent a large amount of glue from rushing into the second collection tank 5, and ensure that the overflowing glue can flow orderly between the two collection tanks, thereby achieving effective control of the overflow.

[0032] In some embodiments, the opening edge of the mounting hole is provided with a chamfered structure, with a chamfer angle of 30° to 60°. The chamfer forms a smooth transition guide surface, which reduces the contact resistance between the adhesive and the edge of the mounting hole during the assembly or application of the light guide post, and avoids adhesive accumulation due to the right-angled edge.

[0033] In some embodiments, to avoid the effect of anti-overflow adhesive caused by assembly errors due to multi-process processing, the mounting holes, grooves and slow-flow channels of the shell 3 are integrally injection molded.

[0034] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An anti-overflow adhesive structure for a light guide post, comprising a housing (3) and a light guide post (1), characterized in that, The outer periphery of the light guide post (1) is fitted with a sealing element (2), and the housing (3) is provided with a mounting hole that matches the light guide post (1), wherein the mounting hole has a taper that expands toward the opening end; The sealing element (2) is laterally squeezed and bonded to the inner wall of the mounting hole and the outer periphery of the light guide post (1) by the assembly pressure, so that the mounting hole forms two collection grooves for holding glue. The collection tank includes a first collection tank (4) and a second collection tank (5). The upper end of the first collection tank (4) has a tapered shape that expands toward the opening end. The lower end of the first collection tank (4) is connected to the second collection tank (5) through a slow-flow channel (6).

2. The anti-overflow adhesive structure for a light guide post according to claim 1, characterized in that, The upper end of the first collection groove (4) has a taper of 5° to 15°, and the taper direction is consistent with the assembly direction of the light guide column (1).

3. The anti-overflow adhesive structure for a light guide post according to claim 1, characterized in that, The width of the slow-flow channel (6) is 0.1-0.5 mm and the height is 0.3-1.0 mm.

4. The anti-overflow adhesive structure for a light guide post according to claim 1, characterized in that, The edge of the opening of the mounting hole is provided with a chamfered structure, and the chamfer angle is 30° to 60°.

5. The anti-overflow adhesive structure for a light guide post according to claim 1, characterized in that, The bottom of the second collection groove (5) is provided with a groove along the inner wall of the mounting hole, and the groove is connected to the first collection groove (4).

6. The anti-overflow adhesive structure for a light guide post according to claim 5, characterized in that, The groove depth is 0.2–0.8 mm.

7. The anti-overflow adhesive structure for a light guide post according to claim 5, characterized in that, The sealing element (2) is an elastic sealing ring, and the interference fit between the inner diameter of the sealing element (2) and the outer diameter of the light guide post (1) is 0.1 to 0.3 mm.

8. An anti-overflow adhesive structure for a light guide post according to any one of claims 5-7, characterized in that, The mounting holes, the grooves, and the slow-flow channels (6) of the housing (3) are integrally injection molded.

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