Bubble discharging clamp for attaching back adhesive to touch screen

Abstract

The utility model relates to a touch screen attaching back glue bubble removing clamp which comprises a base, a positioning groove is formed in the base, the positioning groove comprises four sections distributed in the circumferential direction, each section of positioning groove structurally comprises a groove bottom and guide frames arranged on the two sides of the groove bottom, the groove bottom of each section of positioning groove inclines from the middle to the two ends, and the guide frames are arranged on the two sides of the groove bottom. The guide frame inclines from the middle to the two ends. Two groups of rollers are arranged in each section of positioning groove, each group comprises at least one roller, and the two groups of rollers are respectively arranged on a guide frame of the positioning groove and can respectively move to two ends from the middle of the positioning groove or respectively move to the middle from the two ends under the action of downward pressure; an elastic piece is arranged between each roller and the base and used for providing pre-tightening force after the downward pressing force is relieved, so that the rollers return to the initial positions of the positioning grooves. According to the utility model, the problem that the screen cover plate has many and large bubbles after being attached to the double-sided adhesive tape is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of adhesive backing attachment of display screens, in particular to an adhesive backing bubble removal clamp for attaching an adhesive backing to a touch screen. Background Art

[0002] During the assembly process of the touch screen module, it is necessary to apply double-sided adhesive to the cover plate on the back of the touch screen. Usually, a special clamp is used to apply double-sided adhesive to the edges of the cover plate. During the attachment process, since the cover plate is rigid and the double-sided adhesive is soft and easily deformed, bubbles will inevitably be generated on the contact surface of the two during attachment. At present, when conventional clamps are used to attach double-sided adhesive to the touch screen cover plate, more and larger bubbles are generated. This does not meet the current customer demand for small and few bubbles or even zero bubbles. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a touch screen adhesive backing bubble removal fixture, the purpose of which is to improve the bubble problem between the double-sided adhesive and the screen cover.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A touch screen adhesive backing bubble removal fixture, comprising a base, a positioning groove is provided in the base, the positioning groove comprises four sections distributed along the circumferential direction, the structure of each section of the positioning groove comprises a groove bottom and guide frames arranged on both sides of the groove bottom, the groove bottom of each section of the positioning groove is inclined from the middle to both ends, and the guide frame is also inclined from the middle to both ends;

[0006] Two groups of rollers are arranged in each section of the positioning groove, each group includes at least one roller, and the two groups of rollers are respectively arranged on the guide frames of the positioning groove, and can roll from the middle of the positioning groove to both ends respectively, or from both ends of the positioning groove to the middle respectively under the action of downward pressure;

[0007] An elastic member is provided between each roller and the base, and is used to provide a pre-tightening force after the downward pressure is released, so that the roller returns to the initial position of the positioning groove.

[0008] Further technical solutions are:

[0009] The structure of the roller includes an inner roller and an outer cylinder arranged outside the inner roller, a rolling bearing is arranged between the inner wall of the outer cylinder and the outer wall of the inner roller, and connecting parts are respectively arranged at both ends of the inner roller, which are used to cooperate with the guide frames on both sides of the groove bottom.

[0010] The guide frame is provided with a guide groove for cooperating with the connecting portion.

[0011] The connecting portion is connected to one end of the elastic member, and the other end of the elastic member is connected to the groove bottom or the area on the base located below the groove bottom.

[0012] A gap is formed between the roller and the groove bottom.

[0013] The guide frame has an inclination angle of 5-20° from the middle to both ends.

[0014] The inclination angle of the guide frame is consistent with the inclination angle of the groove bottom.

[0015] The axial direction of the roller is perpendicular to the length direction of the positioning groove.

[0016] The two groups of rollers located in each section of the positioning groove are arranged in parallel.

[0017] The elastic member is a spring or an elastic band.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model adopts a structure in which a roller is arranged in the positioning groove, so that when the roller is subjected to downward pressure during the pasting process and moves along the positioning groove from the middle to the end or from the end to the middle, the bubbles between the double-sided adhesive and the screen cover can be discharged, thereby meeting the requirement of small, few or even zero bubbles after the screen cover is attached with the double-sided adhesive, and improving the flatness and aesthetics of the appearance of the back of the screen cover after attachment.

[0020] The utility model provides stable support for the movement of the roller by arranging guide frames on both sides of the positioning groove, and reduces the friction force of the roller rolling at the same time.

[0021] Other features and advantages of the present invention will be described in the following description or will be understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of an embodiment of the utility model.

[0023] Figure 2 for Figure 1 Sectional view of section AA.

[0024] Figure 3 The figure is a schematic diagram of the matching structure of a roller and a positioning groove in which the roller is located according to an embodiment of the utility model.

[0025] Figure 4 This is a cross-sectional view of a group of rollers in accordance with an embodiment of the utility model that cooperate with the positioning grooves when subjected to downward pressure.

[0026] Figure 5 This is a schematic diagram of the initial state when the embodiment of the utility model is used.

[0027] Figure 6 This is a schematic diagram of the first state of the movement process of the drum when the embodiment of the utility model is used.

[0028] Figure 7 This is a schematic diagram of the second state of the roller movement process when the embodiment of the utility model is used.

[0029] Figure 8 It is a partially enlarged schematic diagram of the roller contacting the touch screen in the initial state when the embodiment of the utility model is used.

[0030] In the figure: 1, base; 2, positioning groove; 3, roller; 5, elastic member; 6, release film; 7, double-sided adhesive; 8, touch screen cover; 9, touch screen sensor; 21, groove bottom; 22, guide frame; 31, outer cylinder; 32, rolling bearing member; 33, inner roller. DETAILED DESCRIPTION

[0031] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0032] See also Figures 1 to 3 The touch screen adhesive bubble removal fixture of this embodiment includes a base 1, a positioning groove 2 is provided in the base 1, and the positioning groove 2 includes four sections distributed along the circumferential direction. The structure of each section of the positioning groove 2 includes a groove bottom 21 and guide frames 22 arranged on both sides of the groove bottom 21. The groove bottom 21 of each section of the positioning groove 2 is inclined downward from the middle to both ends, and the guide frame 22 is also inclined downward from the middle to both ends;

[0033] Two groups of rollers 3 are provided in each section of the positioning groove 2, each group including at least one roller, and the two groups of rollers 3 are respectively provided on the guide frames 22 of the positioning groove 2, and can roll from the middle of the positioning groove 2 to both ends under the action of downward pressure;

[0034] An elastic member 5 is provided between each roller 3 and the base 1 , and is used to provide a pre-tightening force to return the roller 3 to the middle position of the positioning groove 2 after the downward pressure is released.

[0035] See also Figure 4 The structure of the drum 3 includes an inner roller 33 and an outer cylinder 31 arranged outside the inner roller 33, a rolling bearing 32 is arranged between the inner wall of the outer cylinder 31 and the outer wall of the inner roller 33, and connecting parts are respectively provided at both ends of the inner roller 33, which are used to cooperate with the guide frames 22 on both sides of the groove bottom 21.

[0036] Specifically, the guide frame 22 is provided with a guide groove for cooperating with the connecting portion.

[0037] Specifically, a gap is formed between the roller 3 and the groove bottom 21. When the roller 3 rolls, it can avoid being interfered by the groove bottom 21.

[0038] Specifically, the guide frame 22 is inclined at an angle of 5-20° from the middle to the two ends.

[0039] Preferably, the inclination angle of the guide frame 22 is consistent with the inclination angle of the groove bottom 21 .

[0040] Specifically, the connecting portion disposed at the end of the inner roller 33 is connected to one end of the elastic member 5 , and the other end of the elastic member 5 is connected to the groove bottom 21 or the area of ​​the base 1 located below the groove bottom 21 .

[0041] The elastic member 5 is specifically a spring or an elastic band.

[0042] Specifically, the two groups of rollers 3 located in each section of the positioning groove 2 are arranged in parallel.

[0043] Specifically, the outer cylinder 31 is sleeved on the outside of the inner roller 33, and the rolling bearing member 32 is at least two groups of balls evenly arranged along the axial direction of the drum 3, and the balls in each group are evenly distributed along the circumference.

[0044] Specifically, the axial direction of the roller 3 is perpendicular to the length direction of the positioning groove 2. Among them, two of the four circumferentially distributed positioning grooves 2 extend along the length direction of the base 1, and the other two extend along the width direction of the base 1, that is, the axial directions of the rollers 3 in two adjacent positioning grooves 2 are perpendicular to each other, and the axial directions of the rollers 3 in two opposite positioning grooves 2 are parallel to each other.

[0045] Preferably, the numbers of rollers 3 arranged in the four sections of positioning grooves 2 distributed along the circumferential direction are the same.

[0046] Preferably, the inclination angles and directions of the bottoms of the positioning grooves of each section and the bracket are set to be the same.

[0047] See also Figures 5 to 7 , which are the three states of the fixture during use. Figure 5 (a) is a top view, and (b) is a cross-sectional view taken along line AA in (a). Figure 6 , Figure 7 (a) is a top view, and (b) is a central cross section of (a) (with Figure 5 The working process of this embodiment is as follows:

[0048] like Figure 5 As described above, the touch screen is placed in the base 1 so that the four sides of the touch screen are placed in the four positioning grooves 2 respectively. The double-sided adhesive 7 with a release film 6 on one side is pre-laid in the positioning grooves 2. At this time, the positioning grooves 2 are respectively filled with the touch screen cover 8, the touch screen sensor 9, the double-sided adhesive 7 and the release film 6 from top to bottom. In the initial state, the two rollers 3 in each positioning groove 2 are initially located in the middle of the positioning groove 2. At this time, the touch screen is applied as follows Figure 5 The downward pressure indicated by the arrow direction in (b) causes the rollers 3 in each segment of the positioning groove 2 to be synchronously moved along the inclined positioning groove 2 from the middle to the two ends (i.e. Figure 6The movement direction is shown by the arrow in (a), that is, the movement is toward the outside of the base 1. Figure 6 The state shown in FIG. 1 is that the roller 3 continuously moves toward both ends and finally moves to the top of the positioning groove 2 as shown in FIG. Figure 7 See Figure 8 Since the double-sided adhesive 7 is soft, the part in contact with the supporting surface of the roller 3 is lifted up by the roller 3, while the part not in direct contact with the roller 3 is bent downward. The rigid touch screen cover plate 8 is located on the upper side of the double-sided adhesive 7. During the downward pressure process, the roller 3 lifts the double-sided adhesive 7 upward from the bottom to make it adhere to the lower surface of the touch screen cover plate 8. At the same time, during the rolling process of the roller 3 to both ends, the bubbles between the touch screen cover plate 8 and the double-sided adhesive 7 are gradually squeezed outward until they are squeezed out from the outermost edge to achieve exhaust. When the attachment is completed, the downward pressure is released, and the roller 3 returns to the initial position under the restoring force of the elastic member 5 so as to carry out the next work.

[0049] As another embodiment, the bottom of the positioning groove and the bracket can also be set to a structure that is inclined downward from both ends to the middle, that is, the initial position of the roller is at both ends, and the end position is in the middle, that is, the rollers in each section of the positioning groove are synchronously moved along the inclined positioning groove from both ends to the middle (with the same Figure 6 The movement in the opposite direction of the arrow in (a), that is, the movement toward the inner side of the base, can also achieve the purpose of rolling under the action of downward pressure to achieve exhaust.

[0050] Those skilled in the art can understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A touch screen adhesive bubble removal fixture, comprising a base (1), wherein the base (1) is provided with a positioning groove (2), wherein the positioning groove (2) comprises four sections distributed along the circumferential direction, and wherein: The structure of each section of the positioning groove (2) comprises a groove bottom (21) and guide frames (22) arranged on both sides of the groove bottom (21); the groove bottom (21) of each section of the positioning groove (2) is inclined from the middle to both ends, and the guide frames (22) are also inclined from the middle to both ends; Two groups of rollers (3) are provided in each section of the positioning groove (2), each group including at least one roller, and the two groups of rollers (3) are respectively arranged on the guide frames (22) of the positioning groove (2), and can roll from the middle of the positioning groove (2) to both ends respectively, or from both ends of the positioning groove (2) to the middle respectively under the action of downward pressure; An elastic member (5) is provided between each roller (3) and the base (1), and is used to provide a pre-tightening force after the downward pressure is released, so that the roller (3) returns to the initial position of the positioning groove (2).

2. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The structure of the roller (3) comprises an inner roller (33) and an outer cylinder (31) arranged outside the inner roller (33), a rolling bearing (32) is arranged between the inner wall of the outer cylinder (31) and the outer wall of the inner roller (33), and connecting parts are respectively arranged at both ends of the inner roller (33) for cooperating with the guide frames (22) on both sides of the groove bottom (21).

3. The touch screen adhesive bubble removal fixture according to claim 2, characterized in that: The guide frame (22) is provided with a guide groove for cooperating with the connecting portion.

4. The touch screen adhesive bubble removal fixture according to claim 2, characterized in that: The connecting portion is connected to one end of the elastic member (5), and the other end of the elastic member (5) is connected to the groove bottom (21) or an area on the base (1) located below the groove bottom (21).

5. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: A gap is formed between the roller (3) and the groove bottom (21).

6. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The guide frame (22) has an inclination angle of 5-20° from the middle to both ends.

7. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The inclination angle of the guide frame (22) is consistent with the inclination angle of the groove bottom (21).

8. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The axial direction of the roller (3) is perpendicular to the length direction of the positioning groove (2) in which it is located.

9. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The two groups of rollers (3) located in each section of the positioning groove (2) are arranged in parallel.

10. The touch screen adhesive bubble removal fixture according to claim 1, characterized in that: The elastic member (5) is a spring or an elastic band.

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