Attaching device for backlight FPC (Flexible Printed Circuit) on backlight iron stand

Abstract

The utility model discloses a device for attaching a backlight FPC (Flexible Printed Circuit) on a backlight iron stand. The device comprises a base plate, a silica gel pressure head, the backlight FPC and the backlight iron stand, heat-conducting glue is attached to the back face of the backlight FPC, release paper is attached to the side, away from the backlight FPC, of the heat-conducting glue, and positioning holes are formed in the tops of the left side and the right side of the release paper. Protrusions are integrally formed on the two sides of the top of the silica gel pressing head, and a positioning column is fixed to the position, corresponding to the positioning hole, of each protrusion. Through the designed structures such as the base plate, the gas collecting cavity, the silica gel pressing head, the adsorption gas channel, the fixing rod and the gas hole channel, automatic attachment can be achieved, positioning adsorption can be conducted on the backlight FPC firstly, then the backlight FPC is stably attached to the backlight iron stand through pushing of the silica gel pressing head, and therefore the backlight FPC can be stably attached to the backlight iron stand. By adopting the mode, the backlight FPC with the patch LED lamp is attached to the backlight iron stand, and each part is uniformly pressed, so that the smoothness of the heat-conducting glue on the backlight FPC can be ensured, and the generation of gaps is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight FPC attachment, in particular to a backlight FPC attachment device on a backlight iron frame. Background Art

[0002] The LED light bar FPC and the backlight iron frame are connected by FPC double-sided thermal conductive adhesive to dissipate the heat generated by the LED light.

[0003] During the specific attachment, if the thermal conductive adhesive between the LED light strip and the iron frame is not well attached, the heat cannot be conducted away in time, and the NTC impedance will become very small, affecting the display effect of the client. When this happens, the client generally monitors the BLU temperature through the NTC impedance. If it exceeds the set threshold, the module BLU will reduce the current, resulting in reduced module brightness.

[0004] In the existing technology, the backlight FPC with SMD LED lights is usually manually attached to the backlight iron frame. On the one hand, this method has the problem of low production efficiency. On the other hand, due to the small spacing between the SMD LED lights, manual attachment is likely to cause the thermal conductive adhesive on the back of the backlight FPC to be not attached to the backlight iron frame smoothly, and a gap will be generated during attachment, thereby affecting the heat dissipation of the backlight FPC and causing the LED lights on the backlight FPC to work abnormally.

[0005] Therefore, in view of the problems existing in the prior art such as those mentioned above, we have specifically designed a device for attaching the backlight FPC to the backlight iron frame to replace the conventional manual attachment. Utility Model Content

[0006] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for attaching a backlight FPC on a backlight iron frame, comprising a pad, a silicone pressure head, a backlight FPC and a backlight iron frame; a thermal conductive adhesive is attached to the back of the backlight FPC, a release paper is attached to the side of the thermal conductive adhesive away from the backlight FPC, and positioning holes are provided on the tops of the left and right sides of the release paper; protrusions are integrally formed on both sides of the top of the silicone pressure head, and a positioning column is fixed on each protrusion at a position corresponding to the positioning hole; an air collecting cavity is provided in the inner cavity of the pad, and adsorption air channels are equidistantly provided in the inner cavity of the silicone pressure head.

[0008] As a further solution of the utility model: one side of the silicone pressure head is fixedly connected to the backing plate by double-sided tape, and the other side of the silicone pressure head is attached to the backlight FPC.

[0009] As a further solution of the utility model: one end of the adsorption air channel adsorbs the backlight FPC, and the other end of the adsorption air channel respectively penetrates the double-sided adhesive and the pad and communicates with the air collecting cavity.

[0010] As a further solution of the utility model: the size of the double-sided tape is the same as the size of the silicone pressure head. When the silicone pressure head is attached to the pad by the double-sided tape, the top of the silicone pressure head and the top of the pad are on the same horizontal line.

[0011] As a further solution of the utility model: a fixing rod is fixed on the other side of the pad, an air hole channel is opened inside the fixing rod, one end of the air hole channel is connected to an external vacuum pump, and the other end of the air hole channel passes through the pad and is connected to the air collecting cavity.

[0012] As a further solution of the utility model: one end of the fixing rod away from the backing plate is connected to an external pneumatic device, and the pneumatic device can be a cylinder, and the power output shaft of the cylinder is connected to the fixing rod.

[0013] As a further solution of the utility model: a plurality of SMD LED lights are also arranged on the front side of the backlight FPC.

[0014] As a further solution of the utility model: an air-avoiding groove is also provided on one side of the silicone pressing head close to the backlight FPC and at a position corresponding to each SMD LED lamp. When the backlight FPC is fitted with the silicone pressing head, the SMD LED lamp is placed in the air-avoiding groove.

[0015] As a further solution of the utility model: the backlight iron frame is located at the back of the backlight FPC, and the backlight FPC is attached to the backlight iron frame after the release paper is torn off by the thermal conductive adhesive.

[0016] As a further solution of the utility model: the size of the positioning column is adapted to the size of the positioning hole. When the backlight FPC is placed on the back of the silicone pressure head, the positioning hole of the release paper on the backlight FPC is positioned and plugged into the positioning column on the silicone pressure head.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] In the present application, automatic attachment can be achieved through the designed pad, air collecting cavity, silicone pressure head, adsorption airway, fixing rod and air hole channel and other structures. The backlight FPC can be positioned and adsorbed first, and then the backlight FPC can be stably attached to the backlight iron frame by pushing the silicone pressure head. In this way, the backlight FPC with the SMD LED lamp is attached to the backlight iron frame, and the pressure is uniform everywhere, so as to ensure the flatness of the thermal conductive adhesive on the backlight FPC and avoid the generation of gaps. While ensuring that the backlight FPC is fixed to the backlight iron frame, the heat generated by the SMD LED lamp is transferred to the backlight iron frame through the thermal conductive adhesive, and finally released through the backlight iron frame, thereby ensuring the heat dissipation of the backlight FPC and the normal operation of the SMD LED lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model as a whole in a top view;

[0020] Figure 2 This utility model Figure 1 A is an enlarged structural diagram;

[0021] Figure 3 It is a schematic diagram of the side cross-sectional structure of the utility model as a whole;

[0022] Figure 4 This is a front view structural diagram of the utility model when the release paper on the backlight FPC is not torn off;

[0023] Figure 5 It is a front view structural schematic diagram of the utility model when the backlight FPC is located on the back of the silicone pressure head.

[0024] The reference numerals and names in the figures are as follows:

[0025] 1. Pad; 101. Gas collecting cavity; 2. Silicone pressure head; 201. Adsorption air channel; 202. Positioning column; 203. Air avoidance groove; 3. Backlight FPC; 301. SMD LED light; 4. Backlight iron frame; 5. Fixing rod; 501. Air hole channel; 6. Double-sided tape; 7. Thermal conductive adhesive; 8. Release paper; 801. Positioning hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5A backlight FPC attaching device on a backlight iron frame includes a pad 1, a silicone pressure head 2, a backlight FPC 3 and a backlight iron frame 4. A plurality of SMD LED lights 301 are also arranged on the front of the backlight FPC 3; a thermal conductive adhesive 7 is attached to the back of the backlight FPC 3, and the thermal conductive adhesive 7 is used for fixing and dissipating the backlight FPC 3. A release paper 8 is attached to the side of the thermal conductive adhesive 7 away from the backlight FPC 3. The backlight iron frame 4 is located on the back of the backlight FPC 3, and the backlight FPC 3 is attached to the backlight iron frame 4 after the release paper 8 is torn off by the thermal conductive adhesive 7. Positioning holes 8 are provided on the tops of the left and right sides of the release paper 8. 01, the release paper 8 is used for protection before the thermal conductive adhesive 7 is attached, and the positioning holes 801 on the release paper 8 can be used to accurately position the backlight FPC3 on the back of the silicone press head 2; both sides of the top of the silicone press head 2 are integrally formed with protrusions, and a positioning column 202 is fixed on each protrusion at a position corresponding to the positioning hole 801, and the positioning column 202 can cooperate with the positioning hole 801; the inner cavity of the pad 1 is provided with an air collecting cavity 101, and the inner cavity of the silicone press head 2 is provided with adsorption air channels 201 at equal distances, and the air collecting cavity 101 is used to communicate with multiple adsorption air channels 201 to facilitate air communication.

[0028] See also Figure 1-3 In the present embodiment, one side of the silicone press head 2 is fixedly connected to the pad 1 by the double-sided tape 6, and the other side of the silicone press head 2 is attached to the backlight FPC 3; one end of the adsorption air channel 201 adsorbs the backlight FPC 3, and the other end of the adsorption air channel 201 respectively passes through the double-sided tape 6 and the pad 1 and is connected to the gas collecting cavity 101; the size of the double-sided tape 6 is the same as that of the silicone press head 2. When the silicone press head 2 is attached to the pad 1 by the double-sided tape 6, the top of the silicone press head 2 and the top of the pad 1 are on the same horizontal line.

[0029] Specifically, the double-sided tape 6 can ensure the firmness of the silicone press head 2 on the pad 1, and the size of the double-sided tape 6 is the same as that of the silicone press head 2, ensuring that the entire side of the silicone press head 2 is covered with double-sided tape 6, and the top of the silicone press head 2 is on the same horizontal line as the top of the pad 1, which can ensure the regularity of the device. The suction force is generated by the adsorption air channel 201 in the silicone press head 2, so that the backlight FPC3 can be stably adsorbed, which is convenient for subsequent attachment to the backlight iron frame 4.

[0030] See also Figure 1-3 In this embodiment, a fixing rod 5 is fixed on the other side of the pad 1, and an air hole channel 501 is opened inside the fixing rod 5. One end of the air hole channel 501 is connected to an external vacuum pump, and the other end of the air hole channel 501 passes through the pad 1 and is connected to the air collecting chamber 101; one end of the fixing rod 5 away from the pad 1 is connected to an external pneumatic device, which can be a cylinder, and a power output shaft of the cylinder is connected to the fixing rod 5.

[0031] Specifically, on the one hand, the fixing rod 5 can be connected to the air collecting cavity 101 through the air hole channel 501, so as to conveniently use the vacuum pump to adsorb the backlight FPC3 on the back side of the silicone pressure head 2; on the other hand, it can be connected to the external pneumatic device, so as to conveniently drive the silicone pressure head 2 to move, thereby using the extrusion force of the silicone pressure head 2 to make the backlight FPC3 and the backlight iron frame 4 tightly attached.

[0032] See also Figure 1 , Figure 2 and Figure 5 In the present embodiment, a gap 203 is provided on one side of the silicone pressing head 2 close to the backlight FPC 3 and at a position corresponding to each SMD LED lamp 301 . When the backlight FPC 3 is attached to the silicone pressing head 2 , the SMD LED lamp 301 is placed in the gap 203 .

[0033] Specifically, the designed air-avoiding groove 203 can effectively avoid damage to the SMD LED lamp 301 when the backlight FPC 3 is attached to the backlight iron frame 4, thereby ensuring the normal function of the SMD LED lamp 301.

[0034] See also Figure 4-5 In this embodiment, the size of the positioning column 202 is adapted to the size of the positioning hole 801. When the backlight FPC 3 is placed on the back of the silicone press head 2, the positioning hole 801 of the release paper 8 on the backlight FPC 3 and the positioning column 202 on the silicone press head 2 are positioned and plugged together.

[0035] Specifically, through the designed positioning column 202 and positioning hole 801, the backlight FPC3 can be accurately positioned at the specified position on the back side of the silicone pressure head 2, and can be accurately fitted with the corresponding backlight iron frame 4 subsequently to avoid attachment deviation and ensure the normal function of the backlight FPC3. At the same time, since the position of the positioning column 202 remains unchanged, each of the backlight FPC3 attached subsequently can be positioned at the accurate position.

[0036] When using:

[0037] First, place the backlight FPC 3 with the thermal conductive adhesive 7 and the release paper 8 behind the silicone press head 2, and align the two positioning holes 801 on the release paper 8 with the positioning posts 202 and insert them, so that the front of the backlight FPC 3 is attached to the back of the silicone press head 2, and the SMD LED lamp 301 on the backlight FPC 3 enters the air-avoiding groove 203, thereby realizing the positioning of the backlight FPC 3 behind the silicone press head 2;

[0038] Start the vacuum pump (not shown) connected to the air hole channel 501, and the vacuum pump generates suction force, so as to adsorb the backlight FPC 3 through the multiple adsorption air channels 201, so as to stabilize the backlight FPC 3 behind the silicone pressure head 2, and then tear off the release paper 8 on the thermal conductive adhesive 7 to make the sticky surface of the thermal conductive adhesive 7 leak out;

[0039] Start the pneumatic device connected to the fixing rod 5 (the pneumatic device is not shown in the figure, it can be a cylinder), and the power output shaft of the pneumatic device pushes the fixing rod 5 to move toward one side of the backlight iron frame 4 until the thermal conductive glue 7 on the backlight FPC 3 is attached to the backlight iron frame 4, and the thermal conductive glue 7 is tightly attached to the backlight iron frame 4 by continuous squeezing through the silicone pressure head 2. The pushing time of the pneumatic device can be appropriately extended during the attachment process to ensure tightness;

[0040] After the attachment is completed, the vacuum pump and the pneumatic device are turned off. After the vacuum pump stops the process, the adsorption air channel 201 no longer adsorbs the backlight FPC3, and the backlight FPC3 can be easily separated from the silicone pressure head 2. The above operation can be repeated to attach the next backlight FPC3 to the backlight iron frame 4, thereby realizing highly automated and efficient production.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for attaching a backlight FPC to a backlight iron frame, characterized in that: It includes a backing plate (1), a silicone pressure head (2), a backlight FPC (3) and a backlight iron frame (4); A thermal conductive adhesive (7) is attached to the back of the backlight FPC (3); a release paper (8) is attached to the side of the thermal conductive adhesive (7) away from the backlight FPC (3); and positioning holes (801) are provided at the tops of both left and right sides of the release paper (8); Both sides of the top of the silicone pressure head (2) are integrally formed with protrusions, and a positioning column (202) is fixed on each protrusion at a position corresponding to the positioning hole (801); The inner cavity of the pad (1) is provided with a gas collecting cavity (101), and the inner cavity of the silicone pressure head (2) is provided with adsorption air channels (201) at equal intervals.

2. The device for attaching a backlight FPC to a backlight iron frame according to claim 1, characterized in that: One side of the silicone pressure head (2) is fixedly connected to the backing plate (1) via a double-sided adhesive tape (6), and the other side of the silicone pressure head (2) is attached to the backlight FPC (3).

3. The device for attaching a backlight FPC to a backlight iron frame according to claim 2, characterized in that: One end of the adsorption air channel (201) adsorbs the backlight FPC (3), and the other end of the adsorption air channel (201) respectively penetrates the double-sided adhesive tape (6) and the backing plate (1) and is connected to the air collecting cavity (101).

4. The device for attaching a backlight FPC to a backlight iron frame according to claim 2, characterized in that: The size of the double-sided adhesive tape (6) is the same as that of the silicone pressure head (2). When the silicone pressure head (2) is attached to the backing plate (1) via the double-sided adhesive tape (6), the top of the silicone pressure head (2) and the top of the backing plate (1) are on the same horizontal line.

5. The device for attaching a backlight FPC to a backlight iron frame according to claim 1, characterized in that: A fixing rod (5) is fixed to the other side of the pad (1), and an air hole channel (501) is provided inside the fixing rod (5). One end of the air hole channel (501) is connected to an external vacuum pump, and the other end of the air hole channel (501) passes through the pad (1) and is connected to the air collecting chamber (101).

6. The device for attaching a backlight FPC to a backlight iron frame according to claim 5, characterized in that: One end of the fixing rod (5) away from the backing plate (1) is connected to an external pneumatic device, which may be a cylinder, and a power output shaft of the cylinder is connected to the fixing rod (5).

7. The device for attaching a backlight FPC to a backlight iron frame according to claim 1, characterized in that: A plurality of SMD LED lights (301) are also arranged on the front side of the backlight FPC (3).

8. The device for attaching a backlight FPC to a backlight iron frame according to claim 7, characterized in that: A side of the silicone pressing head (2) close to the backlight FPC (3) and at a position corresponding to each SMD LED lamp (301) is also provided with an air avoidance groove (203); when the backlight FPC (3) and the silicone pressing head (2) are attached to each other, the SMD LED lamp (301) is placed in the air avoidance groove (203).

9. The device for attaching a backlight FPC to a backlight iron frame according to claim 1, characterized in that: The backlight iron frame (4) is located on the back side of the backlight FPC (3), and the backlight FPC (3) is attached to the backlight iron frame (4) after the release paper (8) is torn off through the thermal conductive adhesive (7).

10. The device for attaching a backlight FPC to a backlight iron frame according to claim 1, characterized in that: The size of the positioning column (202) is adapted to the size of the positioning hole (801). When the backlight FPC (3) is placed on the back side of the silicone pressure head (2), the positioning hole (801) of the release paper (8) on the backlight FPC (3) and the positioning column (202) on the silicone pressure head (2) are positioned and plugged together.

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