Sinking plate type board-to-board connector and backlight module

Abstract

The utility model relates to a sinking plate type board-to-board connector and a backlight module. The sinking plate type board-to-board connector comprises a base, and a terminal, a positioning sheet and a rear cover which are fixed on the base, the front end of the base is provided with a golden finger socket, the rear end of the terminal is provided with a pin, and the front end of the terminal is provided with a contact extending into the golden finger socket; positioning blocks are arranged at the left side end and the right side end of the base, inserting grooves formed in the vertical direction and clamping grooves located in the front side and the rear side of the inserting grooves are formed in the positioning blocks, the lower ends of the clamping grooves are open, and stopping tables are arranged in the clamping grooves; clamping edges are arranged on the two side edges of the positioning piece, the positioning piece is inserted into the inserting groove from bottom to top, the clamping edges are inserted into the clamping grooves and clamped in the clamping grooves, the upper ends of the clamping edges are stopped on the stopping table, and the upper end of the positioning piece is provided with a fixed welding piece formed by bending outwards by 90 degrees. The utility model has the advantages of reasonable structural design, reliable fixation and installation, simple and beautiful wiring, stable use performance and good practicability.

Description

Technical Field

[0001] The utility model belongs to the field of electrical connector structure design, and in particular relates to a sunken board-to-board connector and a backlight module using the same. Background Art

[0002] The backlight module is one of the most critical components in liquid crystal displays. It is mainly used to provide light sources for the LCD screen so that the displayed content can be clearly seen. The performance of the backlight module directly affects the brightness, contrast, color reproduction and other aspects of the display. As the area of ​​liquid crystal displays tends to be larger, the backlight module generally includes a plurality of light strips, each of which is welded with a plurality of LED lights, and the light strips are connected to the power board with wires. However, a large number of wires are laid out in a disorderly manner, which easily causes wire confusion, and thus brings inconvenience to assembly and maintenance. In order to solve the above problems, the relevant technology uses a board-to-board connector to electrically connect the power adapter board and the light strip board, thereby eliminating the wire connection method, so that the backlight module layout is simple and orderly; however, in this context, how to improve the gripping force between the connector and the light strip board is an issue that needs attention. Utility Model Content

[0003] In this regard, the utility model aims to provide a sunken-type board-to-board connector and a backlight module using the same. Through structural optimization, it can improve the gripping force between the sunken-type board-to-board connector and the light strip board (circuit board) during installation, thereby ensuring the reliability of electrical connection.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, the utility model provides a sunken board-to-board connector, comprising a base, and terminals and positioning pieces fixed to the base; a gold finger socket is provided at the front end of the base, a pin is provided at the rear end of the terminal, and a contact is provided at the front end of the terminal that extends into the gold finger socket;

[0006] The left and right ends of the base are provided with outwardly protruding positioning blocks, the positioning blocks are provided with slots arranged in the up and down directions and card slots located on the front and back sides of the slots, the card slots are open at the lower end, and a stop platform is provided in the card slots;

[0007] A clamping edge is provided on both sides of the positioning piece, the positioning piece is inserted into the slot from bottom to top, the clamping edge is inserted into the slot and clamped in the slot, the upper end of the clamping edge is stopped at the stop platform, and the upper end of the positioning piece is provided with a fixed welding piece formed by bending outward 90 degrees.

[0008] In some embodiments, the base is provided with a mounting hole and a fixing hole arranged along the front-to-back direction, the front end of the mounting hole is connected to the gold finger socket, and the rear ends of the mounting hole and the fixing hole are open;

[0009] The terminal comprises an elastic arm extending into the mounting hole and a fixing pin tightly fitted and plugged into the fixing hole, and the contact is arranged at the front end of the elastic arm.

[0010] In some embodiments, there are two elastic arms, and the contact points on the two elastic arms are spaced apart and arranged one in front of the other.

[0011] In some embodiments, an insulating baffle is installed at the rear end of the base, a fixed socket is provided at the rear end of the base, and a fixed socket is provided on the insulating baffle to tightly fit with the fixed socket.

[0012] In some embodiments, the upper edge of the insulating baffle is provided with an extension portion extending backward, the upper portion of the extension portion is provided with a slot for the pin to pass through, and the rear end of the pin extends from the rear end of the extension portion and bends downward to form a welding foot.

[0013] In the second aspect, the utility model provides a backlight module, including a light strip board and a power supply adapter board, the side of the power supply adapter board is provided with a protruding gold finger plug, the end edge of the light strip board is provided with a mounting groove, and a sunken board-to-board connector is fixed in the mounting groove; the sunken board-to-board connector adopts any of the sunken board-to-board connectors described above, the pins are welded to the conductive welding positions on the light strip board, the gold finger plug is inserted into the gold finger socket and the conductive layer thereon is in contact with the contact.

[0014] In some embodiments, a recess for accommodating the positioning block is formed at the notch in the installation slot, and a stop step is formed at the inner end of the recess for abutting against the rear end of the positioning block.

[0015] The positive effects of the present invention are as follows: in the present invention, through structural optimization, positioning blocks are provided on both sides of the base, and slots and card slots extending in the up and down directions are provided on the positioning blocks, and card edges are provided on both sides of the positioning piece. When installing, the positioning piece is inserted into the slot from bottom to top, and the card edge is tightly matched with the card slot, so that the positioning piece is reliably fixed on the base; and when the sunken plate-type board-to-board connector is installed into the mounting groove at the edge of the light bar board (circuit board), the sunken plate-type board-to-board connector is sunk into the mounting groove, and the pins are welded to the conductive welding spots on the light bar board to achieve electrical connection, and the lower surface of the fixed welding piece is attached to the upper surface of the light bar board and welded to achieve fixation, so that the welding of the fixed welding piece to the light bar board can provide reliable positioning and fixed support for the connector, improve the gripping force between the connector and the light bar board, and enhance the stability of the overall structure and the reliability of the electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of the sunken plate-type board-to-board connector in the present invention;

[0018] Figure 2 for Figure 1 A top view of the sunken board-to-board connector shown;

[0019] Figure 3 For the Figure 2 Sectional view taken along line AA;

[0020] Figure 4 For the Figure 2 Cross-sectional view cut along the midline BB;

[0021] Figure 5 For the Figure 2 Cross-sectional view taken along the midline CC;

[0022] Figure 6 This is an exploded view of the sunken board-to-board connector of the present invention;

[0023] Figure 7 This is a schematic diagram of the matching state of the connector, gold finger insert, and light strip board in the backlight module of the present invention;

[0024] Figure 8 This is a schematic diagram of the connector, gold finger insert, and light strip board in the backlight module of the present invention in a separated state;

[0025] Figure 9 This is a front view of the backlight module of the present invention.

[0026] Reference numerals shown in the figures:

[0027] 1-base; 11-gold finger socket; 12-positioning block; 13-slot; 14-card slot; 15-stop platform; 16-mounting hole; 17-fixing hole; 18-fixing socket;

[0028] 2-terminal; 21-pin; 22-spring arm; 221-contact; 23-fixed pin; 24-solder foot;

[0029] 3- positioning piece; 31- clamping edge; 32- fixed welding piece;

[0030] 4-insulating baffle; 41-fixed plug-in platform; 42-extension part; 43-bayonet;

[0031] 5-light strip; 51-mounting slot; 52-conductive welding position; 53-allowing slot; 54-resisting step;

[0032] 6-power supply adapter board; 61-gold finger plug. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0036] In the first aspect, the sunken board-to-board connector structure provided in the embodiment of the present invention is as follows Figures 1 to 5As shown, it includes a base 1, a terminal 2 and a positioning piece 3 fixed to the base 1; the front end of the base 1 is provided with a gold finger socket 11, the rear end of the terminal 2 is provided with a pin 21, and the front end of the terminal 2 is provided with a contact 221 extending into the gold finger socket 11; the left and right ends of the base 1 are provided with outwardly protruding positioning blocks 12, and the positioning block 12 is provided with a slot 13 arranged in the up and down direction and a card slot 14 located on the front and rear sides of the slot 13, and the card slot 14 is open at the lower end , and a stop platform 15 is provided in the card slot 14; a card edge 31 is provided on both sides of the positioning piece 3, the positioning piece 3 is inserted into the slot 13 from bottom to top, the card edge 31 is inserted into the card slot 14 and clamped in the card slot 14, the upper end of the card edge 31 stops at the stop platform 15, and the positioning piece 3 can be resisted and limited by the stop platform 15, and the upper end of the positioning piece 3 is provided with a fixed welding piece 32 bent outward by 90 degrees, which is convenient for welding and fixing with the light bar plate.

[0037] By arranging positioning blocks 12 on both sides of the base 1, and arranging slots 13 and card slots 14 extending in the up and down directions on the positioning blocks 12, and correspondingly arranging card edges 31 on both sides of the positioning piece 3, the positioning piece 3 is inserted into the slot 13 from bottom to top during installation, and the card edges 31 are tightly matched with the card slots 14, so that the positioning piece 3 is reliably fixed on the base 1; and when the sunken plate-type board-to-board connector is installed into the mounting groove at the edge of the light strip board (circuit board), the sunken plate-type board-to-board connector is sunk into the mounting groove, and the pins 21 are welded to the conductive welding spots on the light strip board to achieve electrical connection, and the lower surface of the fixed welding piece 32 is attached to the upper surface of the light strip board and welded to achieve fixation, so that the welding of the fixed welding piece 32 to the light strip board can provide reliable positioning and fixed support for the connector, improve the gripping force between the connector and the light strip board, and enhance the stability of the overall structure and the reliability of the electrical connection.

[0038] In some embodiments, the base 1 is provided with a mounting hole 16 and a fixing hole 17 arranged along the front-to-back direction. The front end of the mounting hole 16 is communicated with the gold finger socket 11, and the rear ends of the mounting hole 16 and the fixing hole 17 are open. The terminal 2 has an elastic arm 22 extending into the mounting hole 16 and a fixing pin 23 tightly plugged into the fixing hole 17. During assembly, the terminal 2 is inserted from the rear end of the base 1 from back to front, so that the fixing pin 23 is inserted into the fixing hole 17, and the elastic arm 22 is inserted into the mounting hole 16. In order to facilitate the elastic arm 22 to contact the PCB board, the contact 221 is provided at the front end of the elastic arm 22. After the gold finger on the PCB board is inserted into the gold finger socket 11, the contact 221 elastically contacts the conductive layer on the surface of the gold finger, thereby forming a reliable electrical connection. In actual operation, the width of the conductive layer on the gold finger plug 61 can also be widened so that the contacts 221 on at least two terminals 2 are in contact with the same conductive layer, further improving the conductive performance.

[0039] Optionally, in order to increase the contact area between the terminal 2 and the gold finger plug on the PCB board and improve the reliability of the electrical connection, two elastic arms 22 are provided, and the contacts 221 on the two elastic arms 22 are spaced apart one in front and one behind. In this way, each terminal 2 has two contact points with the same conductive layer on the gold finger plug, ensuring the reliability of the electrical connection. Moreover, when one of the elastic arms 22 is damaged, it will not affect the conductive performance of the other elastic arm 22.

[0040] In the prior art, an aluminum substrate is often used as a light strip board, and the mounting groove is formed by punching. After forming, burrs are inevitable on the edge of the mounting groove, and the burrs are easy to contact with the rear end of the terminal 2, thereby causing a short circuit. In order to avoid this problem, in this embodiment, an insulating baffle 4 is installed at the rear end of the base 1. The insulating baffle 4 is plastic integrally injection molded, and isolation is formed between the rear end of the terminal 2 and the edge of the mounting groove by the insulating baffle 4 to avoid accidental short circuits. In order to facilitate the assembly between the insulating baffle 4 and the base 1, a fixed socket 18 is provided at the rear end of the base 1, and a fixed socket 41 is provided on the insulating baffle 4, which is tightly fitted with the fixed socket 18. By plugging the fixed socket 41 into the fixed socket 18, the insulating baffle 4 can be easily and effectively assembled with the base 1, while ensuring the stable positioning of the insulating baffle 4.

[0041] In order to improve the insulation protection performance of the insulating baffle 4, the upper edge of the insulating baffle 4 is provided with an extension portion 42 extending backward, and the extension portion 42 increases the coverage range of the insulating baffle 4. A bayonet 43 for the pin 21 to pass through is also provided on the upper part of the extension portion 42. The rear end of the pin 21 extends out of the rear end of the extension portion 42 and bends downward to form a welding foot 24. The advantage of this is that the bayonet 43 can fix the position of the pin 21, and the boss formed between the two adjacent bayonets 43 can increase the creepage distance between the pins 21 on adjacent terminals 2, thereby enhancing the insulation performance. In addition, the bayonet 43 cooperates with the pin 21 to limit the insulating baffle 4. When the sunken plate-type board-to-board connector is installed, welding the welding foot 24 to the conductive welding position on the light bar board can realize the electrical connection between the terminal 2 and the light bar board.

[0042] In the second aspect, the backlight module structure provided in the embodiment of the present invention is shown in FIG. Figures 7 to 9As shown, it includes a light strip board 5 and a power supply adapter board 6. The power supply adapter board 6 is used to provide power for the light strip board 5, which is electrically connected to the power module of the backlight module. The side of the power supply adapter board 6 is provided with a protruding gold finger plug 61, and the end edge of the light strip board 5 is provided with a mounting groove 51. A sunken board-to-board connector is fixed in the mounting groove 51. The sunken board-to-board connector adopts the sunken board-to-board connector described in any of the above embodiments. The pin 21 is welded to the conductive welding position 52 on the light strip board 5, and the gold finger plug 61 is inserted into the gold finger socket 11 and the conductive layer thereon is in contact with the contact 221; the sunken board-to-board connector has all the advantages of the above embodiments and will not be repeated here; the sunken board-to-board connector is installed on the light strip board, and the thickness of the corresponding part is small, which is conducive to the miniaturization design of the backlight module, and the connector will not affect the transmission and effect of light.

[0043] Alternatively, as Figure 8 As shown, a recess 53 for accommodating the positioning block 12 is formed at the inner notch of the mounting groove 51, and a stop step 54 is formed at the inner end of the recess 53 for abutting against the rear end of the positioning block 12, thereby strengthening the positioning of the base 1, and the width of the side edge of the root of the mounting groove 51 is relatively large, which can enhance the strength of the corresponding portion of the light strip board 5.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sunken board-to-board connector, comprising a base (1), and a terminal (2) and a positioning piece (3) fixed on the base (1); a gold finger socket (11) is provided at the front end of the base (1), a pin (21) is provided at the rear end of the terminal (2), and a contact (221) is provided at the front end of the terminal (2) for extending into the gold finger socket (11); It is characterized by: The base (1) is provided with positioning blocks (12) protruding outward at both left and right ends. The positioning block (12) is provided with a slot (13) arranged in the up-down direction and a clamping slot (14) located at the front and rear sides of the slot (13). The clamping slot (14) is open at the lower end, and a stopper (15) is provided in the clamping slot (14). The positioning piece (3) is provided with a clamping edge (31) on both sides. The positioning piece (3) is inserted into the slot (13) from bottom to top. The clamping edge (31) is inserted into the clamping slot (14) and clamped in the clamping slot (14). The upper end of the clamping edge (31) is stopped by the stop platform (15). The upper end of the positioning piece (3) is provided with a fixing welding piece (32) bent outward by 90 degrees.

2. The sunken board-to-board connector according to claim 1, characterized in that: The base (1) is provided with a mounting hole (16) and a fixing hole (17) arranged along the front-back direction, the front end of the mounting hole (16) is communicated with the gold finger socket (11), and the rear ends of the mounting hole (16) and the fixing hole (17) are open; The terminal (2) has an elastic arm (22) extending into the mounting hole (16) and a fixed pin (23) tightly plugged into the fixing hole (17), and the contact (221) is arranged at the front end of the elastic arm (22).

3. The sunken board-to-board connector according to claim 2, characterized in that: There are two elastic arms (22), and the contact points (221) on the two elastic arms (22) are arranged in a front-rear spacing.

4. The sunken board-to-board connector according to claim 1, wherein: An insulating baffle (4) is installed at the rear end of the base (1), a fixed socket (18) is provided at the rear end of the base (1), and a fixed socket (41) is provided on the insulating baffle (4) and is tightly fitted with the fixed socket (18).

5. The sunken board-to-board connector according to claim 4, characterized in that: An extension portion (42) extending backward is provided at the upper edge of the insulating baffle (4), a bayonet (43) for the pin (21) to pass through is provided at the upper portion of the extension portion (42), and a rear end of the pin (21) extends beyond the rear end of the extension portion (42) and bends downward to form a welding foot (24).

6. A backlight module, comprising a light bar (5) and a power adapter plate (6), wherein the power adapter plate (6) is provided with a protruding gold finger plug (61) on the side, and the end edge of the light bar (5) is provided with a mounting groove (51), and a sunken board-to-board connector is fixed in the mounting groove (51), characterized in that: The submerged board-to-board connector adopts the submerged board-to-board connector described in any one of claims 1 to 5, the pin (21) is welded to the conductive welding position (52) on the light bar board (5), the gold finger insert (61) is inserted into the gold finger socket (11) and the conductive layer thereon is in contact with the contact (221).

7. The backlight module according to claim 6, wherein: A clearance groove (53) for accommodating the positioning block (12) is formed at the inner notch of the installation groove (51), and a stop step (54) is formed at the inner end of the clearance groove (53) for contacting the rear end of the positioning block (12).

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