CN201994443U - Plug and led lamp - Google Patents

Abstract

The utility model provides a plug and an LED lamp. It includes a shell, a circuit board, a light-emitting LED is welded on the circuit board, a socket is formed at one end of the circuit board, and a plug is connected to the other end of the circuit board. It is characterized in that the plug includes an insulating body and a metal body, wherein the insulating body is set There are a first groove and a second groove, the metal body includes the first metal body and the second metal body, the first metal body is stuck in the first groove and forms an electrical connection with the socket, and the second metal body is stuck in the second metal body In the groove and form an electrical connection with the socket. The LED lamp of the utility model has the advantages of compact design, simple structure, simple production process and low cost. It is easy to disassemble and assemble, and can be completed by ordinary people without other tools.

Description

Plug and LED light

technical field

The utility model relates to a plug and an LED lamp, in particular to a bar-shaped LED lamp which can be conveniently combined into a lamp strip of any length.

Background technique

Due to the advantages of high light efficiency, low energy consumption and long life, LEDs have been widely used in various decorative occasions and advertising industries, such as window displays, showcases, indoor scenery and so on. Because of the special requirements of the decoration industry or decoration occasions, generally speaking, it is hoped that the lamps used are beautiful in appearance, or even small and delicate, and lamps with LEDs as light sources can fully meet such requirements.

Based on the pursuit of the above goals, a new type of product has been developed on the basis of the traditional cord light. The traditional flexible wire lamp is a kind of bendable LED decorative lamp made of SMD LED wrapped in transparent or translucent soft plastic resin, while the newly developed product is in a long strip shell A strip-shaped circuit board is inserted, and the light-emitting element LED is welded on the circuit board, such as the "bending semiconductor light-emitting diode decorative lamp" disclosed in Chinese patent ZL02250827.9, which is provided with lead connectors , the dotted line next to the lead connector can be broken at will, and the power cord is inserted into the lead connector on the broken plate at the break, and the light bar can also work normally.

There is no difference between the above-mentioned lead wire connector structure and the similar structure of traditional cord lamps, and there are also shortcomings in use: first, it is not very convenient to use, and the lamp body should be broken as needed during use, but for those who For ordinary people who understand electrical appliances, it is impossible to complete it by themselves; second, the distance between the lead connectors is generally about 1 meter, and even if the lamp body can be broken, its length is still difficult to meet the requirements of various environmental conditions; 3. At each break, an additional power socket is required to supply power for the power cord, which seriously affects the overall effect of the decorative occasion. Fourth, additional lead wires are required at each plug or socket to connect the relevant parts of the plug terminal or socket, which is cumbersome and expensive to manufacture. It is also because the structure of the entire lamp body at the plug or socket is different, so It lacks consistency as a whole and can easily lead to differences in the spacing between LEDs near this location, thereby affecting decoration or lighting effects.

Utility model content

The utility model provides a plug and an LED lamp. The design is compact, and has the advantages of simple structure, simple production process and low cost.

The plug includes an insulating body and a metal body, and is characterized in that: the insulating body is provided with a first groove and a second groove, a first side wall is formed between the first groove and the second groove, and the first groove The other side is the second side wall, the other side of the second groove is the third side wall, the upper surface of the first side wall has a first concave structure at the position adjacent to the first groove, and the upper surface of the first side wall is on the The position adjacent to the second groove has a second concave structure; the metal body includes a first metal body and a second metal body, the first metal body includes a first body and a first bending part, and the first body is stuck in the first groove In, wherein, one end of the first main body protrudes from the edge of the first groove, and forms an electrical connection with a strip of metal foil provided on the other end of the circuit board, and the other end of the first main body is connected with the first bending part, and the first The bent part protrudes from the first groove and forms an electrical connection with the socket; the second metal body includes a second main body and a second bent part, and the second main body is stuck in the second groove, wherein one end of the second main body protrude from the edge of the second groove, and form an electrical connection with another metal foil provided on the other end of the circuit board, the other end of the second body is connected to the second bending part, and the second bending part protrudes from the groove and form an electrical connection with the socket.

Preferably, the first body includes a first component part, a second component part and a third component part connected in sequence, and the width of the third component part at the connection position with the first bending part is larger than that of the first component part and the second component part The width of the second main body includes the fourth component, the fifth component and the sixth component connected in sequence, and the width of the sixth component at the connection position with the second bending part is greater than that of the fourth component and the fifth component width.

Preferably, the second component part and the fifth component part are inclined surface structures with an inclined angle.

Preferably, the upper surface of the second side wall has a third concave structure corresponding to the first concave structure, and the upper surface of the third side wall has a fourth concave structure corresponding to the second concave structure.

Preferably, the first bent portion and the second bent portion are elastic contact terminals.

Preferably, the bending angles of the first bending part and the second bending part are less than 90 degrees.

Preferably, the structure clamping the first component in the first groove is a first solid structure, a first positioning pin is set on the first solid structure, and the first positioning pin passes through the first positioning pin set on the first component. A positioning pin hole; the structure that clamps the fourth component in the second groove is the second solid structure, the second positioning pin is set on the second solid structure, and the second positioning pin passes through and is arranged on the fourth component The second positioning pin hole.

Preferably, the position where the first component part forms the first positioning pin hole is a first circular structure, the first circular structure has a first inner diameter and a first outer diameter, and the first inner diameter is inserted into the first positioning pin hole. The diameter of the hollow part, the first outer diameter is the diameter of the connecting part with the first component, the first outer diameter is greater than the width of the first component; the position where the second positioning pin hole is formed in the second component is the second circular structure , the second circular structure has a second inner diameter and a second outer diameter, the second inner diameter is the diameter of the hollow part inserted into the second positioning pin hole, the second outer diameter is the diameter of the connecting part with the fourth component, the second The second outer diameter is greater than the width of the fourth component.

The utility model also proposes an LED lamp, including a housing, a circuit board inserted in the housing, a light-emitting LED welded on the circuit board, and a socket formed at one end of the circuit board by at least two electrically connected metal foils arranged on the circuit board. 1. A plug is connected to the other end of the circuit board through at least two electrically connected metal foils arranged on the circuit board, which is characterized in that: it also includes a plug, the plug includes an insulating body and a metal body, and the insulating body is provided with a first groove and the second groove, between the first groove and the second groove is a first side wall, the other side of the first groove is a second side wall, and the other side of the second groove is a third side wall, The upper surface of the first side wall has a first concave structure at a position adjacent to the first groove, and the upper surface of the first side wall has a second concave structure at a position adjacent to the second groove; the metal body includes a first metal body and a metal body. The second metal body, the first metal body includes a first body and a first bending part, the first body is stuck in the first groove, wherein, one end of the first body protrudes from the edge of the first groove, and the circuit A piece of metal foil provided on the other end of the plate forms an electrical connection, the other end of the first body is connected to the first bent part, and the first bent part protrudes from the first groove and forms an electrical connection with the socket; the second metal body Including the second main body and the second bending part, the second main body is stuck in the second groove, wherein, one end of the second main body protrudes from the edge of the second groove, and another metal strip provided on the other end of the circuit board The foil forms an electrical connection, the other end of the second body is connected to the second bent portion, and the second bent portion protrudes from the second groove and forms an electrical connection with the socket.

Preferably, a first slot and a second slot are respectively provided on the inner sides of the two side walls of the casing, the width formed by the first slot and the second slot is greater than or equal to the width of the circuit board, and the width formed is narrower at the upper part and narrower at the lower part. Width.

Compared with the prior art, the utility model has at least one of the following advantages:

The main body of each lamp is designed with a simplified plug and socket structure, so that according to the length of the use occasion, the LED lamp can be flexibly plugged to meet the use requirements, especially when there are more than two kinds of lamps with the same structure but different lengths. In the case of the model LED lamp, the length requirements of the application can be very accurately met through the plug-in combination.

It is easy to disassemble and assemble, and can be completed by ordinary people without other tools.

The LED lamps are connected into a light strip through a plug, and the entire mated light strip only needs one power input socket, which is beneficial to ensure the tidiness of the decoration occasion and additionally reduces the cost of related power input accessories.

The very simplified plug and socket design of the LED light makes the appearance of the entire LED light completely unaffected by the structure of the plugs and sockets at both ends, and can be made very beautiful and compact.

The plug does not need additional wiring, etc., nor additional accessories, and has the advantages of simple structure, simple production process and low cost.

The space occupied by the plug and the socket is very small, so the continuity of the decorative effect is good, and the overall effect of the lamp will not be affected.

Description of drawings

Fig. 1 is the three-dimensional assembly exploded view of LED lamp of the present invention;

Fig. 2 is a partial enlarged view of the metal body in the utility model plug;

Fig. 3 is a partially enlarged view of the insulating body in the plug of the present invention;

Fig. 4 is the enlarged structural diagram of the plug and the socket after the assembly of the utility model;

Fig. 5 is the enlarged structural diagram of the plug and the socket after the assembly of the utility model;

Fig. 6 is an overall structural diagram of the utility model after assembly.

Detailed ways

As shown in FIG. 1 , it is a three-dimensional assembly and exploded view of a preferred embodiment of the LED lamp of the present invention. The strip-shaped LED lamp includes a strip-shaped shell 1, a circuit board 2 inserted into the shell, a light-emitting LED is welded on the circuit board, and at least two electrically connected metal foils are arranged on the circuit board at one end of the circuit board. A socket 3 is formed, and a plug is connected to the other end of the circuit board through at least two electrically connected metal foils arranged on the circuit board.

The socket 3 is formed by one end of the circuit board 2. On the circuit board 2, there are at least two parallel electrically connected metal foils printed by the printed circuit board manufacturing process. The metal foils are electrically connected to the plug. If the LED lamp To emit colored light, connect the red R, green G, blue B and the power cord respectively.

The plug includes an insulating body 41 and a metal body 42. The insulating body 41 is provided with at least a first groove 414 and a second groove 415 (marked in FIG. 3 ), as shown in FIG. 2 ; the metal body 42 has at least a first metal body and the second metal body, the first metal body includes a connected first body and a first bending portion 424, the first body is stuck in the first groove 414, wherein one end of the first body protrudes from the first groove The edge of the first main body is electrically connected to a piece of metal foil provided on the other end of the circuit board, and the other end of the first body is connected to the first bent part, and the first bent part protrudes from the first groove 414 and forms an electrical connection with the socket. Connection; the second metal body includes a connected second main body and a second bending portion 428, the second main body is stuck in the second groove 415, wherein, one end of the second main body protrudes from the edge of the second groove, and Another metal foil provided on the other end of the circuit board forms an electrical connection, and the other end of the second body is connected to the second bent portion, and the second bent portion protrudes from the second groove 415 to form an electrical connection with the socket. Among them, in the way of connecting the metal body and the circuit board, taking the first metal body as an example, when the direction of the first metal body is facing downwards, the insulating body is above the first metal body, and at this time, the electrically connected metal foil on the circuit board direction up. On the contrary, when the direction of the first metal body is upward, the insulation body is below the first metal body, and at this time, the direction of the electrical connection metal foil on the circuit board is downward. Wherein, the metal body can be stuck in the groove in the following ways. For example, a hook structure is provided on the side wall or bottom of the first groove, and the free end of the first bending part is hooked to hook the first metal body stuck.

Preferably, the first bent portion and the second bent portion are elastic contact terminals. This creates a tighter connection when mated. Of course, it may not be the elastic contact terminal. Preferably, the bending angle of the first bending part and the second bending part is less than 90 degrees. The advantage of this is that when the plug is inserted into the socket and is subjected to external downward pressure, a certain reaction force can be formed to prevent the two LED lights from being disconnected at the connection, ensuring the tightness and safety of the connection sex.

The structure of the metal body will be described below in conjunction with the partial enlarged view of the preferred embodiment of the metal body in FIG. 2 . The metal body is similar to a fishhook shape or a shape in which the upper cross part is removed.

The first metal body includes a connected first body and a first bent portion 424 , and the second metal body includes a connected second body and a second bent portion 428 . The first body may include a first component part 421, a second component part 422 and a third component part 423 connected in sequence, the third component part 423 is connected to the first bending part 424, and the second body may include a fourth component part connected in sequence. The component part 425 , the fifth component part 426 and the sixth component part 427 , the sixth component part 427 is connected with the second bending part 428 .

Preferably, the width of the third component part at the connection position with the first bending part is greater than the widths of the first component part and the second component part, and the width of the sixth component part at the connection position with the second bending part is greater than that of the fourth component part The width of the part and the fifth component, the advantage of this is that not only can the connection be more reliable at the connection, but also, after being inserted into the first groove and the second groove respectively, the wider The setting plays a better clamping effect.

Preferably, the first component part 421, the third component part 423, the fourth component part 425 and the sixth component part 427 are planar structures or substantially planar structures, and the second component part 422 and the fifth component part 426 are inclined Angled sloped surface structure. The inclination angle is greater than 90 degrees, and the first metal body is taken as an example for illustration, and the structure of the second metal body is the same as that of the first metal body. The angle between the first component part 421 and the second component part 422 is greater than 90 degrees, and the angle between the second component part 422 and the third component part 423 is greater than 90 degrees. The first component part 421 and the second component part 422 are connected together to form a ladder-like structure. The ladder shape may have multiple steps, and the multiple steps may not be continuously rising, as long as It is sufficient to form an inclination angle as a whole. Preferably, the first groove is provided with a first inclination angle consistent with the second component, and the second groove is provided with a second inclination angle consistent with the fourth component. Preferably, the first inclination angle is consistent with the second inclination angle.

The following will describe in detail how the insulating body is provided with the first groove and the second groove. The structure of the first groove and the second groove can be the same, and the first groove is taken as an example below for illustration.

Between the first groove 414 and the second groove 415 is the first side wall 501, the other side of the first groove 414 is the second side wall 502, and the other side of the second groove 415 is the third side wall 503 , the upper surface of the first side wall has a first recessed structure 504 at a position adjacent to the first groove, and the upper surface of the first side wall has a second recessed structure (not shown in the figure) at a position adjacent to the second groove . That is to say, the height of the position corresponding to the wider part of the first metal body in the first side wall is lower than the height of the position corresponding to the first component part and the second component part of the first metal body. Similarly, the first side wall The height of the position corresponding to the wider part of the second metal body is lower than the height of the position corresponding to the fourth component and the fifth component of the second metal body. The height mentioned here can also be regarded as the thickness of the insulating body. A wider structure for placing the first metal body and the second metal body.

Preferably, the upper surface of the second side wall has a third concave structure corresponding to the first concave structure, and the upper surface of the third side wall has a fourth concave structure corresponding to the second concave structure. The purpose is also a wider structure where the first and second metal bodies are placed.

Preferably, the structure clamping the first component in the first groove is a first solid structure, a first positioning pin is set on the first solid structure, and the first positioning pin passes through the first positioning pin set on the first component. A positioning pin hole; the structure that clamps the fourth component in the second groove is the second solid structure, the second positioning pin is set on the second solid structure, and the second positioning pin passes through and is arranged on the fourth component The second positioning pin hole, to achieve positioning pin tight. The structure holding the second component and the third component in the first groove is a transparent structure, so that the first metal body can be clamped through the transparent structure, and the cost can be saved, and better electrical conductivity can also be achieved. Make sufficient electrical contact with the electrical connection metal foil. Preferably, the position where the first component part forms the first positioning pin hole is a first circular structure, the first circular structure has a first inner diameter and a first outer diameter, and the first inner diameter is inserted into the first positioning pin hole. The diameter of the hollow part, the first outer diameter is the diameter of the connecting part with the first component, preferably, the first outer diameter is greater than the width of the first component; the position where the second component forms the second positioning pin hole is the second A circular structure, the second circular structure has a second inner diameter and a second outer diameter, the second inner diameter is the diameter of the hollow part inserted into the second positioning pin hole, and the second outer diameter is the diameter of the connecting part with the fourth component Diameter, the second outer diameter is greater than the width of the fourth component, so that it is not easy to break at the connection between the first circular structure and the first component, and the connection between the second circular structure and the fourth component. Preferably, the structure for clamping the first component in the first groove is set to be consistent with the first circular structure, and the structure for clamping the fourth component in the first groove is set to be consistent with the second circular structure Consistent structure to achieve a more reliable clamping purpose.

Of course, the plug and the other end of the circuit board can also be connected in other ways, for example, fastened connection through a plug-in structure. When connecting through the plug-in structure, the insulating body of the plug can be plugged into the circuit board. A protruding structure is provided on one side of the insulating body facing the circuit board, a recessed structure corresponding to the protruding structure is provided on the circuit board, and the protruding structure is inserted into the recessed structure to realize fastening connection. Since the protruding structure can be integrally formed with the insulating body, it not only ensures a fast connection, but also makes the process implementation relatively simple. Of course, the above-mentioned protruding structure and recessed structure can also be arranged transposed, that is, the recessed structure is provided on the insulating body, and the protruding structure is provided on the circuit board. Of course, those skilled in the art should understand that the other end of the plug and the circuit board can also be fastened in other ways, and corresponding deformations and modifications made on the basis of the above structure should be covered within the scope of protection of the present claims. Inside. Those skilled in the art should also understand that the plug described in the present invention can also be used in other lamp connections or other electrical connections besides LED lamps.

Each LED lamp is designed with a simplified plug and socket structure, wherein the socket is formed by one end of the circuit board, no additional design is required, and the plug is a separate component, which can be flexibly plugged into the LED lamp according to the length of the application. To meet the use requirements, especially when equipped with two or more types of LED lamps with the same structure but different lengths, the length requirements of the use occasion can be very accurately met through the plug-in combination. The entire mated light strip only needs one power input socket, which is beneficial to ensure the tidiness of the decoration occasion and additionally reduces the cost of related power input accessories.

Fig. 4 and Fig. 5 are enlarged structural diagrams of the plug and the socket after assembly of the utility model. Fig. 6 is an overall structural diagram of the utility model after assembly.

It can be seen from FIG. 4 to FIG. 6 that the socket protrudes from the end of the housing 1 , and the protruding part is used for inserting a plug to establish an electrical connection relationship between two LED lamps. Wherein, the length of the end of the socket protruding from the housing 1 can be less than or equal to the length of the plug formed by the LED lamp, that is, the part of the socket protruding from the housing 1 of the LED lamp is completely inserted into the socket 3 of another LED lamp, so that the two LED lamps The lamp forms a plug-in connection, which not only can replace plugs of different lengths and specifications to achieve the purpose of fine-tuning the connection length, but also has a good continuity of the decorative effect and will not affect the overall effect of the lamp. The very simplified plug and socket design of the LED light makes the appearance of the entire LED light completely unaffected by the structure of the plugs and sockets at both ends. Not only the pins are shorter and more beautiful, but also the LED lights are evenly arranged and the circuit connection is safer. Of course, the length of the end of the socket protruding from the shell 1 may also be greater than the length of the socket 3 formed by the LED lamp, and the part of the socket exposed outside the shell 1 is an insulating body 41 . For example, the insulator is directly connected to the exposed part, or an insulating part is directly formed on the socket. The advantage of this is that when the length needs to be fine-tuned, the length formed by the two connected LED lamps can be adjusted as long as the plugs of different lengths are replaced.

Frequent plugging and unplugging may cause the plug to fail. When a fault occurs, only the plug can be replaced without replacing the entire LED light, which is not only convenient for replacement, but also saves costs. The plug of the utility model is not equipped with connecting wires, and does not need other accessories, and the plug will not be unusable due to damage to the connecting wires, so that the plug is safer during use and has a longer service life. The damage of the connecting wire mentioned above is, for example, the connecting wire is broken or the welding is not firm. The plug has a compact design and has the advantages of simple structure, simple production process and low cost. It is easy to disassemble and assemble, and can be completed by ordinary people without other tools.

The housing disclosed in another preferred embodiment of the present invention can be a plastic frame or a metal frame, or a part is a plastic frame and the other part is a metal frame. When a metal frame is used, the heat dissipation effect is better. Preferably, the inner sides of the two side walls of the casing 1 are respectively provided with a first slot and a second slot, and the circuit board 2 is inserted into the first slot and the second slot, and the first slot and the second slot They may not communicate with each other, that is, a gap is formed between the first slot and the second slot. Of course, the first slot and the second slot may also be connected to form a whole. The width formed by the first slot and the second slot is greater than or equal to the width of the circuit board 2 , and the formed width is narrower at the upper part and wider at the lower part. Wherein, the direction of soldering the LED on the circuit board 2 faces upwards, insert the circuit board, set the first slot and the second slot to be narrower at the top and wider at the bottom, closer to the LEDs soldered on the circuit board It is the upper part, so that after the circuit board is inserted into the wide part, the narrow part of the upper part can play a role of clamping, so that the stability of the circuit board can be guaranteed even under severe vibration. Preferably, the inner sides of the two side walls of the casing are also provided with a third slot and a fourth slot for inserting the lens, and the third slot and the fourth slot are located above the first slot and the second slot , that is, the lens is inserted above the circuit board to amplify the light source, and the length of the lens can be the same as the length of the circuit board. For the case where a lens is installed, the casing is not integral, and one part may be a metal casing and the other part may be a plastic casing.

According to the length of the LED lamp to be decorated in the use occasion, the LED lamp of the utility model can be selected to be mated and combined with a suitable number and a suitable length specification, so that regardless of the length to be decorated and whether a corner needs to be turned, it is very convenient to use only a simple The mating method is completed. The connected LED lamp is not only beautiful, but also has no problem of exposure of live parts no matter which socket falls off during use, so it is very safe.

Claims (10)

1. plug, an end form with circuit board and are electrically connected, and the other end is inserted in the socket, are electrically connected with socket formation, comprise insulating body and metallic object, it is characterized in that:

Insulating body is provided with first groove and second groove, between first groove and second groove, be the first side wall, the another side of first groove is second sidewall, the another side of second groove is the 3rd sidewall, the upper surface of the first side wall has first sunk structure in the position in abutting connection with first groove, and the upper surface of the first side wall has second sunk structure in the position in abutting connection with second groove;

Metallic object comprises first metallic object and second metallic object, first metallic object comprises first main body and first kink, first main body is stuck in first groove, wherein, one end of first main body stretches out in the edge of first groove, be electrically connected with the strip metal paper tinsel formation that is provided with on the circuit board other end, the other end of first main body is connected with first kink, and first kink stretches out in first groove and is electrically connected with socket formation; Second metallic object comprises second main body and second kink, second main body is stuck in second groove, wherein, one end of second main body stretches out in the edge of second groove, be electrically connected with another strip metal paper tinsel formation that is provided with on the circuit board other end, the other end of second main body is connected with second kink, and second kink stretches out in second groove and is electrically connected with socket formation.

2. according to the described plug of claim 1, it is characterized in that: first main body comprises first part, second part and the 3rd part that connects successively, the 3rd part with the width of the first kink link position width greater than first part, second part, second main body comprises successively the 4th part, the 5th part and the 6th part that connects, the 6th part with the width of the second kink link position width greater than the 4th part, the 5th part.

3. according to the described plug of claim 2, it is characterized in that: second part and the 5th part are the inclined plane structure with angle of inclination.

4. according to the described plug of claim 1, it is characterized in that: the upper surface of second sidewall has three sunk structure corresponding with first sunk structure, and the upper surface of the 3rd sidewall has four sunk structure corresponding with second sunk structure.

5. according to the described plug of claim 1, it is characterized in that: first kink and second kink are the Elastic Contact terminal.

6. according to the described plug of claim 1, it is characterized in that: the bending angle of first kink and second kink is less than 90 degree.

7. according to the described plug of claim 2, it is characterized in that: the structure of blocking first part in first groove is first entity structure, first alignment pin is set on first entity structure, passes first dowel hole that is arranged on first part by first alignment pin; The structure of blocking the 4th part in second groove is second entity structure, and second alignment pin is set on second entity structure, passes second dowel hole that is arranged on the 4th part by second alignment pin.

8. according to the described plug of claim 7, it is characterized in that: the position that first part forms first dowel hole is first circular configuration, first circular configuration has first interior diameter and first overall diameter, first interior diameter is the diameter of the hollow space of insertion first dowel hole, first overall diameter is and the diameter of the first part coupling part that first overall diameter is greater than the width of first part; The position that second part forms second dowel hole is second circular configuration, second circular configuration has second interior diameter and second overall diameter, second interior diameter is the diameter of the hollow space of insertion second dowel hole, second overall diameter is and the diameter of the 4th part coupling part that second overall diameter is greater than the width of the 4th part.

9.LED lamp, comprise in the enclosure circuit board of shell, plug-in mounting, be welded with on the circuit board emitting led, be electrically connected metal formings and form sockets, be electrically connected metal formings and be connected with plug by being arranged on the circuit board at least two by being arranged on the circuit board at least two at an end of circuit board at the other end of circuit board, it is characterized in that: also comprise arbitrary described plug in the claim 1 to 8.

10. according to the described LED lamp of claim 9, it is characterized in that: the inboard of two sidewalls of shell is provided with first slot and second slot respectively, the width that first slot and second slot form is more than or equal to the width of circuit board, and the width that forms is that the top narrow lower portion is wide.

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