JP7568526B2 - PCB Connectors - Google Patents

Description

The present invention relates to a connector for a circuit board.

A board connector that is surface-mounted on a circuit board (hereinafter also referred to as "board") is known (see, for example, Patent Document 1). As shown in FIG. 6, this board connector 501 has a fixing portion 508 (fixing metal fitting) for fixing a synthetic resin housing 503 to a board 505. The fixing portion 508 is made of a metal plate, and after the main body portion 506 is attached to the housing 503, the soldering portion 507 is fixed to the board 505 by soldering. A plurality of terminal metal fittings 509 are attached to the housing 503.

As shown in FIG. 7, the housing 503 is formed with a hood portion 511 that protrudes forward (in the opposite direction to the Y-axis direction) and a pair of protective walls 513 that protrude rearward (in the Y-axis direction) to protect the terminal fittings 509 (see FIG. 6) exposed from the rear surface. The housing 503 is also provided with a mounting groove 515 into which the fixing portion 508 is mounted. The mounting groove 515 consists of a main body portion accommodating groove 516 into which both side edges of the main body portion 506 can be inserted, and a soldering portion accommodating groove 517 into which the soldering portion 507 can be inserted.

The board connector 501 is subjected to a reflow process while placed on the board 505. That is, solder paste (not shown) is applied in advance to the fixing pads provided on the board 505, and the reflow process is performed with the soldering portion 507 of the fixing portion 508 placed on the solder paste. Then, the solder paste melts and solidifies, thereby fixing (joining) the soldering portion 507 and the fixing pads via the solder.

JP 2006-324189 A

However, in the conventional board connector 501, as shown in FIG. 8, a fillet 520 of solder is formed on the periphery of the soldering portion 507 in the fixing portion 508 by reflow processing. In this board connector 501, when mounted on the board 505, the soldering portion 507 of the fixing portion 508 is disposed adjacent to the mounting groove 515 recessed between the hood portion 511 and the protective wall 513 on three sides. Therefore, when the fixing portion 508 is imaged from above the board 505 in the vertical direction (opposite to the Z-axis direction), the front and rear sides of the fixing portion 508 in the connector fitting direction (direction along the Y-axis) of the fillet 520 formed on the periphery of the fixing portion 508 are hidden by the hood portion 511 and the protective wall 513. Therefore, when an image inspection is performed to inspect the solder joint state of the board connector 501 mounted on the board, the portion J obstructed by the hood portion 511 and the protective wall 513 cannot be inspected. As a result, with the conventional board connector 501, image inspection sometimes made it impossible to guarantee the reliability of the fixing (bonding) strength of the fixing part 508 to the board 505.

The present invention was made in consideration of the above situation, and its purpose is to provide a board connector that ensures visibility when performing image inspection of the mounting area.

The above object of the present invention can be achieved by the following configuration.
(1) A connector comprising a housing made of insulating resin that receives terminals and is fixed to a board, and a pair of fixing metal fittings that are respectively fixed to a pair of parallel side surfaces of the housing perpendicular to the board and fix the housing to the board, the fixing metal fittings comprising a main plate portion having a pair of locking portions formed on both sides and fixed to the side surfaces at a distance in the connector fitting direction, a connecting plate portion that is connected to a lower end of the main plate portion facing the board and extends toward the board in parallel to the side surfaces and has a flared bottom, and a connecting plate portion that is bent from the lower end of the connecting plate portion toward the side surfaces and is connected to the board. and a fixed plate portion having a surface facing the board that is parallel to the board, wherein the outer ends of the pair of locking portions in the connector fitting direction extend parallel to each other in an up-down direction perpendicular to the board, and the outer ends of the fixed plate portion in the connector fitting direction extend parallel to each other in a width direction perpendicular to the up-down direction and to the connector fitting direction, wherein when the distance between the outer ends of the pair of locking portions in the connector fitting direction is A and the distance between the outer ends of the fixed plate portion in the connector fitting direction is B, the relationship A<B is satisfied.

According to the circuit board connector having the above configuration (1), the housing is fixed to the circuit board by a pair of fixing metal fittings. The fixing metal fittings have an upper body plate portion provided with a pair of locking portions that is narrow in the connector fitting direction, and a lower portion provided with a fixing plate portion that is wide in the connector fitting direction. In other words, the fixing metal fittings have a trapezoidal shape in a side view.
In the board connector of this configuration, the distance B between the outer ends of the fixing plate portion formed at the bottom of the fixing bracket in the connector mating direction is larger than the distance A between the outer ends of the pair of locking portions of the main plate portion formed at the top of the fixing bracket in the connector mating direction (A<B). Therefore, even when the fixing bracket is imaged from above in the vertical direction to the board, both ends of the fixing plate portion in the connector mating direction largely extend beyond the contours of the pair of locking portions, particularly in the connector mating direction, and the fillets on the periphery of the fixing plate portion are easily visible. Therefore, in the board connector of this configuration, the entire fillet formed on the periphery of the fixing plate portion (front and rear sides and widthwise outer sides of the connector) can be confirmed, and the reliability of the fixing (joint) strength with the board can be easily guaranteed by inspection.

(2) A connector for a circuit board as described in (1) above, wherein the housing has a pair of clamping ribs protruding from the side surface at a distance from each other in the connector mating direction, the pair of engagement portions are held between the pair of clamping ribs, the outer ends of the pair of clamping ribs in the connector mating direction extend in the vertical direction and parallel to each other, and when the distance between the outer ends of the pair of clamping ribs in the connector mating direction is C, the relationship A<C<B is satisfied.

According to the board connector of the above configuration (2), the distance between the outer ends of the pair of clamping ribs in the connector mating direction is C. The distance C between the outer ends of the pair of clamping ribs is greater than the distance A between the outer ends of the pair of locking parts in the connector mating direction, and is smaller than the distance B between the outer ends of the fixing plate part in the connector mating direction (i.e., A<C<B). As a result, even when the fixing metal fitting is imaged from above in a direction perpendicular to the board, both ends of the fixing plate part in the connector mating direction protrude from the contours of the pair of clamping ribs, particularly in the connector mating direction, and the fillet on the periphery of the fixing plate part is visible. Therefore, in the board connector of this configuration, even if the outer ends of the pair of locking parts in the connector mating direction are sandwiched by the pair of clamping ribs, the entire fillet formed on the periphery of the fixing plate part (front and rear sides and widthwise outer side of the connector) can be confirmed, and the reliability of the fixing (joint) strength with the board can be easily guaranteed by inspection.

(3) A board connector as described in (1) or (2) above, in which the connection plate has a hanging part connected to the lower end of the main plate and hanging down parallel to the side surface, and a protruding part connected to the hanging end of the hanging part and protruding away from the side surface, and the fixing plate is bent from the lower end of the protruding part towards the side surface so as to be parallel to the board.

According to the board connector of the configuration (3) above, the protruding portion of the connection plate of the fixing bracket is positioned farther away from the side of the housing than the main plate. When the protruding portion of the connection plate protrudes from the side of the housing, the lower end of the connection plate is bent at a right angle toward the side to form the fixing plate. In the board connector of this configuration, the fillet can be formed further outward in the width direction of the connector (the direction along the X-axis perpendicular to the pair of side surfaces of the housing). In addition, in the board connector of this configuration, the protruding portion of the connection plate is positioned farther away from the side surface of the housing, so that the fillet formed on a portion of the periphery of the fixing plate facing the side surface of the housing can be visually confirmed by imaging or visual inspection through the gap between the protruding portion of the fixing bracket and the side surface of the housing.

The circuit board connector of the present invention ensures visibility when performing image inspection of the mounting area.

The present invention has been briefly described above. The details of the present invention will become clearer by reading the following description of the embodiment of the invention (hereinafter referred to as "embodiment") with reference to the attached drawings.

1 is a perspective view of a state in which a board connector according to an embodiment of the present invention is fixed to a board. FIG. 2 is an enlarged view of a main portion of the housing shown in FIG. 1 . 2 is a perspective view of the fixing metal fitting shown in FIG. 1 as viewed from the housing side. FIG. 2 is a side view of FIG. 1 . FIG. 2 is a plan view of FIG. 1 . FIG. 13 is a plan view of a conventional board connector fixed to a board. 7 is a side view of the board connector shown in FIG. 6. FIG. 7 is an enlarged view of a main portion of FIG. 6 .

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a perspective view of a board connector 11 according to an embodiment of the present invention fixed to a board 13. Fig. 2 is an enlarged view of a main part of a housing 15 shown in Fig. 1. In the specification, the X, Y and Z directions correspond to the directions of the arrows in the figure. The X axis indicates the left-right (width) direction, the Y axis indicates the front-rear (connector fitting) direction, and the Z axis indicates the up-down direction.
1, the board connector 11 according to this embodiment mainly comprises a housing 15 and a fixing bracket 17. The fixing bracket 17 further comprises a main body plate portion 21 on which a locking portion 19 is formed, a connection plate portion 22, and a fixing plate portion 25.

The housing 15 accommodates the terminals 27 and is fixed to the substrate 13. The housing 15 is formed in a rectangular parallelepiped shape from an electrically insulating synthetic resin (insulating resin). One end face of the housing 15 in the longitudinal (connector mating) direction has a coupling opening 29 into which a mating connector (not shown) is mated. On both the left and right side faces 31 of the housing 15 that sandwich the coupling opening 29, a locking portion 33 for locking the fixing bracket 17 is formed.

As shown in FIG. 2, the engaged portion 33 has a protrusion 41 extending in a direction perpendicular to the substrate 13, a pair of vertical grooves 39 formed on either side of the protrusion 41 and recessed below the side surface 31, and a pair of clamping ribs 35 spaced apart in the connector mating direction of the housing 15 and protruding from the side surface 31.

The protruding strip 41 has a T-shaped cross section in which the legs 43 protrude from the side surface 31 in a plan view and both wings form the pressing plate portion 45 extending in the connector fitting direction. The pair of clamping ribs 35 extend in the vertical direction and are parallel to each other. The outer surfaces of the pair of clamping ribs 35 and the pressing plate portion 45 protrude from the side surface 31 of the housing 15 at the same distance (flush).
The ridges 41 , the vertical grooves 39 and the clamping ribs 35 define insertion spaces 49 that are L-shaped in plan view on the left and right side surfaces 31 of the housing 15 .

A pair of insertion grooves 47 extending vertically are formed between both ends of the pressing plate portion 45 in the connector mating direction and the pair of clamping ribs 35. The lower portion of the insertion groove 47 is closed by the bottom wall portion 51. The locking portion 19 of the fixing bracket 17 is inserted from above into the insertion space 49. The fixing bracket 17 inserted into the insertion space 49 abuts against the bottom wall portion 51 and stops being inserted.

The housing 15 has a pair of clamping ribs 35, and a bulging protruding ridge 53 protruding from the side surface 31 is formed adjacent to the clamping rib 35 on the coupling opening 29 side. A visual gap 55 is provided between the clamping rib 35 on the coupling opening 29 side and this clamping rib 35.

FIG. 3 is a perspective view of the fixing metal fitting 17 shown in FIG.
The fixing brackets 17 are fixed to a pair of side surfaces 31 of the housing 15, respectively, and fix the housing 15 to the board 13. The fixing bracket 17 forms a main body plate portion 21 that is rectangular in side view with its upper portion longer in the connector fitting direction. The vertical sides of the main body plate portion 21 on both longitudinal sides are bent at right angles toward the housing 15, and then bent further toward each other so as to be parallel to the side surfaces 31. As a result, the main body plate portion 21 is bent on both longitudinal sides into a U-shape, forming a roughly C-shape in plan view as a whole.

On both sides of the main body plate 21, a pair of locking portions 19 are formed at the tips of the bent portions 57, each of which is bent into a U-shape, and are spaced apart in the connector fitting direction (direction along the Y axis). The bent portions 57 are formed with a distance W in the direction along the X axis. The pair of locking portions 19 are locking arms having locking claws 63 consisting of an inclined surface 59 that approaches each other as it goes upward, and a locking surface 61 that goes from the upper end of the inclined surface 59 toward the bent portion 57 along the connector fitting direction. The pair of locking portions 19 are locked to locking projections (not shown) provided on both sides of the leg portion 43 of the ridge 41, preventing the main body plate 21 from coming off upward, thereby fixing the fixing bracket 17 to the locking portion 33.

A connecting plate 22 formed by a hanging portion 23 and an overhanging portion 26 is connected to the lower end of the main body plate 21 facing the substrate 13. The hanging portion 23 connected to the lower end of the main body plate 21 hangs down parallel to the side surface 31 of the housing 15. The overhanging portion 26, which overhangs in a direction away from the side surface 31, is connected to the hanging end of the hanging portion 23. This connecting plate 22 is formed so that it flares out (is trapezoidal) when viewed from the side.

The fixing plate portion 25 is formed by bending at a right angle from the lower end of the protruding portion 26 toward the side surface 31. The fixing plate portion 25 is parallel to the substrate 13, and the lower surface facing the substrate 13 becomes a substrate fixing surface 28.
The fixing plate 25 is bent at a right angle from the lower end of the protruding portion 26 toward the side surface 31 so as to be parallel to the substrate 13. The fixing plate 25 is formed with a distance W1 in the direction along the X-axis. Therefore, the fixing metal fitting 17 is arranged such that the main plate 21 and the connecting plate 22 are spaced apart from the side surface 31 and parallel to it, and the fixing plate 25 is bent at a right angle from the lower end of the connecting plate 22 toward the side surface 31. The surface of the fixing plate 25 facing the substrate 13 becomes the substrate fixing surface 28. The substrate fixing surface 28 and the periphery of the fixing plate 25 are fixed (joined) to a fixing pad (not shown) or a foot pattern (not shown) of the substrate 13 by a solder fillet 65 (see FIG. 4).

When the pair of locking portions 19 of the fixing bracket 17 are inserted from above into the insertion space 49, the locking claws 63 are locked to the locking projections (not shown) of the legs 43, preventing the fixing bracket 17 from slipping out upward and fixing the fixing bracket 17 to the locking portions 33. The fixing bracket 17 fixed to the side surface 31 has the fixing plate portion 25 protruding from the housing 15 by a distance W1.

In this embodiment of the circuit board connector 11, when the distance between the outer ends of a pair of locking portions 19 in the connector fitting direction (direction along the Y axis) is A, and the distance between the outer ends of the fixing plate portions 25 in the connector fitting direction (direction along the Y axis) is B, the fixing brackets 17 are formed so that the relationship A<B is satisfied.

FIG. 4 is a side view of FIG.
Furthermore, in the board connector 11, a pair of clamping ribs 35 protrude from the side surface 31 of the housing 15 while being spaced apart in the connector fitting direction. A pair of locking portions 19 are held between the pair of clamping ribs 35. Here, when the distance between the outer ends of the pair of clamping ribs 35 in the connector fitting direction (direction along the Y axis) is C, the housing 15 and the fixing metal fitting 17 are formed so as to satisfy the relationship A<C<B.

Next, the operation of the above-mentioned configuration will be described.
In the board connector 11 according to this embodiment, the housing 15 is fixed to the board 13 by a pair of fixing brackets 17. The fixing brackets 17 are respectively fixed to both side surfaces 31 of the housing 15. The side surfaces 31 of the housing 15 are surfaces that include a direction perpendicular to the board 13 (direction along the Z-axis) and a connector fitting direction (direction along the Y-axis).

The fixing metal fitting 17 has at its upper portion a pair of locking portions 19. The pair of locking portions 19 are spaced apart in the connector fitting direction.
The fixing bracket 17 has a connecting plate 22 that flares out at the bottom connected to the lower end of a main plate 21 that is provided with a pair of locking portions 19. A fixing plate 25 that is bent at a right angle toward the side surface 31 of the housing 15 and is parallel to the board 13 is connected to the lower end of the connecting plate 22.

Therefore, in the fixing bracket 17 of this embodiment, the upper body plate portion 21 where the pair of locking portions 19 are provided is narrow in the connector fitting direction, and the lower portion where the fixing plate portion 25 is provided is wide in the connector fitting direction. That is, the fixing bracket 17 of this embodiment has a substantially trapezoidal shape in a side view.
When the distance between the outer ends of the pair of locking portions 19 in the connector fitting direction is A and the distance between the outer ends of the fixing plate portions 25 in the connector fitting direction is B, the fixing metal fitting 17 satisfies the relationship A<B.

In order to improve the reliability of the strength of the board connector 11 fixed to the board 13, the condition of the soldered parts is inspected by an inspection camera. The image inspection direction (imaging direction) of the inspection camera is from above the board 13 (opposite the Z-axis direction), where the fillet 65 (see Figures 4 and 5) formed on the periphery of the fixing plate part 25 can be most easily confirmed.

Therefore, in the board connector 11 of this embodiment, the distance B between the outer ends of the fixing plate portion 25 formed on the lower part of the fixing bracket 17 in the connector mating direction as shown in FIG. 4 is greater than the distance A between the outer ends of the pair of locking portions 19 in the main plate portion 21 formed on the upper part of the fixing bracket 17 in the connector mating direction (A<B). Therefore, even when the fixing bracket 17 is imaged from above in the vertical direction relative to the board 13, both ends of the fixing plate portion 25 in the connector mating direction significantly extend beyond the contours of the pair of locking portions 19, making it easier to see the fillets 65 on the periphery of the fixing plate portion.

FIG. 5 is a plan view of FIG.
Furthermore, the locked portion 33 (particularly the clamping rib 35) is located inside the distance D between the outer faces of the pair of fixing metal fittings 17. This also makes it easier to see the fillets 65 formed on both ends of the fixing plate portion 25 in the connector width direction (the direction along the X-axis).

For this reason, in the circuit board connector 11 of this embodiment, the fillet 65 formed on the periphery of the fixing plate portion 25 can be checked in its entirety (on the front and rear sides and on the outer width side of the connector), making it easier to ensure the reliability of the fixing (joint) strength with the circuit board 13 through inspection.

In addition, in the circuit board connector 11 of this embodiment, the pair of locking portions 19 are held between a pair of clamping ribs 35 that protrude from the side surface 31. The pair of clamping ribs 35 are spaced apart in the connector mating direction, and hold the pair of locking portions 19 in the space between them.

Here, the distance between the outer ends of the pair of clamping ribs 35 in the connector mating direction is C. The distance C between the outer ends of the pair of clamping ribs 35 is greater than the distance A between the outer ends of the pair of locking portions 19 in the connector mating direction, and is smaller than the distance B between the outer ends of the fixing plate portions 25 in the connector mating direction (i.e., A<C<B).

As a result, when the fixing bracket 17 is imaged from above in a direction perpendicular to the substrate 13, particularly in the connector mating direction, both ends of the fixing plate portion 25 in the connector mating direction extend beyond the contours of the pair of clamping ribs 35, and the fillet 65 on the periphery of the fixing plate portion can be seen.

For this reason, in the circuit board connector 11 of this embodiment, even though the outer ends of the pair of locking portions 19 in the connector mating are clamped by a pair of clamping ribs 35, the entire fillet 65 formed on the periphery of the fixing plate portion 25 (front and rear sides and widthwise outer side of the connector) can be confirmed, making it easier to guarantee the reliability of the fixing (joint) strength with the circuit board 13 through inspection.

In addition, in the board connector 11 of this embodiment, the connecting plate portion 22 of the fixing bracket 17 has a hanging portion 23 connected to the lower end of the main plate portion 21 and hanging down parallel to the side surface 31, and a protruding portion 26 connected to the hanging end of the hanging portion 23 and protruding in a direction away from the side surface 31, and the fixing plate portion 25 is bent at a right angle from the lower end of the protruding portion 26 toward the side surface 31 so as to be parallel to the board 13.
As a result, the protruding portion 26 of the connecting plate portion 22 of the fixing bracket 17 is positioned farther away from the side surface 31 of the housing 15 than the main plate portion 21. In other words, the fixing bracket 17 is fixed to the side surface 31 by a pair of locking portions 19 in a state in which the protruding portion 26 of the connecting plate portion 22 protrudes outward beyond the side surface 31 of the housing 15. The fixing bracket 17 in a state in which the protruding portion 26 of the connecting plate portion 22 protrudes beyond the side surface 31 of the housing 15 becomes a fixing plate portion 25 in which the lower end of the connecting plate portion 22 is bent at a right angle toward the side surface 31.

In the board connector 11 of this embodiment, the fillet 65 can be formed further outward in the connector width direction (the direction along the X-axis perpendicular to the pair of side surfaces 31 of the housing 15).
Furthermore, in the board connector 11 of this embodiment, the protrusion 26 of the connection plate portion 22 is positioned away from the side surface 31 of the housing 15, so that the fillet 65 molded into a portion of the periphery of the fixing plate portion 25 facing the side surface 31 of the housing 15 can also be seen through the viewing gap 55 corresponding to the gap between the side surface 31 and the connection plate portion 22, either by visual inspection or by imaging with an inspection camera.

Therefore, the board connector 11 according to this embodiment ensures visibility when performing image inspection of the mounting area.

The present invention is not limited to the above-described embodiment, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary as long as they can achieve the present invention, and are not limited.

Here, the features of the embodiments of the board connector according to the present invention described above will be briefly summarized and listed in the following [1] to [3].
[1] A housing (15) made of insulating resin that accommodates a terminal (27) and is fixed to a substrate (13);
A pair of fixing metal fittings (17) are respectively fixed to a pair of parallel side surfaces (31) of the housing perpendicular to the substrate, and fix the housing to the substrate;
Equipped with
The fixing bracket is
a main body plate portion (21) having a pair of locking portions (19) formed on both sides thereof and fixed to the side surfaces while being spaced apart in the connector fitting direction;
a connecting plate portion (22) that is connected to a lower end portion of the main plate portion facing the substrate and that extends toward the substrate in parallel with the side surface and has a flared bottom;
a fixing plate portion (25) that is bent from a lower end of the connection plate portion toward the side surface so as to be parallel to the substrate, and the surface facing the substrate serves as a substrate fixing surface (28),
The distance between the outer ends of the pair of locking portions in the connector fitting direction is A,
When the distance between the outer ends of the fixing plate portions in the connector fitting direction is B,
A board connector (11) that satisfies the relationship A<B.
[2] The housing (15)
A pair of clamping ribs (35) protruding from the side surface (31) and spaced apart in the connector fitting direction,
The pair of locking portions (19) are held between the pair of clamping ribs,
When the distance between the outer ends of the pair of clamping ribs in the connector fitting direction is C,
The connector (11) for a circuit board according to the above [1], which satisfies the relationship A<C<B.
[3] The connecting plate portion (22) has a hanging portion (23) connected to a lower end of the main body plate portion (21) and hanging down parallel to the side surface (31), and a protruding portion (26) connected to the hanging end of the hanging portion and protruding in a direction away from the side surface,
The board connector (11) according to the above [1] or [2], wherein the fixing plate portion (25) is bent from the lower end of the protruding portion toward the side surface so as to be parallel to the board (13).

11... Board connector 13... Board 15... Housing 17... Fixing metal fitting 19... Locking portion 21... Main body plate portion 22... Connection plate portion 23... Hanging portion 25... Fixing plate portion 26... Extension portion 27... Terminal 28... Board fixing surface 31... Side surface 35... Clamping rib

Claims (3)

a housing made of insulating resin that houses the terminals and is fixed to the board;
a pair of fastening fittings fixed to a pair of parallel side surfaces of the housing perpendicular to the substrate, the pair of fastening fittings fastening the housing to the substrate;
Equipped with
The fixing bracket is
a main body plate portion having a pair of locking portions formed on both sides thereof and fixed to the side surface while being spaced apart in the connector fitting direction;
a connecting plate portion that is connected to a lower end of the main plate portion facing the substrate and that extends toward the substrate in parallel with the side surface and has a flared bottom;
a fixing plate portion that is bent from a lower end of the connection plate portion toward the side surface so as to be parallel to the board, and a surface facing the board serves as a board fixing surface;
The outer ends of the pair of locking portions in the connector fitting direction extend parallel to each other in a vertical direction perpendicular to the board,
The outer ends of the fixing plate portions in the connector fitting direction extend parallel to each other in the vertical direction and in a width direction perpendicular to the connector fitting direction,
The distance between the outer ends of the pair of locking portions in the connector fitting direction is A,
When the distance between the outer ends of the fixing plate portions in the connector fitting direction is B,
A board connector that satisfies the relationship A<B. The housing includes:
a pair of clamping ribs protruding from the side surface and spaced apart in the connector fitting direction;
The pair of engaging portions is held between the pair of clamping ribs,
The outer ends of the pair of clamping ribs in the connector fitting direction extend in the vertical direction and are parallel to each other,
When the distance between the outer ends of the pair of clamping ribs in the connector fitting direction is C,
2. The board connector according to claim 1, wherein the relationship A<C<B is satisfied. the connecting plate portion has a hanging portion connected to a lower end of the main body plate portion and hanging down parallel to the side surface, and a protruding portion connected to the hanging end of the hanging portion and protruding in a direction away from the side surface,
3. The board connector according to claim 1, wherein the fixing plate portion is bent from a lower end of the protruding portion toward the side surface so as to be parallel to the board.

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