JP2009146738A - Board connector, circuit board with connector, and board storage case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board connector for simplifying fixing work for a circuit board by eliminating the need for fastening components such as machine screws and screws to reduce cost when fixing the circuit board to the connector. <P>SOLUTION: The board connector 10 includes a connector housing 2, terminal fittings 4, 6 having extending portions 4L, 6L extending from one end wall 2c of the connector housing via bent portions to front ends 4s, 6s where the front ends are inserted into the circuit board 30 and soldered, and a fixing means 2h extending from one end wall for fixing the circuit board in engagement with a cutout 32 of the circuit board at a position where the circuit board is soldered to the front ends. The fixing means has a chuck portion 2j which is inserted into the cutout when inserting the front ends into the circuit board in the extending direction of the front ends and which is unfolded when further inserted into the cutout, to prevent the fall-off of the circuit board, and a stopper portion 2k which abuts on the circuit board at a position where the chuck portion is unfolded, to prevent further insertion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a board connector fixed to a circuit board, a circuit board with a connector, and a board housing case.

In order to connect a circuit board on which a power supply circuit or a control circuit is formed with an external electrical component or wiring, a board connector is widely used in automobiles and the like.
As such a board connector, L-shaped terminal fittings are embedded in the upper and lower stages of a resin connector housing, and the tip of the terminal fitting is soldered to the circuit board for electrical connection. What fixes a board | substrate with a screw | thread or a screw is known (refer patent document 1, 2).
The circuit board attached to the connector in this way is usually stored in a storage case. However, a technique is known in which a board guide groove is provided on the inner wall of the storage case and the board is inserted and held (patent). References 3 and 4).

JP 2001-85091 A (paragraph 0012) JP 2007-123165 A (paragraph 0021) Japanese Patent No. 3129138 Japanese Patent No. 3500104

However, in the case of the techniques described in Patent Documents 1 and 2, after the circuit board is soldered to the connector, a work process of fixing with screws and screws is required, resulting in inferior productivity and aligning fastening parts such as screws and screws. There is a problem that the cost is increased due to an increase in the number of parts and the work management is increased.
That is, according to the present invention, when a circuit board is fixed to a connector, a fastening part such as a screw or a screw is not required, the cost is reduced, and the circuit board fixing work is simplified to improve productivity. An object is to provide a connector, a circuit board with a connector, and a board housing case.

In order to solve the above-mentioned problems, a board connector according to the present invention is fixed to a connector housing and the connector housing, and extends from one end wall of the connector housing to form an extending portion, and is bent through a bent portion. A terminal fitting that is connected to the tip, and is soldered by being inserted into the circuit board, and provided at the circuit board at a position that extends from the one end wall and is soldered to the tip. And fixing means for fixing the circuit board by engaging with the cuts or holes formed therein, and the fixing means is configured to insert the tip part into the circuit board from a direction in which the tip part extends. A chuck portion that is inserted into the hole and that expands when the notch or the hole is further inserted to prevent the circuit board from falling off; and a position at which the chuck portion expands. The circuit board is fixed in a state of being sandwiched between the chuck part and the stopper part, and having a stopper part that contacts the circuit board and prevents further insertion. .
With such a configuration, the chuck portion of the fixing means is simultaneously inserted into the notch or hole of the circuit board when the tip of the terminal fitting is inserted into the circuit board. When the tip of the terminal fitting is inserted to a position where it is soldered to the circuit board, the chuck part of the fixing means is expanded and fixed so that the circuit board is sandwiched between the stopper part. That is, in the board connector of the present invention, the circuit board can be fixed by the fixing means simultaneously with the insertion (assembly) of the terminal fitting into the circuit board, so that there is no need for another work for fixing the circuit board to the connector. Omission is planned. In addition, it is not necessary to separately prepare screws, screws and the like for fixing the circuit board, thereby eliminating the need for cost increase and work management due to an increase in the number of parts.
And since the circuit board is firmly fixed to the connector by the fixing means, the fluctuation of the circuit board can be reduced. Furthermore, since the insertion depth of the fixing means itself into the circuit board is defined by the stopper portion, it is not necessary to manage the depth when the tip end portion of the terminal fitting is inserted into the circuit board.

The fixing means may fix the circuit board near a midpoint of a side of the circuit board facing the connector housing.
With such a configuration, the amplitude of the circuit board can be reduced and the fluctuation of the circuit board can be further reduced.

The terminal fitting includes a first terminal fitting extending from the one end wall to form a first extending portion and connected to a first tip portion via a first bent portion, and a second extending portion from the one end wall. A second terminal fitting formed and extended and connected to the second tip portion via a second bent portion at a position farther from the one end wall than the first terminal fitting, and the first extension portion includes In addition, a buffer bending portion that bends in a direction intersecting with a direction in which the first extension portion extends may be formed.
With such a configuration, even if the length of the first extension part of the first terminal fitting is shorter than the length of the second extension part of the second terminal fitting and parts having different rigidity are mixed, Since the buffer bending portion is formed in the one extending portion, the substantial length of the first extending portion when the buffer bending portion is extended in the extending direction of the first extending portion is increased. As a result, the rigidity of the first extension part is close to the rigidity of the second extension part, and the stress applied to the terminal fitting due to the deflection of the circuit board as well as the second extension part can be absorbed by bending. The load applied to the soldered portion of the first terminal fitting is reduced.

When the buffer bending portion is extended in the direction in which the first extension portion extends, it is preferable that the substantial length of the first extension portion is the same as that of the second extension portion.
With such a configuration, the first terminal fitting and the second terminal fitting can be used as a common part, so that it is not necessary to prepare a plurality of terminal fittings having substantially different lengths, and the number of parts can be reduced.

The buffer bending portion is preferably bent in a direction perpendicular to a direction in which the first extension portion extends and in a thickness direction of the circuit board when the circuit board is fixed.
With such a configuration, the stress applied to the first terminal fitting due to the shake of the circuit board can be effectively absorbed. This is because a plurality of terminal fittings are connected in the surface direction of the circuit board, so that the deflection in this direction is relatively small, and the thickness direction of the circuit board (the direction perpendicular to the direction in which the first extension portion extends) This is because the swing to is larger.

  The circuit board with connector of the present invention includes the board connector and the circuit board, and the circuit board is obtained by soldering the first tip portion and the second tip portion of the board connector to the circuit board. It is fixed to.

A board housing case of the present invention includes the circuit board with connector and an outer case, and is formed by coupling the outer case and the board connector in a state where the circuit board is housed in the outer case.
It is preferable that a holding groove is formed on the inner wall of the exterior case to accommodate one of the sides of the circuit board that is not fixed to the connector.
With such a configuration, the circuit board is held (fixed) at two locations, that is, the fixing means of the connector and the holding groove of the outer case, so that the fluctuation of the circuit board can be further reduced.

  According to the present invention, when fixing the circuit board to the connector housing, it is possible to reduce the cost by eliminating the need for fastening parts such as screws and screws, and simplify the fixing work of the circuit board and improve the productivity. .

Hereinafter, embodiments of the present invention will be described.
<First Embodiment>
FIG. 1 is a perspective view showing a positional relationship between a board connector and a circuit board according to the first embodiment of the present invention. A board connector 10 (hereinafter also simply referred to as a connector 10) includes a resin connector housing 2, terminal fittings (first terminal fitting 4, second terminal fitting 6, third terminal fitting 8), and fixing means (substrates). Fixed arm) 2h.
The first terminal fitting 4, the second terminal fitting 6, and the third terminal fitting 8 are all formed by bending an elongated metal plate into an L shape, and the base ends of the first terminal fitting 4 and the second terminal fitting 6 are formed by insert molding. Etc., each of which is embedded and fixed in the connector housing 2. On the other hand, the third terminal fitting 8 is caulked with a wire harness 26 (see FIG. 7) connected to an ECU (engine control unit) connector 26e disposed outside the connector housing 2 on its proximal end side. It is a crimping terminal to be connected, and is fixed in the connector housing 2 in such a manner that it is press-fitted into an insertion hole provided in the connector housing 2. The first terminal fitting 4, the second terminal fitting 6, and the third terminal fitting 8 are extended in parallel from the fixed portion in the connector housing 2, bent downward in an L shape, and each of the other ends (tips). Part) 4s, 6s, 8s. The tip portions 4 s, 6 s, and 8 s are inserted into the through-hole conductors 34, 36, and 38 of the circuit board 30 and soldered, so that the terminal fittings 4, 6, and 8 are electrically connected to the wiring of the circuit board 30. The circuit board 12 with a connector is configured.

The first terminal fitting 4 and the second terminal fitting 6 are closer to the left side of the connector housing 2 when viewed from the opposite side of the circuit board 30, and the first terminal fitting 4 is on the lower side and the second terminal fitting 6 is on the upper side. The third terminal fittings 8 are arranged in a row on the right side of the connector housing 2.
In addition, a power supply circuit and a control circuit are formed on the circuit board 30 and various electronic components are mounted thereon.

The connector housing 2 has an elliptical housing portion 2f that is slightly wider than the circuit board 30 and an outer side (on the side opposite to the circuit board 30) provided near the first and second terminal fittings 4 and 6 of the housing portion 2f. And a male connector 2e for a gas sensor extending to (3). The housing part 2f serves as a lid of an outer case described later and seals the circuit board 30 in a watertight manner. The male connector 2e for gas sensor has a cylindrical shape with an elliptical cross section, and the base ends of the first terminal fitting 4 and the second terminal fitting 6 protrude into the cylinder, and can be electrically connected to the female connector on the gas sensor side. Yes.
The peripheral edge of the inner surface side (surface facing the circuit board 30) of the housing part 2f forms an edge 2g extending in parallel with the circuit board 30, and is fitted so that the outer edge of the exterior case is in contact with the inner surface of the edge 2g. As a result, the space between the housing 2f and the outer case is sealed. In addition, the housing | casing part 2f may be fitted via a waterproof packing, when fitted to an exterior case.

  A fixing means (substrate fixing arm) 2h extends in parallel from the one end wall 2c of the central portion of the housing portion 2f toward the circuit board 30, and a chuck portion at the tip of the substrate fixing arm 2h is provided at a corresponding position on the circuit board 30. The circuit board 30 is fixed to the board connector 10 by engaging with the notch 32.

In addition, locking pieces 20a and 20b are extended in parallel to the circuit board 30 at both ends of the edge 2g above the circuit board 30. Similarly, at both ends of the edge 2g below the circuit board 30, respectively. The locking pieces 20 c and 20 d are extended in parallel to the circuit board 30. Each of the locking pieces 20a to 20d has a rectangular locking hole in the center, and wedge-shaped projections 14a and 14b respectively provided corresponding to the locking pieces 20a to 20d on the outer surface of the exterior case are the locking holes. By entering and locking, the connector housing 2 and the outer case 14 are coupled (see FIG. 8).
Furthermore, in order to surround and protect the first terminal fitting 4, the second terminal fitting 6, and the third terminal fitting 8, a cylindrical flange 22 having an elliptical cross section extends inside the edge 2g of the housing 2f. It is installed.

FIG. 2 is a partially enlarged perspective view showing the configuration of the fixing means (substrate fixing arm) 2h. The substrate fixing arm 2h includes a chuck portion 2j extending in parallel from the one end wall 2c of the central portion of the housing portion 2f toward the circuit substrate 30, and a one end wall 2c of the central portion of the housing portion 2f toward the circuit substrate 30. It has a stopper portion 2k that extends in parallel and is positioned above the chuck portion 2j.
The chuck portion 2j has a pair of rod-like engagement rods 2j1 and 2j2 that are spaced apart from each other in the oval direction of the housing portion 2f (the direction parallel to the surface of the circuit board 30). The engagement rods 2j1 and 2j2 are formed integrally with the housing portion 2f, and bend in a direction parallel to the surface of the circuit board 30 to widen or narrow the interval between the engagement rods 2j1 and 2j2.

The stopper portion 2k has a base portion 2k3 extending from the housing portion 2f toward the circuit board 30 and a pair of rod-shaped presser ends 2k1 and 2k2 branched from the base portion 2k3 and further extending toward the circuit board 30. The presser ends 2k1 and 2k2 are arranged at intervals in a direction parallel to the surface of the circuit board 30, and the distance dw between the outer sides of the presser ends 2k1 and 2k2 is wider than the width d of the notch 32 of the circuit board 30.
Therefore, as will be described later, when the chuck portion 2j is inserted into the notch 32 and further deeply inserted, the upper surface of the circuit board 30 comes into contact with the lower surfaces of the presser ends 2k1 and 2k2, thereby preventing further insertion of the chuck portion 2j. It functions as a stopper for locking the circuit board 30.

FIG. 3 is a cross-sectional view of the board fixing arm 2h when the board fixing arm 2h is viewed from the circuit board 30 side toward the housing portion 2f.
The chuck portion 2j (engaging rods 2j1, 2j2) has a snap fit structure. That is, the cross section of the engagement rod 2j1 (the description is omitted because the engagement rod 2j2 is symmetrical with the engagement rod 2j1) has a claw shape, and gradually spreads outward from the bottom surface 2js to form a slope 2jt. A side surface 2ju that rises perpendicularly from 2jt is formed, is connected to the upper side surface 2jw that shrinks inward from the side surface 2ju through the step portion 2jv, and has a shape that extends from the upper side surface 2jw to the upper surface 2jx.
The distance d1 between the bottom surfaces 2js and 2js of the engagement rods 2j1 and 2j2 is slightly narrower than the width d of the notch 32 of the circuit board 30, while the distance dM between the side surfaces 2ju and 2ju is wider than d. The distance d2 between the upper side surfaces 2jw and 2jw is slightly narrower than d.

Therefore, when the tips of the engagement rods 2j1 and 2j2 are applied to the notch 32 of the circuit board 30, the engagement rod is inserted into the notch 32 from the bottom surface 2js and 2js side. When the engaging rods 2j1 and 2j2 are inserted deeper into the notch 32, the ends of the notch 32 press the inclined surfaces 2jt and 2jt, the engaging rods 2j1 and 2j2 are bent, and the distance between the side surfaces 2ju and 2ju becomes narrower than d. . Therefore, the step 2jv can get over the notch 32, and the engagement rod can be inserted deeper.
When the step 2jv gets over the notch 32, the engagement rods 2j1 and 2j2 are bent and returned (expanded), and the distance between the side surfaces 2ju and 2ju becomes dM. Therefore, the peripheral edge of the cut 32 (the lower surface of the circuit board 30) is caught by the step portion 2jv, and the circuit board 30 is prevented from falling off.

On the other hand, the distance between the lower surface of the presser ends 2k1, 2k2 of the stopper portion 2k and the step portion 2jv is substantially the same as the thickness t of the circuit board 30. Therefore, when the step portion 2jv gets over the notch 32, the periphery of the notch 32 (the upper surface of the circuit board 30) comes into contact with the lower surface of the presser ends 2k1 and 2k2 to prevent further insertion, and the presser ends 2k1 and 2k2 are stepped. The circuit board 30 is sandwiched between the parts 2jv.
FIG. 4 shows a mode in which the circuit board 30 is sandwiched between the pressing ends 2k1, 2k2 and the stepped portion 2jv and fixed to the board fixing arm 2h in this way.

FIG. 5 shows a state in which the circuit board 30 is fixed to the connector 10. As described above, when the tip portions are inserted into the through-hole conductors 34, 36, and 38 of the circuit board 30 from the direction in which the tip portions 4s, 6s, and 8s of the terminal fittings 4, 6, and 8 extend (from the upper side in FIG. 5). Accordingly, the chuck part 2j is inserted into the notch 32, and the circuit board 30 is locked by the stopper part 2k at a predetermined insertion depth, and the circuit board 30 is fixed to the board fixing arm 2h.
As described above, according to the board connector 10 according to the first embodiment of the present invention, the end portions 4s, 6s, and 8s of the terminal fittings 4, 6, and 8 are respectively inserted into the circuit board 30 (through-hole conductors). At the same time, since the chuck portion 2j of the board fixing arm 2h is inserted into the notch 32 and the circuit board 30 can be fixed to the board fixing arm 2h, another operation for fixing the circuit board 30 to the connector 10 is performed. It becomes unnecessary and the process can be omitted. Further, since the board fixing arm 2h is formed integrally with the connector housing 2, there is no need to separately prepare screws, screws, etc. for fixing the circuit board 30, and it is possible to increase costs and work management by increasing the number of parts. Hassle-free.

Then, since the circuit board 30 is firmly fixed to the connector 10 by the board fixing arm 2h, the vibration of the circuit board 30 can be reduced.
Furthermore, since the insertion depth is defined by the stopper portion 2k, it is not necessary to manage the depth when the tip portions of the terminal fittings 4, 6, and 8 are inserted into the circuit board 30.
Note that the notch 32 for inserting the board fixing arm 2h may be formed at the edge of the circuit board 30, so that an effective space on the circuit board 30 is not impaired.

6 is a cross-sectional view taken along the line VI-VI in FIG. In FIG. 6, the substrate fixing arm 2 h and the third terminal fitting 8 are not shown in order to describe preferred modes of the first terminal fitting 4 and the second terminal fitting 6.
The base end portions of the first terminal fitting 4 and the second terminal fitting 6 are embedded in the housing portion 2 f of the connector housing 2. The first terminal fitting 4 is extended in parallel to the surface of the circuit board 30 from the one end wall 2c located inside the housing portion 2f to form a first extension portion 4L, and the first terminal fitting 4 is interposed via the first L-shaped bent portion 4c. It is connected to the first tip 4s.
The first extending portion 4L extends in parallel to the surface of the circuit board 30 as a whole. More specifically, the first extending portion 4L slightly extends in parallel from the one end wall 2c, and then bends upward in an L shape. A crank-shaped first buffer bending portion 4b1 that is bent in an L shape so as to be parallel is formed. The first extending portion 4L extends straight in a substantially parallel manner from the first buffer bent portion 4b1 to the first L-shaped bent portion 4c, but in the vicinity of the center portion, the second buffer bent is bent in a semicircular shape downward. After forming the part 4b2, it returns to parallel.

  The buffer bending portions 4b1 and 4b2 described above are bent in a direction intersecting with the extending direction of the first extending portion 4L. Here, the “intersecting direction” refers to any direction orthogonal to the direction in which the first extending portion 4L extends (usually the surface direction of the circuit board 30). In addition to the thickness direction of the circuit board 30, for example, the circuit board This corresponds to the 30 plane direction that is orthogonal to the direction in which the first extending portion 4L extends (that is, the direction in which the plurality of first terminal fittings 4 are arranged). However, the buffer bending portion is preferably bent in the thickness direction of the circuit board 30.

On the other hand, the 2nd terminal metal fitting 6 is extended in parallel with the circuit board 30 surface from the position above the 1st terminal metal fitting 4 of the one end wall 2c, and forms the 2nd extension part 6L, and the 1st terminal metal fitting 4 ( The L-shaped bent portion 4c) is connected to the second tip end portion 6s via the second L-shaped bent portion 6c at a position farther from the one end wall 2c. That is, the second tip portion 6s is located inside the circuit board 30 with respect to the first tip portion 4s. The tip portions 4 s and 6 s are fixed to the circuit board 30 with solder 50.
Further, the base end of the first terminal fitting 4 extends in parallel to the surface of the circuit board 30 from the other end wall 2d located outside the housing portion 2f, and protrudes as a pin 4e inside the gas sensor male connector 2e. To do. Similarly, the base end of the second terminal fitting 6 extends in parallel to the surface of the circuit board 30 from the other end wall 2d, and protrudes as a pin 6e inside the gas sensor male connector 2e.

As described above, in the first embodiment, the length of the first extending portion 4L in which the first terminal fitting 4 extends in parallel with the circuit board from the one end wall of the connector housing is the second extension of the second terminal fitting 6. The part which is shorter than the length of the protruding part 6L and has different rigidity is mixed. However, since the first and second buffer bent portions 4b1 and 4b2 are formed in the first extending portion 4L, the first buffer bent portions 4b1 and 4b2 are extended when the first extending portion 4L extends. The substantial length of the 1 extension part 4L becomes long. As a result, the rigidity of the first extension part 4L becomes close to the rigidity of the second extension part 6L, and the stress applied to the first terminal fitting 4 due to the deflection of the circuit board 30 as in the second extension part 6L. Therefore, the load applied to the soldered portion of the first terminal fitting 4 is reduced.
In the first embodiment, since the load applied to the soldered portion of the first terminal fitting 4 is reduced, the strength for fixing the board connector 10 to the circuit board 30 is sufficient only by soldering. The fixing of the circuit board 30 is assisted by the board fixing arm 2h, and the fixing strength of the circuit board 30 is further improved.

In the above description, when the first terminal fitting 4 and the second terminal fitting 6 having different extension portions are mixed, the first extension fitting 4L of the first terminal fitting 4 is buffered and bent. Although the portions 4b1 and 4b2 are provided, the length of the extending portion of the third terminal fitting 8 extending from the one end wall in parallel to the circuit board is also shorter than the second extending portion 6L of the second terminal fitting 6. Therefore, you may provide a buffer bending part in the extension part of the 3rd terminal metal fitting 8. FIG.
Further, when the buffer bending portion is extended in the direction in which the first extension portion extends, if the length of the first extension portion is substantially the same as that of the second extension portion, the first terminal fitting and the second extension Since the terminal fitting can be a common part, the number of parts can be reduced.

FIG. 7 is a top view of the board connector 10 according to the first embodiment of the present invention. In the board connector 10, the board fixing arm 2 h is disposed substantially at the center of the housing portion 2 f, but in this case, the board amplitude is reduced to fix the vicinity of the midpoint of the side of the circuit board 30, The shake of the circuit board 30 can be reduced.
The first terminal fitting 4 and the second terminal fitting 6 are arranged at the same position when viewed from the vertical direction of the circuit board 30, but according to the circuit pattern on the circuit board and the like, the first terminal fitting 4 And the second terminal fitting 6 may be arranged at different positions (staggered) as viewed from the vertical direction of the circuit board 30.
The base end of the third terminal fitting 8 is connected to the wire harness 26, and the ECU connector 26e is connected to the tip of the wire harness 26.

FIG. 8 shows the process of assembling the outer case 14 to the circuit board 12 with connector according to the first embodiment of the present invention to form the board housing case.
First, the connector-attached circuit board 12 having the board connector 10 and the circuit board 30 is arranged so that the circuit board 30 faces the opening of the outer case 14 (FIG. 8A). The outer case 14 has a bottomed cylindrical shape having an elliptical cross section approximately the same size as the housing portion 2 f of the board connector 2, and can accommodate the circuit board 30 along a predetermined groove in the outer case 14. ing. Further, wedge-shaped projections (only two projections 14a and 14b are shown in FIG. 8) are formed on the outer surface of the outer case 14 at positions corresponding to the locking pieces 20a to 20d of the board connector 2. The outer edge 14 g of the case 14 has a slightly smaller diameter than the edge 2 g of the board connector 2.

  Therefore, the casing 2f is fitted to the outer case 14 so that the circuit board 30 is accommodated in the outer case 14, and the protrusions 14a and 14b of the outer case 14 are the locking pieces 20a to 20d of the board connector 2. Then, the board housing case 16 can be formed by joining the connector housing 2 and the outer case (FIG. 8B). At this time, the outer edge 14g of the outer case comes into contact with the inner surface of the edge 2g of the housing 2f to seal the circuit board 30 in a watertight manner, and the circuit board 30 is safely held in the board housing case 16.

In the substrate housing case 16, the gas sensor male connector 2e is connected to a gas sensor (not shown), the ECU connector 26e is connected to the ECU, and a detection signal from the gas sensor is transmitted by a circuit board 30 on which a sensor control circuit is mounted. It is converted into a concentration signal and transmitted to the ECU. Examples of the gas sensor include an oxygen sensor that detects the oxygen concentration in the exhaust gas, a full-range air-fuel ratio sensor, and a NO _x sensor that detects the NO _x concentration in the exhaust gas.
In this embodiment, the board housing case 16 is connected to the ECU and the gas sensor by connectors, but may be connected to a glow plug instead of the gas sensor. In this case, the circuit board is used for glow plug control. A circuit is formed.

FIG. 9 is a cross-sectional view of the outer case 14. On the inner wall of the bottom surface of the outer case 14, a holding groove 14 e is formed in which the leading edge of the accommodated circuit board 30 (the edge facing the edge fixed to the connector) is accommodated. The holding groove 14e is formed between two pieces 14e1 and 14e2 that rise from the inner wall of the bottom surface of the outer case 14 toward the inside.
In this way, since the circuit board 30 is held at the two locations of the connector and the holding groove of the exterior case 14, the vibration of the circuit board 30 can be further reduced.
A holding groove may be formed on the side wall of the outer case 14, and in this case, the side of the circuit board 30 is accommodated in the holding groove.

<Second Embodiment>
Next, a board connector according to a second embodiment of the present invention will be described with reference to FIG. The board connector according to the second embodiment is the same as the board connector according to the first embodiment except that the configuration of the board fixing arm is different. Description is omitted. In FIG. 10, the first terminal fitting 4 and the second terminal fitting 6 are partially omitted so that the shape of the board fixing arm can be grasped.
FIG. 10 is a side sectional view of the connector 10B. A fixing means (substrate fixing arm) 2x formed integrally with the connector housing 2B includes an arm main body 2y and a chuck portion 2z. The arm body 2y has a prismatic shape extending in parallel from the one end wall 2c of the central portion of the housing portion 2f toward the circuit board 30B. In this embodiment, a round hole 32B for engaging with the board fixing arm 2x is opened on one side of the circuit board 30B (side on which the through hole for connection with the terminal fitting is formed). .

In the case of the second embodiment, since the hole 32B is not cut in the circuit board 30B, the chuck portion 2z as a whole has a substantially cylindrical shape smaller in diameter than the hole 32B so that it can be inserted into the hole 32B. . The chuck portion 2z is integrally attached to the lower surface 2y1 at the tip of the arm body 2y so that the axial direction of the chuck portion 2z is perpendicular to the surface of the circuit board 30B.
In this way, as in the first embodiment, when the tip end of the terminal fitting is inserted into the through-hole conductor of the circuit board 30B, the chuck portion 2z is simultaneously inserted into the hole 32B, and the board fixing arm will be described later. The circuit board 30B can be fixed to 2x.

  The chuck portion 2z has a snap-fit structure like the chuck portion in the first embodiment, and has two claw-like piece portions 2z1 and 2z2. The shape of the cross section in the axial direction of the claw-like piece portions 2z1 and 2z2 is the same as that of the engagement rods 2j1 and 2j2 shown in FIG. However, as described above, the radial cross sections of the claw-shaped piece portions 2z1 and 2z2 are semicircular so that the chuck portion 2z can be inserted into the hole 32B, and the radial cross section of the chuck portion 2z is a circle as a whole. It is supposed to be. Then, by increasing the diameter of the side surfaces of the claw-shaped piece portions 2z1 and 2z2 (corresponding to the side surface 2ju in FIG. 3) from the hole 32B, the claw-shaped piece portion The side surfaces of 2z1 and 2z2 are expanded to come into contact with the lower surface of the circuit board 30B to prevent the board from falling off.

Here, the chuck portion 2z is attached so as to be displaced slightly toward the one end wall 2c from the tip of the arm body 2y. Therefore, when the side surfaces of the claw-shaped piece portions 2z1 and 2z2 get over the hole 32B, the periphery of the hole 32B (the upper surface of the circuit board 30B) abuts the lower surface 2y1 to prevent further insertion, and the lower surface 2y1 and the claw-shaped piece The circuit board 30B is sandwiched between the portions 2z1 and 2z2.
Thus, the lower surface 2y1 of the arm main body 2y constitutes a stopper portion.

As described above, also in the second embodiment, when the tip portions of the terminal fittings 4, 6, and 8 are inserted into the through-hole conductors of the circuit board 30B, the chuck portion 2z is simultaneously inserted into the hole 32B, and the board fixing arm is inserted. Since the circuit board 30B can be fixed to 2x, a separate operation for fixing the circuit board 30B to the connector 10B is not required, and the process can be omitted. Further, since the board fixing arm 2x is formed integrally with the connector housing 2B, there is no need to separately prepare screws, screws, etc. for fixing the circuit board 30B. Hassle-free.
Since the circuit board 30B is firmly fixed to the connector 10B by the board fixing arm 2x, the vibration of the circuit board 30B can be reduced.

In addition, it is preferable to make the width of the arm body 2y larger than the hole 32B because the contact area between the lower surface 2y1 of the arm body 2y and the circuit board 30B is increased.
Alternatively, the width of the arm main body 2y may be narrowed so that only the portion in contact with the circuit board 30B is expanded in a flange shape.

FIG. 11 shows another example of the arrangement of the first terminal fitting and the second terminal fitting. FIG. 11 shows only one end wall 2c of the connector housing 2 in FIG. 6, the first terminal fitting, and the second terminal fitting so that the positional relationship can be understood. Since it is the same, description is abbreviate | omitted.
FIG. 11A shows a case where the second terminal fitting 61 is arranged in two stages so that the first terminal fitting 41 is on the lower side and the first terminal fitting 41 is on the upper side. In this case, the first terminal fitting 41 and the second terminal fitting 61 are located at different positions (staggered) when viewed from the vertical direction of the circuit board (not shown) so that the first terminal fitting 41 and the second terminal fitting 61 do not interfere with each other. ). In FIG. 11A, the first extending portion 41L of the first terminal fitting 41 has an S-shape in a direction perpendicular to the direction in which the first extending portion 41L extends (the direction parallel to the surface of the circuit board). A buffer bending portion 41b to be bent is provided.
FIG. 11B shows a case where the first terminal fitting 42 and the second terminal fitting 62 are arranged in a row at the same height position on the one end wall 2 c of the connector housing 2. In FIG. 11B, the first extending portion 42L of the first terminal fitting 42 is provided with a buffer bent portion 42b that is bent in a V shape in a direction perpendicular to the extending direction of the first extending portion 42L. .

The present invention is not limited to the above embodiment. The board connector of the present invention can be applied not only to control of an automobile engine but also to all uses.
The position and the number of fixing means (substrate fixing arms) are not limited. In the above-described embodiment, the fixing means is arranged at substantially the center of the housing portion of the connector housing, and the vicinity of the midpoint of the side of the circuit board is fixed. For example, the fixing means is fixed to both ends of the housing portion of the connector housing. Means may be arranged to fix both ends of the side of the circuit board.
Further, the chuck portion of the fixing means is not limited to the snap-fit structure, but may be any mechanism that expands and prevents the circuit board from falling off.

  Further, in the present invention, when the first terminal fitting and the second terminal fitting are provided, the buffer bending portion may not be provided in the first extension portion of the first terminal fitting. Further, the number of buffer bent portions formed on the first terminal fitting may be one or more, and the number of installed portions is not limited. Further, the shape of the buffer bending portion is not limited, and may be not only a case where the curve is smoothly curved but also a case where it is bent with a corner such as a V-shape or a stepped portion. As long as the length of the first extending portion is extended in the direction in which the first extending portion extends, the bent portion includes any form as long as the substantial length of the first extending portion is increased.

It is a perspective view which shows the positional relationship of the board | substrate connector which concerns on embodiment of this invention, and a circuit board. It is a partial expansion perspective view which shows the structure of a fixing means (board | substrate fixing arm). It is sectional drawing of a fixing means (board | substrate fixing arm). It is a figure which shows the aspect which pinches | interposes a circuit board between a chuck | zipper part and a stopper part, and fixes to a board | substrate fixed arm. It is a perspective view which shows the state which fixed the board | substrate connector which concerns on embodiment of this invention to the circuit board. It is sectional drawing which follows the VI-VI line of FIG. 1 is a top view of a board connector according to an embodiment of the present invention. It is a figure which shows the process of assembling an exterior case to a circuit board with a connector, and comprising a board | substrate storage case. It is sectional drawing of an exterior case. It is side surface sectional drawing which shows the connector for substrates which concerns on the 2nd Embodiment of this invention. It is a figure which shows another example of the arrangement | positioning aspect of a 1st terminal metal fitting and a 2nd terminal metal fitting.

Explanation of symbols

2, 2B connector housing 2c one end wall of connector housing 2h, 2x fixing means (board fixing arm)
2j, 2z Chuck part 2k, 2y Stopper part 4, 41, 42 First terminal fittings 4L, 41L, 42L First extension part 4s First tip part 4c First L-shaped bent part 4b1, 4b2, 41b, 42b Buffered bent part 6, 61, 62 Second terminal metal fittings 6L, 61L, 62L Second extending portion 6s Second tip 6c Second L-shaped bent portion 10, 10B Substrate connector 12 Circuit board with connector 14 Exterior case 16 Substrate housing case 30, 30B circuit board 32 notch 32 (circuit board) hole 32B (circuit board) hole 34, 36, 38 through-hole conductor (circuit board)

Claims (8)

A connector housing;
It is fixed to the connector housing, and extends from one end wall of the connector housing to form an extended portion, and is connected to the distal end portion via a bent portion. The distal end portion is inserted into the circuit board and soldered. Terminal fittings,
A fixing means that extends from the one end wall and engages a notch or a hole provided in the circuit board at a position where the circuit board is soldered to the tip, and fixes the circuit board;
The fixing means is inserted into the notch or the hole when the tip is inserted into the circuit board from the direction in which the tip extends, and is expanded when further inserted into the notch or the hole. A chuck portion that prevents the circuit board from falling off, and a stopper portion that contacts the circuit board at a position where the chuck portion expands to prevent further insertion,
A board connector in which the circuit board is fixed in a state of being sandwiched between the chuck part and the stopper part.   The board connector according to claim 1, wherein the fixing means fixes the circuit board in the vicinity of a midpoint of a side of the circuit board facing the connector housing. The terminal fitting includes a first terminal fitting extending from the one end wall to form a first extending portion and connected to a first tip portion via a first bent portion, and a second extending portion from the one end wall. A second terminal fitting formed and extended and connected to the second tip through a second bent portion at a position farther from the one end wall than the first terminal fitting,
The board connector according to claim 1, wherein a buffer bending portion that is bent in a direction intersecting with a direction in which the first extension portion extends is formed in the first extension portion.   4. The device according to claim 1, wherein when the buffer bending portion is extended in a direction in which the first extension portion extends, a substantial length of the first extension portion is the same as that of the second extension portion. 5. The board connector as described in 1.   The said buffer bending part is a direction perpendicular | vertical to the direction where the said 1st extension part is extended, and when the said circuit board is fixed, it is bent in the thickness direction of this circuit board. Board connector. A board connector according to any one of claims 1 to 5 and a circuit board,
A circuit board with a connector, wherein the circuit board is soldered to the tip, and the circuit board is fixed to the board connector by the fixing means. A circuit board with a connector according to claim 6, and an exterior case,
A substrate housing case formed by coupling the exterior case and the board connector in a state where the circuit board is housed in the exterior case.   The board storage case according to claim 7, wherein a holding groove is formed in an inner wall of the exterior case to store one of sides of the circuit board that are not fixed to the connector.

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