JPH0660065U - Surface mount connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a surface mount connector that can be easily and surely fixed to a printed circuit board or the like. [Structure] Protrusion 3 for fixing to housing 1 of connector 10
Is integrally formed. Further, the protrusion 3 has a hole 4 opened at the tip, and after inserting the protrusion 3 into the through hole E of the substrate B, a plug 6 having a diameter larger than the hole diameter is press-fitted into the hole 4.
Since the plug 6 is integrally formed with the projection 3 via the deformable connecting strip 8 and the like, the work is easy. Further, since the number of parts does not increase, the cost does not increase. Further, since the projection 3 is expanded in diameter and prevented from coming off when the plug is press-fitted, the connector can be fixed securely and stably.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a surface mount connector that can be easily and reliably fixed to a printed circuit board or the like.

[0002]

[Prior art]

 A surface-mount connector is one in which a plurality of plug-in type terminals that are electrically connected by being soldered to a printed circuit on the surface of a board are housed and fixed at a predetermined pitch in an insulative housing by press fitting or insert molding. This connector must be accurately positioned on the board to align the terminals with the printed circuit on the board, to prevent the terminals from coming off after soldering, and to prevent the housing from wobbling when the mating connector is inserted or removed. Secure fixing is required.

Therefore, conventionally, the structure shown in FIGS. 3 to 5 is adopted to meet the demand.

In FIG. 3, the connector A is fixed to the board B with screws C, and the positioning of the connector on the board B is performed by using pins (not shown) provided in the housing of the connector in corresponding holes of the board. It is done by plugging in.

FIG. 4 shows that the protrusion D of the connector A is inserted into the through hole E of the substrate B to prevent the connector from coming off. Further, FIG. 5 shows that the protrusion D of the connector A is inserted into the through hole E of the substrate B and then the protrusion is formed. The long pin F with a collar is driven into the hole provided inside of the projection from the root side of the projection to prevent the projection D from coming off. These are used for both positioning and fixing the connector. .

[0006]

[Problems to be solved by the device]

 The conventional surface mount connector described above has the following problems.

That is, the connector of FIG. 3 is excellent in reliability of fixing, but has a drawback that the screwing work is troublesome.

The connector of FIG. 4 is easy to mount, but has a structure in which the protrusion D bends when an external force is applied. Since it is unavoidable that a play (gap) occurs between the boards B due to a processing error, the protrusion after insertion is apt to rattle, and the fixing becomes unstable.

Further, in the connector of FIG. 5, the protrusion of the protrusion D is prevented from being bent by driving the pin F, but the pin F has a troublesome work, and the use of the pin F increases the cost.

An object of the present invention is to eliminate these problems.

[0011]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a hole for opening at the tip of the protrusion inside the fixing-like protrusion inserted into the through hole of the substrate, and a hole for press-fitting into the hole from the tip side of the protrusion. Adopt a structure that provides a plug with a diameter larger than the diameter.

It is preferable that the fixing projection is integrally formed with the housing of the connector, and the plug is integrally formed with the projection through a connecting portion that is deformable or severable by a plug pressure input.

[0013]

[Action]

 When the plug is press-fitted into the hole of the fixing projection that has passed through the board, the plug press-fitting part of the projection expands and presses against the through-hole surface of the board, so stable fixing without rattling can be performed.

Further, since a short plug may be used as long as it is press-fitted from the tip side of the protrusion, it is advantageous in terms of shortening the press-fitting time and material cost.

In addition, the connector housing, the fixing projection and the plug are integrally molded, and there is no problem of increased cost due to an increase in the number of parts and poor handling due to the independent parts. You can expect an excellent effect.

[0016]

【Example】

 FIG. 1 is an embodiment of the surface mount connector of the present invention. This connector 10 has a plurality of plug-in terminals 2 accommodated and fixed in a resin housing 1 at a predetermined pitch by a method such as press fitting or insert molding. The rear part of the terminal is pulled out to the outside of the housing and is joined to the printed circuit on the board by reflow soldering.

Reference numeral 3 in the figure denotes a fixing projection integrally formed with the housing 1. Inside the protrusion 3, a hole 4 that is opened at the tip of the protrusion is provided. Further, a check claw 5 is provided on the outer circumference of the tip of the protrusion. 6 is a plug to be inserted into the hole 4. The plug 6 has a body diameter larger than the inner diameter of the hole 4. A check claw 7 is provided on the outer periphery of the tip of the plug 6 so as to engage with the step of the inner diameter of the hole 4.

In the illustrated connector, the protrusion 3 and the plug 6 are connected by a connecting band 8 and integrally formed. The connecting band 8 is thin and has a narrow width. When the plug 6 is press-fitted into the hole 4, the connecting band 8 is deformed as shown in FIG. 1 (d) so that the groove 6a provided on the outer periphery of the plug 6 (FIG. 1 (e)) is Reference}.

As shown in FIG. 1C, the plug 6 is press-fitted into the rear hole 4 in which the protrusion 3 is inserted into the through hole E of the substrate B. As a result, the protrusion 3 expands in diameter and comes into pressure contact with the inner surface of the hole E, and the protrusion 3 is mainly prevented from coming off due to the frictional force. Therefore, the non-return pawl 5 is not always necessary in the present invention. In particular, if the tip of the projection 3 that is formed by tapering the plug 6 and passing through the hole 4 is made larger than the hole diameter by press-fitting the plug, it is possible to prevent the slip-out securely even without the check claw 5. Can be done.

Although it is desirable to integrally form the protrusion 3 and the plug 6, it is not an essential requirement.

Further, the portion for integrally connecting the protrusion 3 and the plug 6 is as shown in FIG. 2, that is, the thin connecting portion 9 or the like which is cut by the plug pressure input with no deformation margin. Good.

[0022]

[Effect of device]

 As described above, according to the present invention, the fixing projection is provided with a hole for opening at the tip of the projection, and the plug preferably formed integrally with the projection is press-fitted into the hole to prevent the projection from coming off. As a result, it is possible to reduce the number of materials and parts and the work time as well as to ensure the mounting of the connector on the board, which contributes to the improvement of the mounting efficiency and the cost of the product.

[Brief description of drawings]

FIG. 1A is a front view of a surface mount connector according to an embodiment of the present invention, FIG. 1B is a side view of the same, and FIG. 1C is an enlarged cross-sectional view taken along line XX of FIG. Sectional view (e) (b) Sectional view of the YY line part of a figure

FIG. 2 is a cross-sectional view showing another example of integrally forming a protrusion and a plug.

FIG. 3 is a diagram showing an example of a conventional fixing structure for a surface mount connector.

FIG. 4 is a diagram showing another example of a conventional surface mount connector fixing structure.

FIG. 5 is a view showing another example of a conventional surface mount connector fixing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Plug-in terminal 3 Fixing protrusion 4 Hole 5 Check claw 6 Plug 6a groove 7 Check claw 8 Connecting band 9 Thin connecting part 10 Connector B Board E Through hole

Claims (2)

[Scope of utility model registration request] 1. A projection for fixing in which a plug-in terminal which is soldered to a printed circuit on the surface of a substrate and electrically connected is housed and fixed in an insulating housing at a predetermined pitch, and which is inserted into a through hole of the substrate in the housing. In the surface mount connector provided with, a hole for opening at the tip of the protrusion is provided inside the protrusion, and a plug having a diameter larger than the diameter of the hole pressed into the hole from the tip side of the protrusion is provided. Surface mount connector. 2. The surface mount according to claim 1, wherein the protrusion is integrally formed with a housing of the connector, and the plug is integrally formed with the protrusion via a connecting portion that is deformable or severable by a plug pressure input. connector.