JP2003092459A - Printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an insertion mistake when a connector having the small number of poles is inserted into a printed wiring board having insertion holes Y having the large number of poles. SOLUTION: In a printed wiring board 11 having insertion holes Y adaptive to the large number of poles, there is provided an incorrect insertion preventing means that insertion holes Z exceeding the number of poles are set as reference holes of an automatically mounting part 14, whereby an incorrect insertion into the insertion holes Z exceeding the number of poles can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board for general household appliances.

[0002]

2. Description of the Related Art Conventional printed wiring boards are often equipped with connectors with different numbers of poles so that they can be applied to multiple models of the same type, with the aim of reducing mold costs by sharing models. We are processing the most number of insertion holes in the market.

FIG. 4 is a partial block diagram of a conventional printed wiring board. In FIG. 4, the printed wiring board 1 is provided with an insertion hole 3 into which the connector 2 is inserted. This insertion hole 3
Corresponds to a plurality of connectors 2 having different numbers of poles, and has an insertion hole B having the largest number of poles. When the connector 2 of the relevant model having a small number of poles is fitted into the insertion hole A, the fitting is performed with the excess insertion hole BA (minus) remaining.

For this reason, in a connector processing maker, a protrusion 4 is provided at a contact portion with the printed wiring board 1 and is inserted into a dedicated fitting hole 5 provided in the printed wiring board 1.
There is also a connector 2 provided with prevention of incorrect insertion.

[0005]

However, in the above-mentioned conventional structure, the multi-pole connector 2 cannot be automatically inserted by a machine and must be manually inserted by an operator. With this manual insertion, in the case of a model with a small number of poles, there are many cases in which the connector 2 is mistakenly inserted into the insertion hole B of the portion that exceeds the number of poles, and it is detected as a defect in the inspection process, and soldering is performed again. There was a lot of processing loss that had to be removed and assembled.

The type in which the protrusions 4 provided by the manufacturer are fitted is also effective, but in the production process in which the production of 500 or more units per day is required and the line tact is only about 20 seconds, it is possible to determine the height. Difficult to eradicate wrong insertion because it is difficult. In addition, in order to reduce the die cost in the model development by sharing the die, it is required to devise a pokayoke in the assembly process.

The present invention solves the above-mentioned conventional problems. Even when a connector with a small number of poles is manually inserted, it is possible to easily prevent erroneous insertion into an insertion hole in which the number of poles is exceeded. It is an object to provide a printed wiring board having an effective pokayoke that eliminates processing loss.

[0008]

In order to solve the above-mentioned conventional problems, the printed wiring board of the present invention is an insertion hole adapted to a plurality of poles of a connector, and an insertion hole exceeding the number of poles is automatically inserted. An erroneous insertion preventing means is provided as a reference hole for the mounted component. Due to this erroneous insertion preventing means, the holes exceeding the number of poles are effective means for pokayoke, because the insertion of the connector of the model having a small number of poles is restricted by other automatic mounting parts.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is an insertion hole adapted to a plurality of pole numbers, and is provided with erroneous insertion prevention means using the insertion hole exceeding the number of poles as a reference hole of an automatic mounting component. As a result, other automatic mounting parts will be inserted in advance in the insertion holes that exceed the number of poles, and it will be a pokyoke for inserting a connector with a small number of poles, which will lead to elimination of processing loss and improve the ease of assembly. Be peeled off.

The invention as defined in claim 2 is particularly defined by claim 1.
By closing the insertion hole of the described erroneous insertion prevention means with the automatic mounting component, Pokayoke can be applied without increasing the diameter of the insertion hole of the connector.

The invention as defined in claim 3 is particularly defined by claim 1.
By closing the insertion hole of the erroneous insertion prevention means described above with the surface mounting component of the solder attachment portion, space saving of the component surface can be achieved.

[0012]

Embodiments of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIG. 1 is a partial configuration diagram of a printed wiring board in Embodiment 1 of the present invention. In FIG. 1, a printed wiring board 11 is provided with an insertion hole 13 into which a connector 12 is inserted. The insertion hole 13 corresponds to a plurality of connectors 12 having different numbers of poles, and the insertion hole Y having the largest number of poles is provided. When the connector 12 of the model having a small number of poles is fitted into the insertion hole X, the fitting is performed in a state in which the excess insertion hole Y-X (-means minus, the same applies hereinafter) remains.

Further, the excess insertion hole Y of the connector 12
Another automatic mounting component 14 is mounted using the insertion hole Z where -X branches as a reference hole. In this case, as the automatic mounting component 14, a jumper wire or the like which has the lowest cost and is widely used is used, but it is not particularly specified. The advantage of the automatic mounting component 14 is that it can be manufactured by inputting insert information.
By confirming the installation by the product check, it is possible to save the trouble of checking each product one by one.

The printed wiring board 1 constructed as described above
1, when the connector 12 having a small number of poles is manually inserted, the excessive insertion hole Y-X branching the insertion hole Z is blocked by the automatic mounting component 14 being mounted in advance,
Even if you try to insert it, you can not insert it and you can prevent mistakes.

As described above, it is possible to prevent the wrong insertion due to the manual insertion by a simple means, and the assembly loss can be improved by eliminating the processing loss.

In this embodiment, when the connector 12 has an insertion pitch of 2.5 mm, which is suitable for the pitch of the automatic insertion machine, the automatic mounting parts are directly inserted from the excessive insertion holes Z to Y of the connector 12. However, in connectors having different pitches, one insertion hole Z may be used as a reference hole and arranged in a mountable range.

(Embodiment 2) FIG. 2 is a partial configuration diagram of a printed wiring board in Embodiment 2 of the present invention. In FIG. 2, with respect to the insertion hole Z where the excess insertion hole Y-X of the connector 12 branches, another automatic mounting component 14 is arranged so as to close this insertion hole Z.

The reason why the insertion hole Z is not used as the reference hole in the erroneous insertion preventing means constructed as described above is that the connector is currently multipolarized, and the pitch is reduced and the pin arrangement is reduced.
Columnization is being done. The wire diameter of the pin has also become thinner accordingly, and the hole diameter has also become thinner with the specified dimensions that match it.
If you insert a jumper wire or the like here, a mistake will occur in the self-inserting machine, so you must increase the hole diameter.

Specifically, the linear shape of the jumper wire is 0.6
In mm, this insertion hole diameter is 1.0 mm. On the other hand, the connector has a pin diameter of 0.4 mm and an insertion hole of 0.8 mm. The combination of a large pin and a thin pin makes it easy to make a mistake of not attaching the solder, thereby preventing a new problem.

As described above, the insertion error can be surely eradicated by the simple means, and the assembly property can be improved by the extremely effective means for preventing the mistake of the solder adhesion.

(Embodiment 3) FIG. 3 is a partial constitutional view of a printed wiring board according to Embodiment 3 of the present invention, showing a soldering surface. In FIG. 3, solder lands are formed so that other surface mount components 15 can be mounted in the solder attachment portions of the insertion holes Z where the excess insertion holes Y-X of the connector 12 branch. By mounting this surface mount component, the insertion hole Z
Will be closed.

The erroneous insertion preventing means constructed as described above can prevent the erroneous insertion of the connector by closing the insertion hole Z with the surface mounting component.

Further, by mounting the surface-mounted components, it is necessary to secure a space on the component surface for arranging the automatically mounted components on the component surface, a land space on the solder surface, and a miniaturization of the present print wiring. The board also solves the space problem.

The difference in size between the component mounted on the component surface and the surface mount component is remarkable. In the comparison with the jumper wires given in the example, the surface mount component is 1.6 × 0.8 mm and the component surface component is It can be seen that the required space is extremely small with 5 x 0.6 mm. As described above, depending on the shape of the printed wiring board, it is possible to select a method capable of surely eliminating the insertion error by various means such as the component surface and the solder surface.

[0026]

As described above, according to the invention described in claims 1 to 3, a connector having a small number of poles is manually inserted into a printed wiring board having a common insertion hole having a large number of poles. Even at times, by closing the insertion holes that exceed the number of poles,
This has the effects of eliminating insertion errors, reducing processing loss and improving productivity, and increasing the degree of freedom in selecting implementation conditions for miniaturization from among various conditions.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a printed wiring board according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view of a printed wiring board according to a second embodiment of the present invention.

FIG. 3 is a partial perspective view of a printed wiring board according to a third embodiment of the present invention.

FIG. 4 is a partial perspective view of a conventional printed wiring board.

[Explanation of symbols]

11 Printed wiring board 12 connectors 13 insertion holes X Insertion hole for the connector Y Insertion hole for the connector with the most poles Y-X Excessive insertion hole Z Insertion holes that branch off excess insertion holes 14 Automatic mounting parts 15 surface mount components

Claims (3)

[Claims] 1. A printed wiring board having insertion holes adapted to a plurality of poles in the same type of connector and provided with erroneous insertion prevention means using the insertion holes exceeding the number of poles as reference holes for automatic mounting components. . 2. The printed wiring board according to claim 1, wherein the erroneous insertion preventing means closes the insertion holes exceeding the number of poles with an automatic mounting component. 3. The printed wiring board according to claim 2, wherein the erroneous insertion preventing means is capable of mounting a surface mountable component on a solder-attached portion of the insertion hole in which the number of poles is exceeded.