JP2513596Y2 - Terminal structure for external connection of electrical equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external connection terminal structure of an electric device for connecting a conductive printed portion of a printed circuit board mounted inside and an external connection terminal.

[0002]

2. Description of the Related Art Conventionally, there have been the following external terminal structures for electrical equipment of this type, which are shown in FIGS.
It will be described based on.

This electric device is an electromagnetic relay and is fixed to the body A so as to have a body A made of an insulating material and an internal connection portion B ₁ and an external connection portion B ₂ on the inner surface side and the outer surface side of the body A, respectively. External connection terminal B and conductive printed section C ₁
Is connected to the internal connection part B ₁ of the external connection terminal B and the body A
The printed circuit board C is mounted on the inner surface side of the body A, and the main body portion D is mounted on the inner surface side of the body A and is composed of members such as an electromagnet portion and a contact portion.

A notch B _{3 having a} width slightly larger than the thickness of the printed circuit board C is provided at the end of the internal connection portion B ₁ of the external connection terminal B.
The printed circuit board C is inserted into the notch B _{3 so} that the conductive print portion C ₁ is located. As shown in FIG. 9, the conductive print portion C ₁ and the internal connection portion B ₁ are soldered with solder F. Connected.

[0005]

In the above-mentioned conventional external connection terminal structure of an electric device, the external connection terminal B is used.
Since the internal connection part B ₁ of B and the conductive printed part C _{1 of the} printed circuit board C are directly connected in a rigid body by the solder F, if external force is applied to the external connection part B ₂ of the external connection terminal B, The connection portion B ₁ may be displaced and a crack may be generated in the solder F, and the external connection terminal B and the conductive printed portion C ₁ may not be electrically connected.

In order to prevent this, a flexible lead wire may be connected between the internal connection portion B ₁ and the conductive printed portion C ₁ , but in this case, the work is complicated. At the same time, an extra space for accommodating the lead wire is required.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to facilitate the work of connecting the internal connection portion of the external connection terminal and the conductive printed portion of the printed circuit board, and the external connection. An object of the present invention is to provide a terminal structure for external connection of an electric device, which is capable of preventing the conduction of the connection part from being impaired even when an external force is applied to the external connection part of the connection terminal.

[0008]

In order to solve the above-mentioned problems, a terminal structure for external connection of an electric device according to claim 1 has a body made of an insulating material and internal connection on the inner surface side and the outer surface side of the body. External connection terminals fixed to the body so as to each have an external connection portion and an external connection portion, and a printed circuit board mounted on the inner surface side of the body where the conductive printed portion is connected to the internal connection portion of the external connection terminal. In an external connection terminal structure of an electric device, a connection fitting formed by a spring-like conductive plate having a pin portion is fixed to the internal connection portion of the external connection terminal, and the pin portion and the A through hole for inserting a pin portion is provided in the conductive printed portion so that the conductive printed portion of the printed circuit board can be connected by soldering.

According to the second aspect of the present invention, there is provided a terminal structure for external connection of an electric device, wherein a cross-shaped hole is formed in the internal connection portion of the external connection terminal, and the cross-shaped vertical hole and the horizontal hole are respectively fitted. Thus, a vertical coupling portion and a horizontal coupling portion for crimping and coupling the external connection terminal and the connection fitting to each other are provided on the connection fitting.

[0010]

According to another aspect of the present invention, there is provided a terminal structure for external connection of an electric device, wherein a connection metal fitting having a pin portion made of a conductive plate having spring property is fixed to an internal connection portion of the external connection terminal. Since the pin portion and the conductive printed portion of the printed circuit board are provided with through holes through which the pin portion is inserted so that the conductive printed portion of the printed circuit board can be soldered and connected, the internal connecting portion of the external connection terminal and the printed portion can be printed. Connection work with the conductive printed part of the board can be done easily, and even when external force is applied to the external connection part of the external connection terminal, the connection fitting with spring property acts as a buffer, so it is possible to There is no possibility of cracks and loss of conduction.

According to another aspect of the present invention, there is provided an external connection terminal structure for an electric device, wherein a cross-shaped hole is provided in an internal connection portion of the external connection terminal, and the cross-shaped vertical hole and the horizontal hole are respectively fitted. Since the vertical fittings and the horizontal fittings for caulking the external connection terminals and the connection fittings to each other are provided on the connection fittings, the work is simple and easy when connecting the connection fittings to the external connection terminals. It will be surely combined.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

This electric device is an electromagnetic relay, and comprises a body 1, an external connection terminal 2, a connection fitting 3, a printed circuit board 4, and a main body 5.

The body 1 is made of an insulating material such as synthetic resin and is formed in a box-like shape having a recess on the inner surface side.

The external connection terminal 2 is formed of a conductive material in a substantially flat plate shape, and has a corner portion 2 of the body 1 so as to have an internal connection portion 2a and an external connection portion 2b on the inner surface side and the outer surface side of the body 1, respectively. It is fixed by penetrating each of the places.

The connecting fitting 3 has a spring property and a plate thickness of 0.2 mm.
With a conductive plate of a certain degree, it is formed in a substantially flat plate shape symmetrical with respect to the central axis. More specifically, as shown in FIG. 3, one end has a width of 0.
A pin portion 3a having a size of about 5 mm is provided, and the other end portion is provided with a folding piece 3b which is folded back leaving one side orthogonal to the central axis. Then, as shown in FIG. 4, the connection fitting 3 is inserted into the recess 1a of the body 1 provided on the one surface side of the internal connection portion 2a of the external connection terminal 2, and at this time, the folding piece 3b is By contacting the side wall 1b forming the recess 1a, the connection fitting 3 is in close contact with one surface side of the internal connection portion 2a, and in that state, the connection fitting 3
3 is welded and fixed to the internal connecting portion 2a. Although there are two external connection terminals 2 as shown in FIG.
Is symmetrical with respect to the central axis, so it can be inverted and used for both, and the pin part 3a of the connection fitting 3 is the external connection terminal.
It will be extended outward in a direction orthogonal to the central axis of 2.

The printed circuit board 4 is formed in a U shape having a connecting portion 4c, and electronic components such as resistors are mounted on one surface of the printed circuit board 4.
Each terminal of the electronic component protruding from the other surface is connected to the conductive printed portion 4a by being soldered appropriately. Then, through holes 4b having a diameter of about 1 mm are provided at the two conductive printed portions 4a wired to the terminals of the electronic component connected to the external connection terminals 2.

The main body 5 is made up of members such as an electromagnet portion and a contact portion, and is mounted in a concave portion on the inner surface side of the body 1.
The contact portion is opened and closed by turning on and off the exciting current of the coil wound around the coil bobbin 51 forming the electromagnet portion.

A projection 51a is formed on the collar portion of the coil bobbin 51.
The protrusions 51b and the protrusions 51b are provided at intervals so as to form a groove in the direction in which the pin portion 3a of the connection fitting 3 extends, and the distance between the grooves is such that the printed circuit board 4 can be fitted. The dimensions are almost the same as the thickness. Further, the outside of the protrusion 51b is chamfered so that the printed circuit board 4 can be easily fitted.

In the printed circuit board 4, the through hole 4b is inserted into the pin portion 3a of the connection fitting 3 and the U-shaped connecting portion 4c is formed in the coil bobbin as shown by the arrow in FIG.
The pin portion 3a that is fitted in the groove provided in the 51 and then protrudes from the other surface of the printed circuit board 4 and the conductive printed portion 4a are soldered and connected. FIG. 2 shows this mounted state.

Next, a second embodiment will be described below with reference to FIGS. This is only partially different from the first embodiment in the configuration of connecting the connection fitting 3 to the external connection terminal 2, and substantially the same members are designated by the same reference numerals.

The internal connection portion 2a of the external connection terminal 2 has a cross-shaped hole composed of a vertical hole 21a and a horizontal hole 21b orthogonal to each other.
21 are provided. The vertical hole 21a has a width substantially the same as the plate thickness of the connecting fitting 3, and the horizontal hole 21b has a width and a length substantially the same as the plate thickness and the plate width of the connecting fitting 3, respectively.

The connecting fitting 3 is provided with a pin portion 3a at one end as in the first embodiment, but is provided with a folding piece 3b at the other end unlike the first embodiment. Absent. And
At the other end, a horizontal joint portion 31 is formed with a right-angled bent portion 31b at the tip of a notch portion 31a that divides the tip into two forks with a width slightly smaller than the plate thickness. 32 extends from one end of the plate width direction at a right angle in the same direction as the right-angled bent portion 31b, and then gradually extends in the longitudinal direction, and a right-angled bent portion 32a toward the cutout portion 31a is formed at the tip thereof. Has been formed.

As shown in FIG. 5, the connecting fitting 3 is provided with a terminal 2 for external connection between the horizontal connecting portion 31 and the vertical connecting portion 32.
After the internal connecting portions 2a of the horizontal connecting portions 31 are arranged so that they are positioned, as shown in FIG.
7, and the right-angled bent portion 32a of the vertical connecting portion 32 is inserted into the vertical hole 21a of the internal connecting portion 2a, as shown in FIG. At this time, the horizontal joint portion 31 is formed by the right-angled bent portion 31.
The width of b is approximately the same as the longitudinal direction of the horizontal hole 21b, and the notch width of the notch 31a is the right angle bend 32a of the vertical joint 32.
Since it is slightly narrower than the plate thickness, the right-angled bent portion 32a fits into the notch 31a, that is, the inner fitting portion of the connection fitting 3 and the external connection terminal 2 is fitted. 2a will be caulked to each other.

In any of the first and second embodiments of the external connection terminal structure of such electric equipment, the connection fitting 3 formed by the conductive plate having a spring property and having the pin portion 3a.
Is fixed to the internal connection portion 2a of the external connection terminal 2 fixed to the body 1, the through hole 4b is provided in the conductive printed portion 4a of the printed circuit board 4, and the pin portion 3a is inserted into the through hole 4b. Since it is designed to be soldered to the conductive printed part 4a, the connection work between the internal connected part 2a of the external connection terminal 2 and the conductive printed part 4a of the printed circuit board 4 is connected via the lead wire. It is not as complicated as in the case, and even when external force is applied to the external connection part 2b of the external connection terminal 2,
Since the connection fitting 3 having a spring property serves as a buffer, a crack is not generated in the solder-connected portion and the conduction is not impaired. Further, the printed circuit board 4 is fixed by soldering at two points by the pin portion 3a of the connection fitting 3 and also fitted in the groove provided on the coil bobbin 51 and fixed at three points. The fixing of itself is also secure.

Further, in the second embodiment, when the external connection terminal 2 and the connection fitting 3 are fixed, the cross-shaped hole 21 is formed.
Is provided in the internal connection portion 2a of the external connection terminal 2, and the vertical coupling portion 31 and the horizontal coupling portion 32 provided in the connection fitting 3 are respectively fitted into the cross-shaped vertical hole 21a and horizontal hole 21b, whereby caulking is performed. Since they are coupled, the work is simple and reliable.

[0027]

According to the first aspect of the present invention, there is provided a terminal structure for external connection of an electric device, wherein a connection metal fitting having a pin portion made of a conductive plate having a spring property is fixed to an internal connection portion of the external connection terminal. In addition, since the pin portion and the conductive printed portion of the printed circuit board are provided with through holes through which the pin portion is inserted so that the conductive printed portion can be soldered and connected, the internal connection portion of the external connection terminal is formed. Can be easily connected to the conductive printed part of the printed circuit board, and even if an external force is applied to the external connection part of the external connection terminal, the connection fitting with spring property acts as a buffer, so solder connection is made. There is no possibility that a crack will be generated in a part and the conduction will be impaired.

According to a second aspect of the present invention, there is provided a terminal structure for external connection of an electric device, wherein a cross-shaped hole is provided in an internal connection portion of the external connection terminal, and the cross-shaped vertical hole and the horizontal hole are respectively fitted. Since the vertical fittings and the horizontal fittings for caulking the external connection terminals and the connection fittings to each other are provided on the connection fittings, the work is simple and easy when connecting the connection fittings to the external connection terminals. It will be surely combined.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the above-mentioned printed circuit board is mounted.

FIG. 3 is a perspective view showing the same connection fitting.

FIG. 4 is a perspective view showing a state in which the above connecting fitting is fixed to an internal connecting portion of an external connecting terminal.

FIG. 5 is a perspective view showing an essential part of a second embodiment of the present invention.

FIG. 6 is a perspective view showing a state in which a lateral coupling portion of the above-mentioned connecting fitting is fitted in a lateral hole of an internal connecting portion of an external connecting terminal.

FIG. 7 is a perspective view showing a state in which the above-mentioned connecting fitting is caulked and joined to a cross-shaped hole of an internal connecting portion of an external connecting terminal.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a partial perspective view showing a state in which the above-mentioned printed board is mounted.

[Explanation of symbols]

 1 Body 2 External connection terminal 2a Internal connection part 2b External connection part 3 Connection fitting 3a Pin part 4 Printed circuit board 4a Conductive printed part 4b Through hole

Claims (2)

(57) [Scope of utility model registration request] 1. A body made of an insulating material, an external connection terminal fixed to the body so as to have an internal connection portion and an external connection portion on an inner surface side and an outer surface side of the body, respectively, and a conductive printed portion having an external connection terminal. In the terminal structure for external connection of an electric device, comprising a printed circuit board connected to the internal connection part of and attached to the inner surface side of the body, a conductive plate having a spring property in the internal connection part of the external connection terminal. By fixing the connection fitting formed with the pin portion by, the through hole through which the pin portion is inserted is provided in the conductive printed portion so that the pin portion and the conductive printed portion of the printed circuit board can be soldered and connected. A terminal structure for external connection of an electric device, which is characterized in that 2. A cross-shaped hole is provided in an internal connection portion of the external connection terminal, and the external connection terminal and the connection fitting are caulked to each other by being fitted in the vertical hole and the horizontal hole of the cross, respectively. The terminal structure for external connection of an electric device according to claim 1, wherein a vertical coupling portion and a horizontal coupling portion are provided on the connection fitting.