JPH09219132A - Switch device and electric wire connecting method to switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch device and an electric wire connecting method to the switch device by which an exclusive pressure contact device can be obviated and electric wires can be easily connected to each other. SOLUTION: In a switch device 41 having a case 49 and a circuit body 61 to which an external electric wire 57 is connected, a switch contact point 64 is formed in a part of the circuit body 61, and a pressure contact blade with which the electric wire 57 is brought into pressure contact is arranged integrally in or separately from the circuit body 61, and a cover 51 is arranged on the case 49 so as to be freely fitted and installed, and an electric wire holding part 55 to hold the electric wire 57 is formed on the cover 51. When this cover 51 is fitted to and installed in the case 49, an electric wire positioning part 69 to position the electric wire 57 is formed in a position opposed to the pressure contact blade and in a prescribed press-in depth to the pressure contact blade.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device in which a circuit body is installed and a method of connecting electric wires to the switch device.

[0002]

2. Description of the Related Art An automobile is provided with electric components, such as a power window and a power seat, which are required to be operated and controlled, and a switch device for performing a hand operation is connected to these electric components through electric wires. FIG. 7 is a side view in which a part of a conventional switch device is cut away. The case 3 of the switch device 1 is provided with first, second and third moving bodies 5, 7, 9 of which the first moving body 5 in the central portion is in the front-back direction (left and right in FIG. 7). Direction), and the left and right second and third moving bodies 7 and 9 can move in the vertical direction (vertical direction in FIG. 7).

Below the movable bodies 5, 7, 9 in FIG. 7, there are provided first, second, and third switches which are switched according to the movement of the movable bodies 5, 7, 9. (Only the first switch 11 is shown in FIG. 7). The switch 11 is provided with a compression coil spring 13 and an indenter 15 biased by the compression coil spring 13, and the indenter 15 is in pressure contact with a substantially V-shaped movable contact 17. The circuit body 19 is provided in the downward direction of the movable contact 17 (downward in FIG. 7).
And the circuit body 19 has a fixed contact 21 formed on one surface facing the movable contact 17. The movable contact 17 selectively contacts a predetermined fixed contact 21 by sliding the operation knob 23, and sends an operation signal to a control unit such as a power seat.

By the way, a bus bar 25, which is a conductor, forms a conductive pattern on the other surface of the circuit body 19 (the lower surface in FIG. 7). The fixed contact 21 is connected to a predetermined bus bar 25 via a through hole or the like formed in the circuit body 19. 8 is a plan view showing the bus bar forming surface of the circuit body, and FIG. 9 is an enlarged perspective view of the tab shown in FIG. There is a circuit body 19 of this type in which an electric wire can be directly connected to the bus bar 25 without soldering. That is, a tab 31 formed by bending the bus bar 25 is provided at the end of the bus bar 25, and the tab 31 has a blade portion 33 cut in a U shape. As shown in FIG. 9, the blade portion 33 has a width smaller than that of the conductor 37 of the electric wire 35, and when the electric wire 35 is press-fitted, the blade portion 33 breaks the insulating coating 39 and comes into contact with the conductor 37.

In the switch device 1 in which the circuit body 19 of this type is installed, a tab in the circuit body 19 installed in the case 3 or the circuit body 19 taken out from the case 3 is used by using a pressure contact device (not shown). It was possible to directly connect the electric wire 35 to the switch device 1 without pressing the electric wire 35 onto the 31 and soldering and without using a connector or the like. Therefore, the electric wire 35 can be easily connected to the switch device 1 with a small number of parts.

[0006]

However, in the above-described switch device 1, the tab 3 provided on the circuit body 19 is provided.
Since a dedicated pressure welding device is required to press the electric wire 35 to the first wire, there is a problem that the equipment cost is increased and the number of man-hours for pressure welding by the pressure welding device is increased. In addition, when disposing the bus bar 25, it is necessary to use an insulating wiring board made of a heat-resistant resin or the like for the circuit body 9, which causes a problem of increase in material cost. Further, the tab 31 is formed by punching out a metal plate by press working, but in order to improve the contact property of the tab 31, the structure of the blade portion 33 must have a complicated shape. In the case of the tab method, it is difficult to realize the shape due to the restriction of the mold, and it is the current situation that the conventional tab method cannot obtain satisfactory contact property. The present invention has been made in view of the above circumstances, and eliminates the need for pressure welding work using a dedicated pressure welding device, eliminates the need for an insulating wiring board for a bus bar, and provides a switch device and a switch with good contact properties. An object of the present invention is to provide a method of connecting an electric wire to a device to improve workability of connecting an electric wire, reduce material cost, and improve contact reliability.

[0007]

In order to achieve the above object, a switch device according to the present invention has a structure including a case and a circuit body to which an external electric wire is connected. A switch contact is formed on the circuit body, and a press-contact blade for press-contacting the electric wire is provided integrally with or separately from the circuit body, a cover is provided so as to be freely fitted into the case, and an electric wire holding portion for holding the electric wire is provided on the cover. As it forms
It is characterized in that an electric wire positioning portion for positioning the electric wire is formed on the cover at a position facing the press contact blade when the cover is fitted to the case and at a predetermined press-fitting depth into the press contact blade. is there. Then, the configuration of the switch device, the pressure contact blade is formed as a separate body from the circuit body, to form a pressure contact blade engagement portion of the circuit body is engaged with the pressure contact blade,
An electric contact surface may be formed on the press contact blade engaging portion, and the press contact blade may be electrically connected to the circuit body by engaging the press contact blade with the press contact blade engaging portion. Further, the wire connection method to the switch device according to the present invention is a wire connection method to the switch device for connecting an external wire and a circuit body provided in the case, wherein a pressure contact blade is provided on the circuit body. , A cover is provided on the case surface on the protruding side of the press contact blade so that the cover can be fitted freely, and an electric wire holding portion for holding the electric wire is provided on the cover, and the cover is opposed to the press contact blade when the cover is fitted on the case. Forming a wire positioning portion on the cover for positioning the wire at a predetermined press-fitting depth to the press contact blade, holding the wire in the wire holding portion, and then fitting the cover to the case Thus, the electric wire is pressed against the press contact blade to connect the electric wire to the circuit body.

In the switch device thus constructed,
The circuit body is provided with a press contact blade, the case is provided with the cover to be freely fitted, and the cover is provided with the electric wire positioning portion for positioning and holding the electric wire, and the electric wire holding portion. The electric wire held by the cover is pressed against the pressing blade. In addition, in the switch device in which the pressure contact blade is formed separately from the circuit body, the pressure contact blade can be manufactured as a single unit, increasing the degree of freedom in designing the pressure contact blade and selecting it in the required / unnecessary place according to the circuit body specifications. Retrofitting is possible. In addition, in the method of connecting the electric wire to the switch device, after the electric wire is held in the electric wire holding portion, the cover is fitted into the case so that the electric wire is pressed against the press contact blade, and the cover is used without using a dedicated press contact device. The electric wire is connected to the circuit body at the same time as the assembling.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a switch device and a wire connecting method to the switch device according to the present invention will be described in detail below with reference to the drawings. 1 is an exploded perspective view of a switch device according to the present invention, FIG. 2 is an enlarged perspective view of a case and a cover portion shown in FIG. 1, FIG. 3 is an enlarged perspective view of a press contact blade shown in FIG. 1, and FIG. FIG. 5 is an enlarged perspective view of the electric wire positioning portion shown in FIG. 5, and FIG. 5 is a cross-sectional view showing a press contact state between the press contact blade and the electric wire. A button holding base portion 43 is provided in the switch device 41, and a button portion 45 is swingably provided in the button holding base portion 43. A molded rubber plate 47 having rubber contacts (not shown) is provided below the button holding base portion 43 (downward in FIG. 1).

A case 49 made of a resin material is provided below the molded rubber plate 47, and the case 49 is integrally molded with a cover 51 also made of a resin material and a hinge portion 53 (see FIG. 2). When the cover 51 is rotated via the hinge portion 53, the cover 51 is fitted to the lower surface of the case 49 by a locking means (not shown).

As shown in FIG. 2, the case 4 of the cover 51
An electric wire holding portion 55 having a plurality of semicircular concave portions arranged side by side is formed on the inner surface on the 9 side, and the electric wire holding portion 55 holds an electric wire 57 fitted in the concave portion. The cover 51 is fitted to the case 49 with the electric wire 57 held by the electric wire holding portion 55.
A notch 59 is formed in the case 49, and the notch 59 guides the electric wire 57 from between the fitted cover 51 and the case 49.

A pressure contact blade 63 is integrally formed on the case 49 with a resin material. Further, a plating layer 65 formed by a method described later is formed on the surface of the case 49 on the rubber contact side.
The circuit body 61 is configured by. The circuit body 61 is provided with a switch contact 64 formed by depositing a plated layer 65 in a predetermined pattern shape, and the switch contact 64 is arranged to face the rubber contact.

The plating layer 65 is adhered to the case 49 to form the circuit body 61, and at the same time, the pressure contact blade 6 described above.
3 is also attached at the same time. Therefore, the pressure contact blade 63 becomes conductive by having the plating layer 65 adhered to the surface thereof, and is electrically connected to the circuit body 61 via the plating layer 65.

The pressure contact blade 63 is formed in a state of penetrating the pressure contact blade insertion opening 67 (see FIG. 4) formed in the case 49 with a gap, and the lower surface side of the case 49 (cover 51 side).
The tip of the blade portion 63a is projected. Since the press contact blade 63 is penetrated through the press contact blade insertion opening 67 with a gap, the plating layer 65 can be formed as a continuous surface across the front and back surfaces of the case 49 via the press contact blade insertion opening 67. .

An electric wire positioning portion 69 is formed on the cover 51, and the electric wire positioning portion 69 has a pair of support walls 69b in which a recess 69a is formed. The electric wire 57 has a recess 69.
By being fitted into a, it is positioned at a position facing the press contact blade 63 protruding from the lower surface side of the case 49 and at a height that allows press-fitting into the press contact blade 63 at a predetermined depth. Therefore, as shown in FIG. 4, when the cover 51 is fitted, the electric wire 57 positioned in the electric wire positioning portion 69 is press-fitted into the press-contact blade 63 protruding from the case 49 side, and the insulating coating 57a is torn. As a result, the conductor 57b is electrically connected to the blade portion 63a.

Further, the wire positioning portion 69 is formed with a blade accommodating portion 71 (see FIG. 5) between the pair of support walls 69b, and the blade accommodating portion 71 is pressed against the blade 51 when the cover 51 is fitted. The tip of 63 is accommodated. Therefore, since the tip of the press contact blade 63 is stored in the blade storage portion 71,
The electric wire 57 is press-fitted deep inside the blade portion 63a.

Here, a method of plating the circuit body 61 and the press contact blade 63 will be described. The circuit body 61 and the press contact blade 63 which are integrally formed with the case 49 are formed by so-called two-color molding that takes advantage of the characteristics of two kinds of resins. That is, in two-color molding, first, a catalyst for electroless plating (palladium, etc.)
A synthetic resin material (polyester sulfone or the like) containing is injection-molded to integrally form the circuit body 61 portion and the press contact blade 63. Then, a synthetic resin containing no catalyst is injection-molded to form the insulating portion 73 (see FIG. 2), and only the surfaces of the circuit body 61 and the press contact blade 63 are exposed.

The exposed circuit body 61 and the press contact blade 63 are roughened by a treatment liquid such as chromic acid to improve the adhesion of the plating layer 65. Next, the circuit body 61 and the press contact blades 63 are electrolessly plated with copper to complete the plating layer 65 that serves as an electrical conduction path. The circuit body 61 and the press contact blade 63 can be provided with a desired thickness by further plating the outside of the plating layer 65 with phosphor bronze or the like, and can be applied to a large current. Further, in particular, if a plating layer of tin is formed on the outside of the copper plating layer of the press contact blade 63, the rustproof property is enhanced and the contact property of the electric wire 57 with the conductor can be always maintained good.

The plating on the press contact blade 63 is performed by inserting the press contact blade 63 into the press contact blade insertion opening 67 with a gap as described above, so that the gap between the press contact blade 63 and the press contact blade insertion opening 67 is formed. Adhesion can be satisfactorily performed via the.

Next, a method of connecting electric wires to the switch device 41 having the above-mentioned structure will be described. In the switch device 41, in order to connect the electric wire 57, first, the predetermined electric wire 5
7 is held at a predetermined position on the wire holding portion 55. At this time, the pressure contact portion of the electric wire 57 is positioned at a position facing the pressure contact blade 63 by the electric wire positioning portion 69 provided near the electric wire holding portion 55. Next, the cover 51 holding the electric wire 57 is rotated toward the case 49, and the cover 51 is fitted to the lower surface of the case 49.

When the cover 51 is fitted into the case 49, the electric wire 57 is press-fitted into the press-contact blade 63 protruding from the lower surface of the case 49, and the insulating coating 57a of the electric wire 57 is cut, so that the conductor 57b is electrically connected to the blade portion 63a. Electrical continuity. Therefore, the electric wire 57 is electrically connected to the press contact blade 63, is electrically connected to the predetermined wiring pattern of the circuit body 61 through the plated layer 65, and completes the connection with the predetermined switch contact 64.

According to the above switch device 41, the case 4
9 is integrally formed with the press contact blade 63, the circuit layer 61 is formed in the case 49 by the plating layer 65, and the press contact blade 63 is adhered to the plating layer 65 to electrically connect the press contact blade 63 and the circuit body 61. Then, the case 49 and the cover 51 are integrally formed by the hinge portion 53, and the cover 51 has an electric wire positioning portion 69 for positioning and holding the electric wire 57 and an electric wire holding portion 55.
Since the electric wire 57 is provided, the electric wire 57 can be connected to the circuit body 61 only by fitting the cover 51 to the case 49.
Without using a dedicated pressure welding device for pressure welding 7,
The electric wire 57 can be connected to the switch device 41.

Further, since the circuit body 61 can be formed by the plated layer 65, an insulating wiring board is not required and the material cost can be reduced.

Further, since the press contact blade 63 is formed of a resin material, it is possible to form the blade portion shape in consideration of sufficient contactability which cannot be produced by the conventional press contact blade made of sheet metal. As the shape of the blade portion 63a in consideration of contactability, for example, a desired inclined surface 63b in the thickness direction of the blade portion 63a (see FIG.
(See) and the like.

Next, another embodiment of the switch device according to the present invention will be described with reference to FIG. 6A and 6B are explanatory views showing a procedure for manufacturing a press contact blade according to another embodiment of the switch device of the present invention, in which FIG.
Shows the state after the press contact blade joining, and (C) shows the state after the plating treatment. In the switch device according to this embodiment, only the circuit body 61 is integrally formed by the two-color molding described above. A recessed pressure contact blade engagement portion 82 is formed at an edge portion of the pressure contact blade insertion opening 67 of the case 49, and an engagement pin 83 integrally formed with the case 49 made of a resin material is formed in the pressure contact blade engagement portion 82. It is erected. A press contact blade 85 is provided so that it can be fitted into the press contact blade engaging portion 82, and a positioning hole 87 through which the engaging pin 83 penetrates is formed in the press contact blade 85. Therefore, the press contact blade 85 is fixed to the press contact blade engaging portion 82 by welding the tip of the engaging pin 83 inserted into the positioning hole 87. The pressure contact blade 85 can be fixed by welding the tip of the engagement pin 83 or by insert molding.

The pressure contact blade 85 is formed of a synthetic resin material (polyester sulfone or the like) containing a catalyst (palladium or the like) for electroless plating. Therefore, after the press contact blade 85 is fixed to the predetermined press contact blade engaging portion 82, the circuit body 61 and the press contact blade 85 are subjected to the same electroless plating as described above, so that the plating layer 65 serving as an electrical conduction path is formed. Will be completed. Further, the electrical connection between the press contact blade engagement portion 82 and the press contact blade 85 is
The plating layer 65, which is an electrical contact surface, is previously completed on the mutual contact surfaces of the press contact blade engaging portion 82 and the press contact blade 85, and the press contact blade engaging portion 82 and the press contact blade 85 are welded to each other by welding the engagement pin 83. It is also possible to achieve electrical conduction by fixing and bringing the plated layers 65 into contact with each other. In addition, other structures,
The cover 51, the electric wire holding portion 55, and the electric wire positioning portion 69 are formed similarly to the switch device 41 described above.

According to the switch device of another embodiment having such a structure, since the press contact blade 85 is formed as a separate body, the degree of freedom in designing the shape of the press contact blade 85 can be improved. Further, since the pressure contact blade 85 is retrofitted, it is possible to selectively retrofit the pressure contact blade 85 at a necessary / unnecessary place according to the specifications of the circuit body 61. Furthermore, it is possible to have pressure contact blades 85 of various sizes corresponding to a plurality of electric wire sizes and selectively attach the pressure contact blades 85 of a desired size according to the specifications of the circuit body 61. In the case where the pressure contact blade 85 is formed separately, only the pressure contact blade 85 can be previously subjected to electroless plating, and the adhesion of the plating can be improved.

In the above embodiment, the pressure contact blade 6 is used.
Although 3, 85 are integrally formed with the circuit body 61 or formed of a separate resin material, in the switch device according to the present invention, the press contact blade is formed of metal and is insert-molded into the circuit body 61, or as described above. It may be fixed through the engagement pin 83.

[0029]

As described above in detail, according to the switch device of the present invention, the circuit body is provided with the pressure contact blade, the case is provided with the cover so as to be fittable, and the electric wire is positioned and held on the cover. Since the positioning part and the wire holding part are provided,
The electric wire can be connected to the circuit body only by fitting the cover to the case, and the electric wire can be connected to the switch device without using a dedicated press-contacting device for press-connecting the electric wire. As a result, it is possible to drastically reduce the number of press-contacting work steps and equipment cost in assembling the switch device.
According to the switch device in which the pressure contact blade is formed separately from the circuit body, and the pressure contact blade engagement portion with which the pressure contact blade is engaged with the circuit body is formed, the degree of freedom in designing the shape of the pressure contact blade can be improved. In addition, it is possible to retrofit a pressure contact blade selectively to the required / unnecessary places according to the specifications of the circuit body.Furthermore, it has multiple sizes of pressure contact blades corresponding to multiple electric wire sizes. It is also possible to selectively attach a press-contact blade of a desired size according to the specifications of the above. Further, in the method of connecting the electric wire to the switch device, after the electric wire is held in the electric wire holding portion, the cover can be fitted into the case to press the electric wire to the press contact blade and connect the electric wire to the circuit body. It is possible to connect the wires at the same time as assembling the cover without using a pressure welding device, so that the work of connecting the wires can be performed extremely easily.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a switch device according to the present invention.

FIG. 2 is an enlarged perspective view of a case and a cover portion shown in FIG.

FIG. 3 is an enlarged perspective view of the press contact blade shown in FIG.

FIG. 4 is an enlarged perspective view of an electric wire positioning portion shown in FIG.

FIG. 5 is a cross-sectional view showing a pressure contact state between a pressure contact blade and an electric wire.

FIG. 6 is an explanatory view showing a procedure for manufacturing a press contact blade according to another embodiment of the switch device of the present invention.

FIG. 7 is a side view in which a part of a conventional switch device is cut away.

FIG. 8 is a plan view showing a bus bar formation surface of the circuit body.

9 is an enlarged perspective view of the tab shown in FIG.

[Explanation of symbols]

 41 switch device 49 case 51 cover 55 electric wire holding portion 57 electric wire 61 circuit body 63 pressure contact blade 64 switch contact 65 electric contact surface (plating layer) 69 electric wire positioning portion 82 pressure contact blade engaging portion

Claims (3)

[Claims] 1. A switch device comprising a case and a circuit body to which an external electric wire is connected, wherein a switch contact is formed in a part of the circuit body, and a press-contact blade for press-contacting the electric wire is integrated with the circuit body. Or provided separately,
A cover is provided so that it can be fitted in the case, and an electric wire holding portion for holding the electric wire is formed in the cover, and at a position facing the pressure contact blade when the cover is fitted in the case and to the pressure contact blade. An electric wire positioning portion for positioning the electric wire at a predetermined press-fitting depth is formed on the cover. 2. The pressure contact blade is formed separately from the circuit body, a pressure contact blade engagement portion with which the pressure contact blade is engaged is formed in the circuit body, and the pressure contact blade engagement portion has an electrical contact surface. 2. The pressure contact blade is electrically connected to the circuit body by forming the pressure contact blade engagement portion and engaging the pressure contact blade with the pressure contact blade engagement portion.
Switch device described. 3. A method of connecting an electric wire to a switch device for connecting an external electric wire and a circuit body provided inside the case, wherein the circuit body is provided with a pressure contact blade, and the case on the side where the pressure contact blade protrudes. A cover is provided so as to be fittable on the surface, an electric wire holding portion for holding the electric wire is provided on the cover, and a predetermined position for the press contact blade is provided at a position facing the press contact blade when the cover is fitted to the case. An electric wire positioning portion for positioning the electric wire at the press-fitting depth is formed on the cover, and after holding the electric wire in the electric wire holding portion, the cover is fitted to the case, so that the electric wire is attached to the press contact blade. A method of connecting an electric wire to a switch device, which comprises pressing the electric wire to connect the electric wire to the circuit body.