JP2006351507A - Switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce thickness and simplify a structure by improving internal circuitry with respect to the structure of a switch device provided with a plurality of switch parts. <P>SOLUTION: A power supply wire, an earth wire and a wire connected with a load is housed in a lower part in a case, a bus bar layer comprising a positive side bus bar and a negative side bus bar connected with the power supply wire and the earth wire through terminals is housed in an upper part in the case and a plurality of operation switch parts changing power in forward and backward directions and supplying it to the load through the wire is provided on an arrangement side of the bus bar. The operation switch part is provided with a first contact swinging member contacting a contact of the bus bar on the positive side or negative side by swing, a second contact swinging member swinging with the first contact swinging member and contacting a contact of the bus bar on different side from the first contact swinging member, and a terminal part member wherein one end side is directly connected with a pair of wires connected with the load and the other end always contact the first or the second contact swinging member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a switch device, and more particularly to a switch device that switches power supply to a load such as a motor provided in each part of an automobile, and in particular, a motor disposed in each part of a power seat (electric seat) in a normal rotation direction. It is preferably used as a switch device that drives in the reverse direction.

  2. Description of the Related Art Conventionally, a power seat of an automobile is provided with a switch that connects a motor that drives a required portion of the seat, such as a reclining switch, a lifter switch, a slide switch, and a front tilt switch, to a power source. This switch is configured as shown in FIGS. FIG. 10 is a diagram showing an entire conventional switch device, and FIG. 11 is a sectional view of a switch circuit portion.

  The switch device 90 shown in FIGS. 10 and 11 includes, for example, a case 94 housing three layers of bus bars 91 to 93, a contact 95 formed on the uppermost bus bar 91, and a swing contact 96 that performs switching. I have. Since the bus bars 91 to 93 include portions that serve as flow paths for currents supplied from the switch circuits provided in the switch device 90 to the loads Ma to Md, the bus bars 91 to 93 must be multilayered. In this embodiment, there are three layers of bus bars 91-93.

  However, in order to manufacture the three-layer bus bars 91 to 93 used in the switch device 90, it is necessary to perform punching with a mold. When a plurality of types of bus bars 91 to 93 are used in combination, a plurality of bus bars 91 to 93 are used. Different types of molds are required. That is, there is a problem that the manufacturing cost of the switch device 90 is increased.

Further, the conventional switch device 90 uses a part of the bus bars 91 to 93 as the terminals 91 a to 93 a at the connection portion between the switch device 90 and each load, and connects these bus bars to the connector 97. In many cases, the wires connected to the loads Ma to Md are connected by connectors.
However, if the connector 97 connected to the bus bars 91 to 93 having a part of the terminals 91a to 93a is concentrated on one end portion of the switch device 90, the wires from the connector 97 to the loads Ma to Md are provided. There was a problem that caused unreasonable wiring. Therefore, although it is possible to provide a plurality of connectors 97 on the switch device 90 and provide a plurality of wire drawing positions, a new problem of increasing the manufacturing cost of the switch device 90 arises.

  Furthermore, if the three layers of bus bars 91 to 93 are insulated and held at an interval, the switch device 90 needs to be thick, which causes the switch device 90 to be enlarged.

Therefore, in Patent Document 1, a flexible flat cable (hereinafter referred to as FFC) is arranged on the output side so that the FFC becomes a part of the circuit of the switch circuit, and the FFC is directly wired from the switch circuit. A switch module has been provided that enables this.
JP 2000-57894 A

  However, FFC tends to have a wider width in the lateral direction than electric wires (discrete wires). For this reason, especially when a plurality of circuits are run in parallel, the width of the switch module having the FFC as a part of the circuit of the switch circuit has to be widened. Further, in the configuration described in Patent Document 1, the FFC is bent at the connection portion between the FFC and the switch circuit, and not only a large space is required at the connection portion between the FFC and the switch circuit. Since it is impossible, it is difficult to fix the switch circuit, and not only the operability of the switch operation is deteriorated but also a problem such as poor contact may occur.

  Furthermore, since FFC is more expensive than discrete wires, raising the manufacturing cost by wiring the FFC to each part of the electric sheet becomes a problem.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a switch device capable of simplifying the configuration to reduce the manufacturing cost and easily performing wiring in a narrow space.

In order to solve the above problems, the present invention accommodates a power line, a ground line, and an electric wire connected to a load in the lower part inside the case, and each of the power line and the ground line in the upper part inside the case. A plurality of bus bar layers composed of a plus side bus bar and a minus side bus bar connected through terminals are accommodated, and a plurality of bus bar layers are switched and supplied to the load via the electric wires on the arrangement side of the bus bar. Operation switch part is provided,
The operation switch unit swings in conjunction with the first swing contact and the first swing contact that comes into contact with the contact of the plus or minus bus bar by swinging, and the first switch A second swing contact that contacts the contact of the bus bar on the side different from the swing contact, and one end side is directly connected to the pair of electric wires connected to the load, and the other end is the first or second. And a terminal member that is always in contact with the swinging contactor.

  As described above, according to the present invention, the internal circuit of the switch device is not configured by a plurality of layers of bus bars, but the bus bar is provided as a single layer as a circuit material that contacts the swing contact of the operation switch unit. The electric wire connected to the wire and the load is directly taken in as an internal circuit of the switch device. In this way, the internal circuit of the switch device is constituted by the bus bar and the electric wire, so that only one bus bar which has conventionally been laminated in a plurality of layers is provided.

In particular,
The case consists of an upper case and a lower case,
While the lower case accommodates the power line, the ground line, and a group of wires connected to the load,
The upper case accommodates the one-layer bus bar and is provided with a plurality of the operation switch portions. The swing contact is attached to each of the operation switch portions as a substantially V shape, and the swing contact The terminal member is always in contact with the lower surface, the other end output side of the terminal member protrudes downward from the upper case, and the terminal member is connected to the electric wire in a state where the upper case and the lower case are assembled. Connected configuration.

The first and second oscillating contacts are interlocked by oscillating in the same direction by operation of one operating lever, and the first and second oscillating contacts are operated in the state where the operating member is operated. The lever is pressed against the contact on the plus or minus bus bar and the input contact on the terminal member.
Each of the first and second swinging contacts is substantially V-shaped and swings in the left-right direction with the lower end point as a fulcrum. The contact point of either the plus side or the minus side of the bus bar The terminal member is electrically connected. By adopting such a configuration, it is not possible to physically short-circuit the plus and minus bus bars, which is superior in terms of safety.

The power supply line and the ground line, and the plus side bus bar and the ground side bus bar are directly connected by pressure contact terminals (pressure contact tabs) formed on these bus bars and the terminal member connected to the load side electric wire. The pressure contact terminal material is preferably connected to the wire by a pressure contact blade formed on the lower end side of the pressure contact terminal material, and the upper end surface is always in contact with the swing contact.
As described above, it is not necessary to interpose the terminal member when the power supply line and the ground line are press-connected to the pressure contact tab formed on the bus bar, and the power supply line and the ground line can be directly drawn into the case and connected to the bus bar. it can.
Similarly, when the electric wires connected to the load are press-connected by the terminal member made of the press-contact terminal material, the electric wires can be directly drawn into the case without a connector.
Thus, the electric connection structure can be greatly simplified by directly drawing the electric wires connected to the power supply line, the ground line and the load into the case.
In addition, you may perform a connection of a bus bar, a power wire, and a ground wire via a terminal member. Further, the connection between the power supply line and the ground line and the bus bar and the connection between the load-side electric wire and the terminal member are not limited to the press-contact connection, and a crimp terminal portion may be provided for crimp connection, or the core wire of the electric wire may be exposed. It may be connected by soldering.

  The contact is preferably formed integrally with the bus bar. As a result, it is possible to reduce the manufacturing cost for forming the contact and to eliminate as much as possible the connection portion that may cause a contact failure.

  Further, in the switch device of the present invention, the load may be an electrical device disposed in each part of the vehicle, and may be a switch device for a required electrical device mounted on the vehicle. It is preferable to use it as a motor used for a sheet) and as a power seat switch.

As is clear from the above description, in the switch device of the present invention, the bus bar is a single-layer bus bar connected to the power line and the ground line, and the electric wire connected to the load is inserted into the case and used as an internal circuit. Therefore, the thickness of the switch device can be drastically reduced as compared with the conventional multi-layered structure using only the bus bar as the internal circuit.
In addition, as described above, the bus bar to be used may be only the plus side bus bar connected to the power supply line and the minus side bus bar connected to the ground line, and the bus bar to be connected to the load side is unnecessary. The manufacturing cost of the switch device can be reduced by minimizing the cost required for the punching and molding.
Furthermore, since the power line, the ground line, and the electric wire connected to the load are directly inserted into the switch case and are connectorless, the entire switch device can be reduced in size and simplified.

  Moreover, since the said terminal member which connects a bus-bar and an electric wire according to opening and closing of a switch has connected one end (output side terminal part) directly to the electric wire (discrete wire) connected to load, it is like usual. It is easier to wire the wires than when all the wires to the load are collected in one place and connected by a connector. That is, since there is no restriction on the wiring direction of the electric wire connected to the switch circuit, for example, the electric wire can be wired in different directions, and is particularly suitable for being arranged in a narrow portion. Further, since there is no connection portion by a connector in the wiring from the switch circuit to the load, the reliability is improved accordingly.

  Furthermore, since the bus bar, the swing contact and the terminal member can be easily formed by a thick conductor, the current capacity can be increased. In other words, the large current can be directly switched by the switch device, which is arranged in a circuit for flowing a large current. In addition, since the terminal member can have sufficient shape retention strength, it can be stably brought into contact with the swing contact, and not only has a good operation feeling of switch operation, but also has problems such as poor contact. Since it does not occur easily, it increases reliability.

  In the switch device of the present invention, a bus bar, first and second oscillating contacts, an upper case that accommodates a terminal member, and a lower case that accommodates an electric wire connected to a load are provided. By configuring the lower case to be openable and closable on the lower surface of the wire, it is possible to wire the wires with the lower case separated from the upper case, and by attaching the lower case to the upper case, the output side contact of the terminal member And the connection part of an electric wire can be stably hold | maintained.

Thus, since the switch device having a plurality of switch operation units can be reduced in size and thickness, the switch device is useful as a switch device arranged in a limited space in the automobile.
In particular, when the load is a motor used for a power seat, a portion where the switch device is arranged is a particularly limited space such as a side surface of the seat, and each motor is connected to the switch device. A configuration that can be connected in any direction is extremely useful.

Hereinafter, a switch device for an electric seat (hereinafter referred to as a power seat) mounted on an automobile according to an embodiment of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of the present invention, FIG. 1 is a perspective view showing the overall configuration of the switch device 1, FIG. 2 is an exploded view of the switch device 1, and FIG. FIG. 4 is a plan view showing the configuration of the switch circuit, FIG. 4 is a diagram for explaining wiring to the switch circuit, and FIG. 5 is a cross-sectional view.

The switch device 1 according to the present embodiment includes a power line V and a ground line G of a seat wire harness arranged in an electric seat, and load-side electric wires W1 and W2 connected to motors Ma to Md serving as loads. It consists of an 8-way type power seat switch interposed between the two.
The switch device 1 is arranged in an electric seat (not shown), and adjusts the reclining, lifter, slide, and front tilt of the power seat, respectively. Four motors Ma to Md (hereinafter referred to as a motor M if it is not necessary to distinguish them). ).

  The switch device 1 has two cases 2 (hereinafter referred to as an upper case 2a and a lower case 2b when distinction is necessary) that can be divided vertically.

  As shown in FIG. 3, the upper case 2 a functions as a switch operating member, and a positive bus bar 3 (power circuit) connected to a power line V from a power source such as a battery, and a minus connected to a ground line G. Bus bar 4 (ground circuit) on the side and four sets of switch circuits 5a to 5d (hereinafter referred to as power supplies) that connect these bus bars 3 and 4 to the motor M so as to switch the forward and reverse rotation directions of the motors Ma to Md. If there is no need to distinguish between them, it is called a switch circuit 5).

  The bus bars 3 and 4 are formed by punching a conductive metal plate into a required circuit, and press contact terminals (pressure contact) provided with press contact blades for press connection to the power supply line V and the ground line G below the appropriate positions. Tab) 3a, 4a is formed. Further, contacts 3b and 4b are integrally formed at appropriate positions on the bus bars 3 and 4 wired in the switch circuits 5a to 5d.

  As shown in FIG. 4, the power supply line V and the ground line G are wired to positions corresponding to the press contact blades 3a and 4a in the lower case 2b. In addition, electric wires W1a to W1d and W2a to W2d (hereinafter referred to as electric wires W1 and W2 when there is no need to distinguish them) to the motors Ma to Md are wired to positions corresponding to the switch circuits 5a to 5d, respectively. That is, the power line V, the ground line G, and the electric wires W1 and W2 connected to each motor are directly inserted and wired in the lower case 2b without a connector.

  Each of the electric wires G, V, W1a to W1d, W2a to W2d is a discrete wire, and is fixed by passing through a wiring guide B formed on the lower case 2b. Thus, in the switch apparatus 1 of this invention, each electric wire G, V, W1a-W1d, W2a-W2d is inserted in a case, and is used as a part of an internal circuit as it is.

  As shown in FIG. 5, the switch circuit 5 of the present embodiment includes a first swing contact 6 having a substantially V shape that contacts one of the bus bars 3 and 4 by swinging, and the first swing contact. A substantially V-shaped second oscillating contact 7 that is arranged side by side with the oscillating contact 6 and oscillates in conjunction with the first oscillating contact 6, and these oscillating contacts 6, 7 are always provided. A pair of terminal members 8 and 9 that are in contact with each other and an operation member 10 that causes the swinging contactors 6 and 7 to simultaneously swing in the same direction when operated by a user.

  As shown in FIG. 3, the pair of swing contacts 6 and 7 are in contact with a contact 3b (hereinafter referred to as a power supply circuit contact 3b) provided on the plus side bus bar 3 by the first swing contact 6. The second oscillating contact 7 is brought into contact with a contact 4b (hereinafter referred to as an earth circuit contact 4b) provided on the negative bus bar 4 and oscillated in the opposite direction. In the state, the contacts 3b and 4b are arranged so that the first swing contact 6 is in contact with the earth circuit contact 4b and the second swing contact 7 is in contact with the power circuit contact 3b.

  The terminal members 8 and 9 are made of a press-contact terminal material formed of a conductive metal material, and the shape thereof is connected to the core wires of the electric wires W1 and W2 at the lower end (one end side) as shown in FIG. The output side contacts 8a and 9a are formed of pressure contact blades, and the input side contacts 8b and 9b are formed at the upper end (the other end) to contact the swinging contacts 6 and 7, respectively.

  Therefore, the connection between the terminal members 8 and 9 and the electric wires W1 and W2 is facilitated by pressure contact when the lower case 2b in which the electric wires G, V, W1a to W1d and W2a to W2d are wired is attached to the lower surface of the upper case 2a. Can be done. The output contacts 8b and 9b may be connected to the electric wires by soldering.

  The operation member 10 is configured to press the swinging contacts 6 and 7 downward by the operation. When the operation member is operated, the swinging contacts 6 and 7 are connected to the bus bar 3 or the bus bar 4. The contact resistance can be reduced by pressing against the heads of the terminal members 8 and 9.

In the switch device of the present invention, the switch circuit 5 has three states. When the operation member 10 is not operated, the swinging contacts 6 and 7 contact only the terminal members 8 and 9, respectively. No current flows through the electric wires W1, W2.
When the operating member 10 is operated to bring the oscillating contacts 6, 7 into contact with the contacts 3b, 4b, the contacts 3b, 4b are connected to the terminal members 8, 9 by the oscillating contacts 6, 7, so that the electric wire W1. , W2 can pass a forward current to rotate the motor M in the forward direction.
Further, when the operation member 10 is operated in reverse, a current in the reverse direction can be passed through the motor M to rotate the motor M in the reverse direction.

  In the switch device 1 having the above-described configuration, each of the members 3, 4, 6 to 9 through which a current flows can have a sufficient thickness, and the contact resistance at each contact can be reduced. 5 can directly switch a circuit through which a large current flows.

  Moreover, since the wiring direction of the electric wires W1 and W2 with respect to each switch circuit 5 is inserted in the switch device without a connector, it can be freely changed. Therefore, it is useful as a switch device 1 for switching and controlling the rotation of the motor M arranged in each part of the electric seat, particularly in a narrow automobile.

6 to 9 show a second embodiment of the present invention.
In the present embodiment, the connection structure between the power line V and the bus bar 3, the ground line G and the bus bar 4, and the connection structure between the terminal members 8 'and 9' and the electric wires W1 and W2 are different from those in the first embodiment.

As shown in FIG. 6, the connection between the power line V and the ground line G and the bus bars 3 and 4 is made by bending the female crimp terminal 20 connected to the terminals of the power line V and the ground line G and the ends of the bus bars 3 and 4. The male tabs 3c and 4c provided are connected by male and female connection.
The female crimp terminal 20 connected to the terminals of the power supply line V and the ground line G is bent at a substantially right angle between a crimp section 20a formed of a barrel provided at one end and a female terminal section 20b provided at the other end. A crimping part 20a that is crimped to the terminals of the power supply line V and the grounding line G is molded in the lower case 2b and arranged horizontally, while the female terminal part 20b extends upward and is provided at the upper end. The opening is used as an insertion port for the male tabs 3c, 4c of the bus bars 3, 4.
On the other hand, the bus bars 3 and 4 are provided with male tabs 3c and 4c by refracting the tip of a required portion downward, and the male tabs 3c and 4c are provided on the lower surface side of the upper case 2a through the through holes H provided in the upper case 2a. Protruding.

  As in the first embodiment, when the upper case 2a and the lower case 2b are assembled, the male tabs 3c, 4c of the bus bars 3, 4 are connected to the female terminal portion 20b of the female crimp terminal 20 connected to the terminals of the power line V and the ground line G. Is inserted and the male and female are fitted and connected, and the power line V and the bus bar 3, the ground line G and the bus bar 4 are connected.

In this embodiment, as shown in FIG. 7, the terminal members 8 ′ and 9 ′ are crimped and connected to the electric wires W1 and W2. As shown in FIGS. 8 and 9, the terminal member 8 ′ 9 ′ includes a crimping portion 8 a ′, 9 a ′ (input side contact) formed of a barrel provided at one end and male tabs 8 c ′, 9 c ′ provided at the other end. L-shaped male terminals bent at substantially right angles between them. With the terminal members 8 'and 9' crimped to the ends of the electric wires W1 and W2, the crimping portions 8a 'and 9a' are molded in the lower case 2b and horizontally arranged, while the male tabs 8c 'and 9c' are placed in the lower case. The upper ends of the male tabs 8c ′ and 9c ′ are input side contacts 8b ′ and 9b ′ that contact the swinging contacts 6 and 7, respectively.
In addition, when the axial direction of the electric wires W1 and W2 to be connected using the terminal members 8 ′ and 9 ′ and the length direction of the swinging contactors 6 and 7 match, the male tabs 8c ′, as shown in FIG. Terminal members 8 ′ and 9 ′ are used in which the width direction of 9c ′ and the axial direction of the electric wires W1 and W2 are orthogonal to each other. On the other hand, as shown in FIG. 7, when the axial direction of the wires W1 and W2 and the length direction of the swinging contacts 6 and 7 are orthogonal, the width direction of the male tabs 8c ′ and 9c ′ as shown in FIG. And terminal members 8 ′ and 9 ′ in which the axial directions of the electric wires W1 and W2 coincide.

As described above, when the upper case 2a and the lower case 2b are assembled, the input side contacts 8b ′ and 9b ′ at the upper ends of the male tabs 8c ′ and 9c ′ of the terminal members 8 ′ and 9 ′ connected to the terminals of the electric wires W1 and W2 are assembled. Contacts the lower surfaces of the swinging contacts 6 and 7, and the electric wires W1 and W2 are connected to the swinging contacts 6 and 7 through the terminal members 8 'and 9'.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

It is a figure which shows the example of a connection of the switch apparatus and load which concern on the Example of this invention. It is a figure which decomposes | disassembles and shows a part of said switch apparatus. It is a figure which shows the structure of the switch circuit in the said switch apparatus. It is a figure which shows the example of wiring of the electric wire in the said switch apparatus. It is a longitudinal cross-sectional view which shows the structure of the said switch circuit. It is sectional drawing which shows the connection structure of the power wire of 2nd Embodiment of this invention, a ground wire, and a bus bar. It is a longitudinal cross-sectional view which shows the structure of the switch circuit of 2nd Embodiment. The crimp terminal connected to the electric wire is shown, (A) is a perspective view, (B) is a side view, and (C) is a front view. The other crimp terminal connected to the electric wire is shown, (A) is a perspective view, (B) is a side view, and (C) is a front view. It is a figure which shows the example of a connection of the conventional switch apparatus and load. It is a longitudinal cross-sectional view which shows the structure in the conventional switch apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch apparatus 3 Positive side bus bar 4 Negative side bus bar 3a, 4a Pressure contact terminal (pressure contact tab)
5 switch circuit 6 first swing contact 7 second swing contact 8, 9 terminal member 8a, 9a output side contact 8b, 9b input side contact Ma to Md load W1, W2 pair of electric wires V power supply line G ground wire

Claims (5)

A power bus, a ground wire, and an electric wire connected to a load are housed in the lower part inside the case, and a plus-side bus bar connected to the power source line and the ground wire through terminals respectively in the upper part inside the case A bus bar layer composed of a minus side bus bar is accommodated in one layer, and a plurality of operation switch portions are provided on the arrangement side of the bus bar to supply power to the load by switching to the load via the electric wire,
The operation switch unit swings in conjunction with the first swing contact and the first swing contact that comes into contact with the contact of the plus or minus bus bar by swinging, and the first switch A second swing contact that contacts the contact of the bus bar on the side different from the swing contact, and one end side is directly connected to the pair of electric wires connected to the load, and the other end is the first or second. And a terminal member that is always in contact with the swinging contactor. The case consists of an upper case and a lower case,
While the lower case accommodates the power line, the ground line, and a group of wires connected to the load,
The upper case accommodates the one-layer bus bar and is provided with a plurality of the operation switch portions. The swing contact is attached to each of the operation switch portions as a substantially V shape, and the swing contact The terminal member is always in contact with the lower surface, the other end output side of the terminal member protrudes downward from the upper case, and the terminal member is connected to the electric wire in a state where the upper case and the lower case are assembled. The switch device according to claim 1 connected.   The said terminal member consists of a male terminal which provided the tab in the upper part, and while making the said tab always contact the lower surface of the said rocking contact, the lower part is connected to the said electric wire by press-contact or crimping | compression-bonding. 2. The switch device according to 2.   The switch device according to any one of claims 1 to 3, wherein the load is an electrical device arranged in each part of the automobile.   The switch device according to any one of claims 1 to 3, wherein the load is a motor used for an electric seat of an automobile and constitutes a power seat switch.

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