JPS633070Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a magnetic proximity switch, and is particularly improved so that the connection between the reed switch and the terminal board is easy, and the wiring lead wire can be connected reliably and easily with the insulation covering still attached. This invention relates to a magnetic proximity switch.

Conventionally, the connection between this type of electrical component and the wiring lead wire was often done with screws, but when using this as a security switch etc., it was necessary to connect a large number of switches in a loop, so wiring at the site was difficult. The drawback was that it required a lot of man-hours. Furthermore, the terminals of the reed switch and the terminal board are often connected by soldering, which has the disadvantage of poor workability during assembly.

The present invention aims to improve these shortcomings and provide a magnetic proximity switch that can be easily connected to wiring lead wires, and furthermore, can easily connect reed switch terminals and terminal boards. Connecting the wiring connection piece and reed switch connection piece is possible by simply attaching the terminal board to the housing and press-fitting the wiring lead wire with insulation coating into the slit in the wiring connection piece. Furthermore, the reed switch terminal is characterized by having a structure in which the reed switch terminal can be brought into pressure contact with the reed switch connection piece by mounting the terminal plate on the housing. A detailed description will be given below with reference to the drawings.

Figures 1 to 3 are diagrams showing one embodiment of the magnetic proximity switch according to the present invention, with Figure 1 being a perspective view and Figure 2 being a cross-section viewed from below with wiring lead wires connected. 3 are sectional views similarly seen from the left side. In the figure, 1 is a housing, 2 is a housing bottom plate, and 3 is a pressing block, which are molded, for example, from thermoplastic plastic or the like. As shown in FIG. 5, the housing 1 includes a reed switch storage chamber 1a in which the reed switch 4 is housed, a deep groove 1b into which a reed switch connection piece 5b of a connection terminal board 5 (described later) is inserted, and a wiring connection piece 5a. A wiring connection piece chamber 1c in which the terminal board 5 is accommodated, a shallow terminal board groove 1d having a depth corresponding to the thickness of the connection terminal board 5, a wiring lead wire insertion hole 1e, and a mounting hole 1f are formed. As shown in FIG. 6, the bottom plate 2 has a guide block 2a that fits into the reed switch storage chamber 1a.
and a mounting hole 2b are formed, and the press block 3 is formed with a wiring connection piece chamber 3a in which the wiring connection piece 5a is accommodated, and a pressing convex portion 3b that comes into contact with and presses the wiring lead wire. As shown in FIG. 7, the bottom plate 2 and the pressing block 3 are integrally formed so that they can be repeatedly bent by 90 degrees at the V-groove 3', but they may be provided separately. Further, it is preferable that the dimensions are such that the guide block 2a and the pressing block 3 fit relatively tightly into the reed switch storage chamber 1a and the wiring connection piece chamber 1c, respectively.

5 and 5' are conductive connection terminal plates, and in the figure, 5 and 5' are formed with opposite left and right sides,
This may be formed symmetrically so that 5 and 5' are the same. As shown in FIG. 4, this terminal board 5 has a wiring connection piece 5a and a reed switch connection piece 5b integrally formed, and the wiring connection piece 5a is formed in a U-shape, with slits on both sides of the wiring connection piece 5a. 5c is provided. The width of this slit 5c is slightly narrower than the diameter of the core wire 6a of the wiring lead wire 6, and its tip is tapered and widened so that the wiring lead wire 6 can be easily received. It is preferable to form it into a slightly knife-edge shape so that it can easily penetrate into the insulation coating of the wire 6 and break through it. Further, the reed switch connecting piece 5b is also provided with a slit 5d.
The width d is formed to be slightly narrower than the diameter of the terminal 4a of the reed switch 4 so as to ensure continuity when the terminal 4a is press-fitted. In addition, the protrusion 5e
5f is a protrusion for preventing the pressing block from coming off and opening, and protrusion 5f is a protrusion for preventing the connecting terminal board from falling off.

Next, an explanation will be given of the assembly work of this embodiment constructed as described above and the wiring work at the site when it is used as a security switch or the like. First, the reed switch 4 is placed in the reed switch storage chamber 1a of the housing 1, and then the connection terminal plates 5, 5' are attached to the housing 1. When installing this, connect the connecting piece 5a
The connecting piece 5b is pressed and inserted into the deep groove 1b so that the connecting piece 5b fits in the connecting piece chamber 1c. As a result, the connecting piece 5b
contacts the terminal 4a of the reed switch 4, and when the terminal plate 5 is further pressed, the terminal 4a is press-fitted into the slit 5d, and the two are securely connected both electrically and mechanically by pressure contact. At this time, the protrusion 5
By engaging the side wall of the deep groove 1b, the terminal plate 5 is firmly engaged with the housing 1, and is prevented from falling off. Next, the guide block 2a is press-fitted into the reed switch storage chamber 1a, the bottom plate 2 is engaged with the housing 1, and the assembly is completed. When such a magnetic proximity switch is used as a security switch, screws or the like are passed through the mounting holes 1f and 2b, and the switch is fixed by screwing to a window frame or the like. Next, the wiring lead wire 6 is passed through the insertion hole 1e with the insulation coating still attached and placed on the tip of the slit 5c of the connecting piece 5a, and the pressing block 3 is placed at the V-groove 3' as shown in FIG. The lead wire 6 is pressed by the pressing convex portion 3b and press-fitted into the slit 5c by engaging it with the connecting piece chamber 1c while bending it, tightening it with pliers, etc., and tightening and pressing this pressing block against the housing. As a result, the connecting piece 5a sinks into the insulating coating of the lead wire 6, breaks it, comes into pressure contact with the core wire 6a, and the two are securely connected, completing the wiring. Note that wiring can be easily re-wired by opening the pressing block 3 and removing the lead wire 6 inserted into the slit 5c of the connecting piece 5a.

As explained above, in this embodiment, the connection between the wiring lead wire 6 and the terminal plates 5, 5' is made by applying the lead wire with the insulation coating on to the tip of the slit 5c of the connecting piece 5a. This can be done simply by pressing the pressing block 3. In addition, the connection between the reed switch 4 and the terminal boards 5, 5' can be made by connecting the terminal boards 5, 5' to the housing 1.
The terminal board can be attached to the housing simply by pressing the terminal boards 5, 5' onto the housing.

FIG. 8 shows another embodiment of the connection terminal board.
The connection terminal plate 7 shown in the figure is the terminal plate 5 shown in FIG.
Connect the reed switch 4 to the reed switch connection piece 5b.
A flexible tongue piece 7a is provided in contact with the pressing surface of the terminal 4a of the reed switch, thereby making the conduction between the reed switch and the terminal board more reliable.

As explained in detail above, in the magnetic proximity switch according to the present invention, the wiring connection piece and the reed switch connection piece are integrally formed, so the connection between the reed switch terminal and the terminal board can be easily made by simply press-fitting. In addition, it has the excellent feature that the wiring lead wire can be reliably connected by simply pressing the wiring lead wire with the insulation coating on with a pressure block, and it can be used, for example, as a security switch. When a large number of the present switches are connected in a loop and used, as in the case of the present invention, the wiring man-hour can be particularly reduced significantly, and the effect is especially remarkable.

[Brief explanation of the drawing]

1 to 7 are diagrams for explaining one embodiment of the present invention, and FIG. 1 is a perspective view of an assembled state;
Figure 2 is a sectional view of the wiring lead wires connected, viewed from the bottom, Figure 3 is a sectional view of the left side, Figure 4 is a perspective view of the connection terminal board, and Figure 5 is the housing. 6 is a perspective view of the bottom plate and the pressing block, and FIG. 7 is a sectional view illustrating the pressing block.
FIG. 8 is a perspective view showing another embodiment of the connection terminal board. 1... Housing, 1a... Reed switch storage room,
1b...Deep groove for reed switch connection piece, 1c...
Wiring connection single chamber, 1e...Wiring lead wire insertion hole,
2... Housing bottom plate, 2a... Guide block, 3...
Pressing block, 3b...Press convex portion, 4...Reed switch, 5, 5'...Connection terminal board, 5a...Wiring lead wire connection piece, 5b...Reed switch connection piece, 5c, 5d...Slit , 6... Lead wire for wiring, 7... Connection terminal plate, 7a... Flexible tongue piece, 8... Connection terminal plate, 8a... Recessed portion for soldering.

Claims (1)

[Scope of utility model registration request] It has a housing divided into two parts, a reed switch, and a reed switch connection piece with a slit formed at one end into which the terminal of the reed switch is press-fitted, and the other end has the insulation coating of the wiring lead wire inserted into the core wire. A pair of connection terminal plates each having a wiring connection piece formed with a slit for pressure contact, and a deep groove in which the connection terminal plate is held in one housing body and into which the reed switch connection piece is inserted, and a reed switch connection piece. A storage chamber is provided, and the other housing bottom plate is provided with a pressing block that presses the wiring lead wire placed in the slit of the wiring connection piece and press-fits it into the slit, and that fits into the reed switch storage chamber. A magnetic proximity switch characterized in that it is provided with a magnetic proximity switch.