JPH045015Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention is a movable terminal used when connecting external parts such as a resistor to a rod-shaped terminal inserted and held in the leg of a bobbin. Related to terminals for connecting external components in magnetic instruments.

(Prior Art) Generally, a movable magnet type instrument has a bobbin formed by an upper frame and a lower frame made of synthetic resin, a movable magnet is built into the bobbin, and the lower end of a pointer shaft inserted through the movable magnet is inserted into the bobbin. It is pivotally supported by the lower frame, the upper end protrudes from the upper frame, a pointer is attached to the tip, and a plurality of legs protruding diagonally from the periphery of the bobbin are used to connect external components such as power terminals and resistors. A rod-shaped terminal to be electrically connected is penetrated and held, a lead wire of a coil wound crosswise around the bobbin is wound around the rod-shaped terminal, and then fixed by soldering at the same time as the external parts, and the coil is A movable magnet is moved angularly by a synthetic magnetic field generated in response to a flowing current, and an indication is made with a pointer.

The rod-shaped terminal, as disclosed in, for example, Japanese Utility Model Publication No. 56-55655 and shown in FIG. 3, and a soldering section 7 for connecting and soldering a lead wire 4 of a coil and a lead wire 6 of an external component 5 such as a resistor.

(Problem to be solved by the invention) By the way, in general, most of the processes of movable magnet type instruments are automatically assembled, and in particular, after the coil is wound around the bobbin, the lead wire 4 is connected to the soldering part 7. It is automatically assembled by a machine until it is wrapped around.

However, when the lead wire 4 is soldered to the soldering part 7 together with the lead wire 6 of the external component 5 after the assembly, since the lead wire 6 of the external component 5 is relatively thick, it must be soldered in the same way as the lead wire 4. Because it is difficult to temporarily fix the lead wire 6 by winding it around the soldering part 7 or by mechanically holding the lead wire 6 in contact with the soldering part 7, the lead wire 6 and the lead wire 4 are attached to the soldering part 7 while holding the external part 5 manually. I had to solder it. Furthermore, although it is possible to temporarily fasten the external component 5 using a metal terminal having a through hole that can pass through the protrusion of the soldering part 7, it is possible that the solder adheres only to this metal terminal part and the soldering There is also the problem that it does not flow to the lead wire 4 below the portion 7, which tends to cause poor contact.

The present invention was developed based on the above-mentioned problems, and it is possible to temporarily fix external components such as power terminals and resistors without having to hold them manually, and the solder can be easily transferred to the entire soldered part and soldered reliably. The purpose of the present invention is to provide a terminal for connecting external components in a movable magnet type instrument.

[Structure of the idea]

(Means for Solving the Problems) The present invention forms a bobbin with an upper frame and a lower frame made of synthetic resin, and a plurality of legs protrude diagonally from the periphery of the bobbin. A movable magnet is built in, and the lower end of the pointer shaft inserted through the movable magnet is supported by the lower frame, the upper end is made to protrude from the upper frame, the pointer is attached to the tip, and external parts such as power terminals and resistors are attached. A rod-shaped terminal to be electrically connected and soldered to the rod-shaped terminal is inserted and held in the leg portion, a coil is wound crosswise around the bobbin, and a lead wire of this coil is wound around the rod-shaped terminal and connected by soldering. , in a movable magnet type instrument in which the movable magnet is angularly moved by the composite magnetic field of the coil, a protrusion constituting a soldering part is formed at the tip of the rod-shaped terminal, and a flat terminal is attached to the lead wire of the external component. At the same time, the terminal is provided with a fitting hole that can be fitted into the protrusion from above to temporarily secure an external component to the rod-shaped terminal, and the molten solder flows downward around the periphery of the fitting hole and the A cutout groove is formed that attaches to the protrusion and allows the terminal to be soldered.

(Function) When soldering, by fitting the projection on the tip of the rod-shaped terminal into the fitting hole of the terminal that has been connected to the external component in advance by a lead wire, the external component can be temporarily fixed without having to hold it manually. Moreover, the molten solder flows downward through the notch groove and is easily transmitted to the entire protrusion forming the soldering part, so that the external parts can be reliably soldered and fixed.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 to 4, reference numeral 11 is a synthetic resin bobbin divided into an upper frame 12 and a lower frame 13, and a movable magnet 15 is built into the bobbin 11 via a pointer shaft 14. The upper end protrudes from the upper end of the upper frame 12, a pointer 16 is fixed to the tip, and a coil 17 is wound around the bobbin 11 in a crossing manner. Also, bobbin 1
1 has a built-in movable magnet 15 and pivotally supports the lower end of the pointer shaft 14, and a rod-shaped terminal 19 for drawing and forming the lead wire 18 of the coil 17 to the outside is inserted and held on the diagonal of the periphery thereof. A plurality of leg portions 20 are formed. Further, an arm portion 22 for fixing a dial plate 21 is connected to the leg portion 20.

The rod-shaped terminal 19 is made of a conductive metal, and has a neck 24 having a smaller diameter than the body 23 connected to the upper part of the body 23 which is inserted and held in the leg 20.
4 is provided with a soldering portion 28 consisting of double flanges 25, 26 and a protrusion 27 that protrudes from the upper portions of the flanges 25, 26 and can be electrically connected to external components to be described later.

An external component 29 such as a power supply terminal or a resistor that is electrically connected to this protrusion 27 is a flat plate made of a metal piece with a fitting hole 31 in which the protrusion 27 is fitted at the end of the lead wire 30. A notch groove 33 is formed in the terminal 32 so that the fitting hole 31 communicates with the outside of the terminal 32. As shown in FIG. 4, this notch groove 33 is preferably formed at a position of about 45 degrees outward with respect to the direction in which the terminal 32 of the lead wire 30 is attached.

Note that 34 is a substantially cylindrical case made of a magnetic material that houses the bobbin 11 so as not to be affected by the earth's magnetism.

The present invention configured as described above has an upper frame 12 and a lower frame 13 that are divided into two parts.
The bobbin 11 is formed by assembling them together with a built-in movable magnet 15. 20, and wind the coil 17 crosswise around the bobbin 11.
The lead wire 18 is wound between the flanges 25 and 26 of the soldered portion 28. In addition, the soldering part 2
The external component 29 is temporarily fixed by fitting the fitting hole 31 of the terminal 32 attached to the external component 29 into the protrusion 27 of No. 8, but if necessary, other external components 29A
Similarly, in order to temporarily fix the terminals 32 and 32A to the protrusion 27, two terminals 32 and 32A may be fitted to one protrusion 27. Then, the lead wire 18 of the coil 17 provided at the soldering part 28 and the external parts 29, 2
The 9A terminals 32, 32A are soldered using an automatic soldering device, but the two terminals 32, 32A are soldered using an automatic soldering device.
In the protrusion 27 to which A is fitted, solder (not shown) is attached to the protrusion 27 from above the upper terminal 32A. Here, terminal 32
If A does not have the notch groove 33A, just fixing the upper terminal 32A and the protrusion 27 will prevent the lower terminal 32 from being obstructed by the upper terminal 32A.
Since the solder does not adhere to the terminal 32 on the lower side, the lower terminal 32 is not fixed to the protrusion 27 and there is a risk of poor contact. However, since the terminals 32, 32A of the present invention are formed with notch grooves 33, 33A that are located at approximately the same position when the terminals 32, 32A are fitted to the protrusion 27, the notch grooves 33, 33A are The melted solder flows downward along the notch groove 3.
Since the solder also adheres to the protrusion 27 partially exposed by the terminals 3 and 33A, the solder also adheres to the lower terminal 32 and is securely fixed to the protrusion 27 with solder. In this embodiment, since the flange 26 is provided at the lower end of the protrusion 27, the protrusion 27 and the soldering portion 28 are soldered separately. ,3
3A, the molten solder is also attached to the lead wire 18.

In this way, by fitting the fitting hole 31 of the flat terminal 32 to which the external component 29 is attached via the lead wire 30 from above into the protrusion 27 during soldering, the external component 29 can be manually attached. It becomes possible to temporarily fix the external component 29 to the rod-shaped terminal 19 without holding it, and it is possible to simplify the work process and improve work efficiency. In addition, since the notch groove 33 is formed in the terminal 32, when the external component 29 is temporarily fixed to the protrusion 27 and then soldered using an automatic soldering device, the melted solder will flow along the notch groove 33 and the protrusion 27 and the terminal. 32, and the protrusion 27 and the terminal 32 can be reliably fixed.
Moreover, one protrusion 27 has multiple terminals 3.
Even in the configuration in which terminals 2 and 32A are stacked, solder flows downward to the protrusion 27 through the notch grooves 33 and 33A of the terminals 32 and 32A, which are located at approximately the same position, and connects the protrusion 27 and each terminal 32 and 32A. It can be well penetrated between the parts and securely fixed.

When the movable magnet type instrument configured in this manner is used as a voltmeter in a vehicle, for example, the movable magnet 15 is moved angularly by a composite magnetic field generated in accordance with the current flowing in the coil in accordance with the voltage value installed in the vehicle. The pointer 16 displays information corresponding to the scale, numerical values, etc. on the dial 21 attached to the arm 22. In addition to voltmeters, movable magnet meters are also used as ammeters, thermometers, liquid level meters, etc.

Although one embodiment of the present invention has been described in detail above, it can be modified as appropriate within the scope of the gist of the present invention. For example, the notch groove 33 does not have to be formed at a 45 degree angle with respect to the mounting direction of the lead wire 30, but a plurality of terminals, for example two terminals 32, 32A, are arranged in a stacked manner on one protrusion 27. In the case of the configuration, the notch groove 33 of each terminal 32, 32A,
33A are preferably located at substantially the same position.

[Effect of idea]

As detailed above, according to the present invention, a bobbin is formed by an upper frame and a lower frame made of synthetic resin, a plurality of legs are provided diagonally protruding from the periphery of the bobbin, and a movable magnet is attached to the bobbin. The lower end of the pointer shaft inserted through this movable magnet is pivotally supported by the lower frame, the upper end is made to protrude from the upper frame, and the pointer is attached to the tip. A rod-shaped terminal to be connected and soldered is inserted and held in the leg portion, a coil is wound crosswise around the bobbin, a lead wire of this coil is wound around the rod-shaped terminal and connected by soldering, In a movable magnet type instrument in which the movable magnet is angularly moved by a composite magnetic field of a coil, a protrusion forming a soldering part is formed at the tip of the rod-shaped terminal, and a flat terminal is attached to the lead wire of the external component. At the same time, this terminal is provided with a fitting hole that can be fitted into the protrusion from above to temporarily secure an external component to the rod-shaped terminal, and the solder melted around the circumference of the fitting hole flows downward to the protrusion. It has a cutout groove that allows the terminal to be attached and soldered, allowing temporary attachment of external components such as power terminals and resistors without having to hold them manually, and ensuring that the solder spreads easily to the entire soldering area. It is possible to provide a terminal for connecting external components in a movable magnet type instrument that can be soldered to.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a front view of the instrument, and Figure 3 is A- in Figure 2.
4 is an enlarged front view of the main part, and FIG. 5 is a side view showing a conventional example. 11...Bobbin, 12...Upper frame, 13
... lower frame, 14 ... pointer shaft, 15 ... movable magnet, 17 ... coil, 18 ... lead wire,
19... Rod-shaped terminal, 20... Leg, 27... Protrusion, 29... External component, 30... Lead wire, 31
... Fitting hole, 32 ... Terminal, 33 ... Notch groove.

Claims (1)

[Scope of utility model registration request] A bobbin is formed by an upper frame and a lower frame made of synthetic resin, a plurality of legs are diagonally protruding from the periphery of the bobbin, a movable magnet is built into the bobbin, and a pointer is inserted through the movable magnet. The lower end of the shaft is pivotally supported by the lower frame, the upper end is made to protrude from the upper frame, a pointer is attached to the tip, and a rod-shaped terminal is electrically connected to and soldered to an external component such as a power supply terminal or a resistor. A coil is inserted through and held in the leg portion, wound around the bobbin in a crossing manner, and a lead wire of this coil is wound around the rod-shaped terminal and connected by soldering, and the movable magnet is angularly moved by the combined magnetic field of the coil. In a movable magnet type instrument,
A projection constituting a soldering part is formed at the tip of the rod-shaped terminal, a flat terminal is attached to the lead wire of the external component, and the external component is connected to the rod-shaped terminal by fitting into the projection from above. A movable device characterized in that the terminal is provided with a fitting hole that can be temporarily fixed, and a notch groove is formed around the fitting hole so that molten solder flows downward and adheres to the protrusion to enable the terminal to be soldered. Terminal for connecting external components in magnetic instruments.