JPH0755840A - Cross coil-type measuring instrument and its manufacture - Google Patents

Abstract

PURPOSE:To easily attach a terminal and to enhance the productivity and the economical efficiency of the instrument by a method wherein the terminal is stamped in the combined structure of a lower housing and an upper housing and a connection part which connects the terminal is eliminated. CONSTITUTION:A moving magnet 23 is shaft-supported via a pointer shaft 25 at the inside of an internal space formed by combining a lower housing 21 with an upper housing 22. In addition, a plurality of cross coils 24 are wound on the outside of the lower housing 21 and the outer housing 22, connecting pins 26 are attached to ends of the coils 24, and a structure 35 is constituted. Then, terminals 27A, 278, 27C, 27D are stamped in the structure 35, the individual terminals are connected integrally by a connection part 36, and a stamped plate 28 formed by connecting an electric element across the terminals is positioned and fixed. Then, the connection part 36 which connects the individual terminals are cut and removed, and a desired electric circuit is constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-coil type instrument having a structure that enables automatic assembly and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a conventional cross-coil type instrument, there is one having a structure as shown in FIGS. 7, 8 and 9, for example. The cross-coil type instrument having the conventional structure will be described below.

Reference numeral 1 is a lower housing, 2 is an upper housing, and a movable magnet 4 having a pointer shaft 3 fixed in an internal space formed by a combination of the housings 1 and 2 has a pointer shaft. It is rotatably supported via 3. Further, a cross coil 5 is wound and held outside the housings 1 and 2 with the housings 1 and 2 as bobbins. 6 is a meter case, and the boss portion 7 formed on the meter case 6 has
The lower end portion of the terminal 8 is fastened by the mounting screw 9, and the lead portion 8- formed on the terminal 8
Reference numeral 1 denotes a pair of housings 1 and 2 which penetrates through a terminal insertion hole 10 formed in the axial direction, and a winding end of a crossing coil 5 is connected to a tip end of the penetration through a soldering 11. Is. At the lower end of the terminal 8, a claw portion 8-2 for positioning the terminal 8 in the lower housing 1 and an electric element 1 such as a resistor are provided.
A connecting portion 8-3 for connecting the two lead wires 13 and the terminal 8 is screwed to the meter case 6, and a screwing hole 8-4 for a mounting screw 9 serving as an external signal connecting portion is formed. Is. Reference numeral 14 denotes a magnetic shield case which is attached to the outside of the housings 1 and 2 to magnetically shield the cross coil 5 and the rotating body 4.

[0004]

However, in such a conventional cross-coil type instrument, a plurality of terminals 8 are fixed at predetermined positions of the housing, and the fixed terminals 8 are connected to leads of electric elements. It is difficult to automate the work such as soldering the wire 13, and on the conventional side, the terminal 8 has a structure in which the lead portion 8-1 for fixing the coil winding end and the electric element connecting portion 8-3 are integrated. In this structure, the housings 1 and 2 are positioned only in two pairs of columnar portions facing each other, and the electric element connecting portion 8-3 must be formed in the area of the thickness of the columnar portions. Therefore, the coil winding area cannot be effectively used, and therefore the forming shape of the lead wire 13 of the electric element 12 is complicated, and the electric element body and the lead connecting portion are considerably separated. Also becomes wiring for approaching the other electrical device connection unit, the production of lead forming the electric element were those difficult. Also, in handling, an external force is applied to the electric element, so that the lead wires are easily short-circuited, and further, when the instrument is downsized, it is difficult to form the electric element connecting portion 8-3 in terms of manufacturing. There was a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and particularly facilitates the assembly of a cross-coil type instrument by an automatic assembling machine, and the cross-coil type instrument. An object of the present invention is to provide a cross-coil type instrument and its manufacturing method capable of significantly improving the productivity and the economical efficiency of the instrument.

To further describe the present invention, a plurality of terminals having a predetermined shape are punched out so as not to be separated from each other, and an electric component is connected to each terminal of the terminal molded board, and the terminal molded board is connected. , Winding and mounting the connection pin connected to the coil end by inserting and holding the connection pin, and then soldering the connection pin to each terminal of the terminal molding board, According to the present invention, there is provided a cross-coil type instrument in which unnecessary portions are cut and each terminal is separated to form a predetermined electric connection circuit. It is possible to automatically assemble a cross-coil type instrument by omitting the work of forming and the work of forming the lead wire of the electric element.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS.

FIG. 1 is a plan view of a crossed coil type instrument according to this embodiment, FIG. 2 is a sectional view taken along the line AA, and FIG. 3 is a bottom view thereof. In these figures, 21 is an insulating material. The lower housing 22 formed is an upper housing, and a movable magnet (rotor) 2 is provided in an internal space formed by combining the two housings 21 and 22.
3 is rotatably supported by a pointer shaft 25. A plurality of crossing coils 24 are wound around the combined housings 21 and 22.

Reference numeral 26 is a connecting pin that penetrates both housings 21 and 22 in its axial direction.
Is connected to one end (upper end in FIG. 2) of the cross coil 24, and the other end (lower end in FIG. 2) of the connecting pin 26 is provided with screw terminals 27A and 27B clearly shown in FIG. , And intermediate terminal 27
C is connected. 27D also indicates a screw terminal.

The feature of the present invention lies in the structure of each of the terminals 27A, 27B, 27C and 27D and the mounting thereof. The mounting structure of these terminals will be described below.

In FIGS. 4, 5 and 6, reference numeral 27 is a terminal-formed substrate, and the terminal-formed substrate 27 is used as a raw material to be stamped into a pattern as shown in FIG. 4 to form the screw terminals 27A and 27B. , 27D and the intermediate terminal 27C are primarily formed by the punching plate 28 that is held by the connecting portion 36 so as not to be separated. These screw terminals 27A, 27B, and 27D have screw holes 29 for connecting an external signal line, and claws 30 for locking the housing.
And the connection end 31 is formed respectively. Also, the screw terminals 27A and 27B and the intermediate terminal 27C
Each of which has a connection end 32 for connecting the connection pin 26.
Are formed. Further, the intermediate terminal 27C has a plurality of locking claws 3 press-fitted into the lower housing 21.
3 is formed.

Each terminal 27A, 2 having such a shape
The punching plate 28 connecting the 7B, 27C and 27D is conveyed to the next step, and a predetermined electric element 34 which is a standard forming product is connected to a predetermined position of the punching plate 28 as shown in FIG. Next, the punched plate 28 is attached to the above-mentioned housing combination structure, that is, the lower housing 21, the upper housing 22, the movable magnet 23, as shown in FIG.
The screw hole 2 formed on the punched plate 28 is applied to the lower surface (side surface of the lower housing 21) of the combined structure 35 in which the cross coil 24, the connection pin 26 and the like are integrally assembled.
9 and the locking claws 30 are used to assemble (squeeze) the punched plate 28 on the lower surface of the combined structure 35 by an automatic assembling machine, and further, the end of the connection pin 26 provided in the combined structure 35. Section and terminals with screws 27A,
27B and the intermediate terminal 27C are connected by soldering to form an electrical connection circuit.

Then, this is supplied to a cutting machine, and unnecessary portions of the punching plate 28 connected to the assembly structure 35, that is, the terminals 27A, 27B, 27 are provided.
The connecting portion 36 that was connected so that C and 27D were not separated.
Cut each terminal 2 as shown in Fig. 3.
7A, 27B, 27C and 27D are independently coupled to the combined structure 35 to complete the cross coil type instrument.

As described above, according to this embodiment, the plurality of terminals 27A, 27B, 27C and 27D are connected to each other by the connecting portion 36.
After forming the punched plates 28 which are connected to each other via the punched plates 28 and assembled to the combined structure 35, the connecting portions 36 of the punched plates 28 are removed to separate the individual terminals 27A and 27B. , 27C, 27D, it becomes extremely easy to mount the terminal by an automatic assembly machine, which greatly improves productivity and economic efficiency.

Further, as the electric element 34 connected between the terminals of the punching plate 28, a standard forming product can be used, which facilitates the automatic assembly of the electric element 34 to the punching plate 28. This also enhances the productivity and economy of the cross coil type instrument.

Further, in this cross-coil type instrument structure, an electric circuit can be formed without using a printed circuit board, so that the printed circuit board and the studs are not required, and the economical efficiency is improved, and further, it is used in this embodiment. Since it is a punching member of the metal plate with each terminal, the heat dissipation is good, and therefore the heat generation of the soldering part in each terminal is suppressed, and the reliability of the connection is greatly improved.

[0017]

As described above, according to the present invention, the movable magnet 23 is rotatably supported via the pointer shaft 25 in the internal space formed by the combination of the lower housing 21 and the upper housing 22. Further, the lower housing 2
1. A plurality of crossing coils 24 are wound around the outer side of the upper housing 22 and the upper housing 22, and each of the terminals 27A, 27B, 27C and 27D is punched into a combined structure 35 in which a connecting pin 26 connected to the end of the crossing coil 24 is attached. , And the terminals are integrally connected by the connecting portion 36,
Further, a punching plate 28 formed by connecting electric elements to each other is positioned and fixed, and then the terminals and connecting pins and the like are connected, and then the connecting portion 36 connecting the respective terminals is removed by cutting. Since it is a cross-coil type instrument that constitutes an electric circuit and a manufacturing method thereof, according to this, a plurality of terminals 27A, 27B,
27C and 27D form a punching plate 28 connected and held to each other through a connecting portion 36, and after assembling this punching plate 28 to a combination structure 35, the connecting portion 36 of the punching plate 28 is removed. Each independent terminal 27A,
Since it is formed into 27B, 27C and 27D, it is extremely easy to attach the terminal by the automatic assembling machine, which greatly improves the productivity and the economical efficiency.

Further, as the electric element 34 connected between the terminals of the punching plate 28, a standard forming product can be used, which facilitates the automatic assembly of the electric element 34 to the punching plate 28. This also enhances the productivity and economy of the cross coil type instrument.

Further, in this cross-coil type instrument structure, an electric circuit can be formed without using a printed circuit board, so that the printed circuit board and the studs are not required and the economical efficiency is improved, and further, it is used in the present invention. Since it is a punched member of each terminal-equipped metal plate, it has good heat dissipation, so that the heat generation of the soldering part in each terminal is suppressed and the reliability of the connection is greatly improved.

[Brief description of drawings]

FIG. 1 is a plan view of a cross coil type instrument according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the cross coil type instrument according to the embodiment of the present invention.

FIG. 3 is a bottom view of the cross coil type instrument according to the embodiment of the present invention.

FIG. 4 is an explanatory plan view of a punching plate according to the embodiment of the present invention.

FIG. 5 is a perspective view of a punching plate according to an embodiment of the present invention.

FIG. 6 is an explanatory view in which an electric element is attached to the punching plate of the embodiment of the present invention.

FIG. 7 is a cross-sectional view of a conventional cross coil type instrument.

FIG. 8 is a perspective view of a terminal used in a conventional cross coil type instrument.

FIG. 9 is a plan view of a conventional cross coil type instrument.

[Explanation of symbols]

21 ... Lower housing 22 ... Upper housing 23 ... Movable magnet 24 ... Crossing coil 25 ... Pointer shaft 26 ... Connection pin 27 ... Terminal forming board 27A, 27B, 27C, 27D ... Terminal 28 ... Punching plate 29 ... Screw hole 30 ... Locking Claw 31 ... Connection end 32 ... Connection end 33 ... Locking claw 34 ... Electric element 35 ... Combination structure 36 ... Coupling part

Claims (2)

[Claims] 1. A movable magnet (23) is rotatably supported by a pointer shaft (25) in an internal space formed by a combination of a lower housing (21) and an upper housing (22), Furthermore, the lower housing (2
1) and a plurality of crossing coils (24) are wound around the outer housing (22), and connecting pins (26) connected to the ends of the crossing coils (24) are attached to a combination structure (35), respectively. Terminal (27A), (27
B), (27C) and (27D) are punched out, and the terminals are integrally connected by the connecting portion (36), and the punching plate (28) is formed by connecting the electric elements (34) between the terminals. A connecting part (36) for connecting the terminals after positioning and fixing to the combination structure (35) and then connecting the terminals and connecting pins.
A method for manufacturing a cross-coil type instrument, which comprises cutting and removing a desired electric circuit. 2. A movable magnet (23) is rotatably supported via a pointer shaft (25) in an internal space formed by a combination of a lower housing (21) and an upper housing (22), Furthermore, the lower housing (2
1) and a plurality of cross coils (24) wound on the outer side of the upper housing (22), and a connecting structure (35) having connection pins (26) connected to the ends of the cross coils (24), A plurality of terminals (27) fixed to the combination structure (35) and connected to the connection pins (26).
A), (27B), (27C), (27D) and an electric element (34) connected to these terminals, and the plurality of terminals (27A), (27B), (27).
C) and (27D) are obtained by positioning and fixing the punching plate (28) integrally connected by the connecting portion (36) to the combination structure (35) and then removing the connecting portion (36) by cutting. A cross coil type instrument characterized by being made.