WO2014192593A1 - Electric measuring device and manufacturing method thereof - Google Patents

Abstract

Provided are an electric measuring device and a manufacturing method thereof which enable electrically connecting the circuit substrate and the terminals of a measuring instrument main body without soldering and which enable reducing of the number of manufacturing steps. This electric measuring device is provided with: a circuit substrate (14) which positions a stepping motor (11) and is provided with pass-through terminal areas (14b) which pass completely through said substrate and have a conductive portion for electrical connection with the stepping motor (11); a case member (12) of the electric component (11), provided with retaining and fixing units formed passing through the extension line of the pass-through terminal areas (14b); and a connection terminal member (15) which is press-fitted into the pass-through terminal areas (14b) of the circuit substrate (14) from the retaining and fixing units and which comprises insertion crimping parts (15c) inserted into the pass-through terminal areas (14b) and crimped in the conductive portion to form an electrical connection between the stepping motor (11) and the circuit substrate (14), fixing holding units (15b) inserted into and fixed in the retaining and fixing units to fix the stepping motor (11) to the circuit substrate (14), and main body connecting units (15a) connected in a conductive state with the stepping motor (11).

Description

Electric instrument device and method for manufacturing the same

The present invention relates to an electric instrument device and a manufacturing method thereof.

Electric instrument devices are used in various fields such as OA equipment, home appliances, and automobiles. For example, as an electric instrument device used in automobiles, a vehicle speed meter that indicates vehicle speed and an engine speed are indicated. There are various meters (instrument devices) such as an engine speed meter, a fuel remaining amount meter that indicates the fuel remaining amount, and a water temperature meter that indicates the temperature of the cooling water.
The electrical instrument device is configured by attaching an electrical component to a circuit board and electrically connecting a terminal provided on the electrical component and the circuit board.

For example, in a pointer driving device for driving a pointer of an electric instrument device, electrical connection between a terminal of a stepping motor constituting an electrical component and a circuit board is disclosed in, for example, Patent Document 1 Soldering is done.
A stepping motor bobbin that constitutes an electrical component is provided with a terminal that conducts with the coil, this terminal is extended toward the circuit board, and the extension end penetrates the circuit board and is soldered directly on the back side. Connecting.

Japanese Patent Laid-Open No. 9-149619

However, the electrical component described in Patent Document 1 requires a terminal soldering process for electrical connection separately from the process of attaching to the circuit board. Therefore, there is a problem that it becomes complicated.
Moreover, if the terminals of the electrical components are soldered to the circuit board, there is a problem that the electrical components cannot be easily removed and it is difficult to replace the parts.
On the other hand, in order to eliminate the need for soldering, a protrusion is formed on the inner periphery of the hole of the through terminal portion of the circuit board, or a female terminal having a protrusion formed on the inner periphery of the cylindrical portion is provided on the back side of the circuit board. By inserting the extended end of the terminal of the electrical component from the front side of the circuit board, it is conceivable to make electrical connection through the hole of the through terminal part or the protrusion part of the female terminal, but it protrudes to the inner periphery of the hole There is a problem that the manufacturing process becomes complicated and the number of parts is increased.

The present invention has been made in view of the above-described situation, and can electrically connect terminals of an electrical component and a circuit board without soldering, and can reduce the number of manufacturing steps. An object of the present invention is to provide an instrument device and a manufacturing method thereof.

In order to achieve the above object, an electrical instrument device according to the present invention comprises:
An electrical instrument device in which an electrical component is attached to a circuit board, and the electrical component and the circuit board are electrically connected,
Positioning and fixing the electrical component, the circuit board including a through terminal portion penetrating through an energization portion that can be electrically connected to the electrical component;
The electrical component comprising a retaining fixing portion formed so as to penetrate on an extension line of the penetrating terminal portion; and
An insertion crimping portion that is inserted into the through-terminal portion and is crimped to the current-carrying portion to electrically connect the electrical component and the circuit board; and an electrical component that is secured by being inserted into the retaining fixing portion. A connection terminal having a fixed holding portion for fixing to the circuit board and a main body connection portion connected to the electrical component in a conductive state, and capable of being press-fitted from the retaining fixing portion to the through terminal portion of the circuit board. With members,
It is characterized by that.

In order to achieve the above object, a method of manufacturing an electric instrument device according to the present invention includes:
A method of manufacturing an electrical instrument device for attaching an electrical component to a circuit board and electrically connecting the electrical component and the circuit board,
The circuit board includes a penetrating through terminal portion having a current-carrying portion that can electrically connect the electrical component while positioning and fixing the electrical component,
The electrical component includes a retaining fixing portion penetrating on an extension line of the penetrating terminal portion,
The connection terminal member can be inserted into the through-terminal portion of the circuit board from the retainer fixing portion, and is inserted into the through-terminal portion and crimped to the energizing portion to electrically connect the electrical component and the circuit board. An insertion crimping portion to be connected to each other, a fixing holding portion fixed to the retaining fixing portion, and a main body connecting portion connected to the electrical component in a conductive state,
In the positioning and fixing state in which the electrical component is locked to the circuit board, the connection terminal member is fixed to the electrical component until the insertion crimping portion of the connection terminal member is not crimped to the through terminal portion. A terminal insertion step to be inserted into the part;
A component positioning step for locking the electrical component to the circuit board and making it in a fixed positioning state;
And a terminal press-fitting step of press-fitting the connection terminal member to fix the fixing holding part to the retaining fixing part and crimping the insertion crimping part to the penetrating terminal part.

According to the electrical instrument device and the manufacturing method thereof according to the present invention, it is possible to electrically connect the electrical component to the circuit board without the need for soldering, and the number of processes can be reduced.

It is sectional drawing of the electric instrument apparatus which concerns on one Embodiment of this invention. FIG. 4 is an external perspective view of a connection terminal member and a cross-sectional view of a press-fitted state according to an embodiment of the present invention. It is process drawing of the manufacturing method of the electrical meter apparatus which concerns on one Embodiment of this invention.

Hereinafter, an electrical instrument device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
An electric instrument device 1 according to this embodiment includes, for example, a vehicle speed meter for instructing a vehicle speed of a vehicle such as an automobile, an engine speed meter for instructing an engine speed, a fuel remaining amount meter for instructing a fuel remaining amount, a cooling It is configured as various meters (electrical instrument device) such as a water temperature meter that indicates the temperature of water. For example, a stepping motor (electrical component) that is a pointer driving device is attached to a circuit board, and a coil of the stepping motor The connection terminal member connected in the conductive state to the circuit board and the circuit board are electrically connected without the need for soldering.

As shown in FIG. 1, a stepping motor 11 that constitutes an electrical component of the electric meter device 1 includes a case member 12 and a drive member 13 housed in the case member 12. 11 is attached to the circuit board 14 via the case member 12 in this embodiment.

The case member 12 includes at least a synthetic resin case 12a and a metal shield case 12b which are divided into two parts. In the case 12a of the case member 12, a disk-shaped plastic magnet that is rotatable via a rotor shaft constituting the drive member 13 of the stepping motor 11 is housed, and the rotation of the rotor shaft is transmitted to the pointer shaft 13a. The reduction gear is housed and the pointer shaft 13a is rotationally driven. A pair of coils 13b is wound around the outside of the case 12a, and a predetermined region of the case 12a around which the coil 13b is wound is stored so as to be covered with a metal shield case 12b. The other components constituting the are also housed in the case 12a and the shield case 12b.

In order to attach the stepping motor 11 to the circuit board 14, a positioning claw 12c for positioning and fixing is formed on the case 12a constituting the case member 12 in which the stepping motor 11 is accommodated so as to protrude forward (circuit board 14 side). The stepping motor 11 is positioned at a predetermined position on the circuit board 14 by the locking claws 12c provided at a plurality of places, for example, three places. .

Further, the electric instrument device 1 has a connection terminal member 15 made of a conductive material, for example, a metal material, separated from the stepping motor 11, and the terminal portions of the pair of coils 13 b are connected to the connection terminals, respectively. The base 15 of the member 15 is tangled and soldered to the main body connecting portion 15a and connected in a conductive state, and is inserted into the retaining fixing portion 12d formed on the case member 12 of the stepping motor 11 so as to fix and hold the intermediate portion. The part 15b can be fixed. This stepping motor 11 has four connection terminal members 15.
In order to electrically connect these connection terminal members 15 to the circuit board 14, the circuit board 14 is formed with a through terminal portion 14 b constituted by a through hole, and is positioned at a predetermined position on the circuit board 14. It arrange | positions corresponding to the position of the connection terminal member 15 of the stepping motor 11, and the inside surface is made into the electricity supply part which consists of a through-hole part by a copper foil pattern, and becomes a connection surface connected in a conductive state.
An insertion crimping portion 15c is formed at the tip of the connection terminal member 15 that is electrically connected by being inserted into the through terminal portion 14b of the circuit board 14 and crimping.

This connection terminal member 15 is formed by press-molding a rod-like conductive metal material, and the main body connection portion 15a to be soldered by winding the distal end portion of the coil 13b at the base end portion has a substantially prismatic shape. . A fixing holding portion 15b, which is an intermediate portion of the connection terminal member 15 fixed to the retaining fixing portion 12d of the case member 12, is formed with a protrusion from the side surface of the main body connecting portion 15a and is pressed into a cross-sectional shape. The circle inscribed at the tip of the cross-shaped portion has a large diameter, and the outer shape of this portion is the largest.
The insertion crimping portion 15c at the tip of the connection terminal member 15 that is press-fitted into and electrically connected to the through terminal portion 14b of the circuit board 14 is press-molded so as to swell in an arc shape on both outer sides, and a through hole is formed in the center portion. It is formed so that a pressure-bonding force due to elastic deformation can be secured.
The maximum width L2 of the outer shape of the fixed holding portion 15b of the connection terminal member 15 is formed larger than the largest width portion L1 of the insertion crimping portion 15c that swells in an arc shape. The insertion crimping portion 15 c at the tip can smoothly pass through the retaining fixing portion 12 d of the case member 12, and the connection terminal member 15 is prevented from coming out of the through terminal portion 14 b of the circuit board 14.

In order to attach such a connection terminal member 15 to the stepping motor 11 in advance, a terminal insertion hole 12e is provided in the shield case 12b, and the terminal is disposed by corresponding to the position of the retaining fixing portion 12d of the case member 12. The connection terminal member 15 can be inserted from the insertion hole 12 e to the retaining fixing portion 12 d of the case member 12 and the through terminal portion 14 b of the circuit board 14. The terminal insertion hole 12e is sized so as not to be short-circuited with the connection terminal member 15.

In the initial assembly state of the connection terminal member 15 to the stepping motor 11 (terminal insertion step A), the stepping motor 11 is positioned and fixed by locking the locking claw 12c of the case member 12 to the locking hole 14a of the circuit board 14. In the state, the tip of the connecting terminal member 15 to be connected is located at the through terminal portion 14b of the circuit board 14, but the insertion crimping portion 15c to be electrically connected is assembled and set so as not to be crimped. The stepping motor 11 is set on the press-fitting jig 20.
Subsequently, after positioning and fixing the stepping motor 11 to the circuit board 14 (main body positioning process B), the connection terminal member 15 is further press-fitted (terminal press-fitting process C), so that the insertion crimping part 15c at the distal end is connected to the circuit board. 14 can be inserted into and crimped to the through terminal portion 14b to complete the electrical connection, and the connection terminal member 15 has the largest fixing holding portion 15b positioned at the retaining fixing portion 12d of the case member 12. It can be firmly fixed and held. Alternatively, the insertion and crimping portion 15c at the tip of the connecting terminal member 15 instead of soldering can be inserted into the through terminal portion 14b of the circuit board 14 and crimped to be firmly fixed.

Next, a method for manufacturing such an electric instrument device 1 will be described according to the steps shown in FIG.
First, as the terminal insertion step A, the initial assembly state of the connection terminal member 15 to the stepping motor 11 is determined by fixing the positioning of the stepping motor 11 in which the locking claw 12c of the case member 12 is locked to the locking hole 14a of the circuit board 14. In the state, the tip of the connecting terminal member 15 to be connected is located at the through terminal portion 14b of the circuit board 14, but the insertion crimping portion 15c to be electrically connected is in the middle of the connecting terminal member 15 to a position where it is not crimped. The fixed holding portion 15b is assembled and set in a state where it is pushed into the retaining fixing portion 12d of the case member 12.
The stepping motor 11 assembled and set in the terminal insertion step A is set in the press-fitting jig 20 facing the circuit board 14, and the locking hole 14a of the circuit board 14 and the locking claw 12c of the case member 12 are aligned. While facing, the penetration terminal part 14b of the circuit board 14 and the connection terminal member 15 are made to oppose on a straight line.

Thereafter, a body positioning step B is performed, and the press-fitting jig 20 is raised (closed to the circuit board 14) to lock the locking claw 12c of the case member 12 into the locking hole 14a of the circuit board 14 to thereby step the motor. 11 is a fixed positioning state.
In this state, the tip of the connecting terminal member 15 to be connected is located at the through terminal portion 14b of the circuit board 14, but the insertion crimping portion 15c to be electrically connected is not crimped.

Finally, a terminal press-fitting step C for electrically connecting the connection terminal member 15 to the circuit board 14 is performed.
By pressing the press-fitting pin 21 of the press-fitting jig 20, the intermediate holding part 15 b of the connection terminal member 15 is pushed into the retaining fixing part 12 d of the case member 12, and the insertion crimping part at the tip of the connection terminal member 15 is inserted. 15c is inserted into the through-terminal portion 14b of the circuit board 14 and crimped to be electrically connected.
In this state, the fixed holding portion 15b of the intermediate portion of the connection terminal member 15 is held in a state of being fixed to the retaining fixing portion 12d of the case member 12 constituting the apparatus main body, and the connection terminal member 15 instead of soldering. By inserting and crimping the insertion crimping portion 15c at the tip end of the insertion crimping portion 15b into the through terminal portion 14b of the circuit board 14, the state is firmly fixed.

In the terminal press-fitting step C following the body positioning step B, a step of managing the press input by setting the power checker 22 on the press-fit pin 21 and measuring the press input is added. It is measured and checked that it is electrically connected to the through terminal portion 14b of the circuit board 14 with a predetermined pressure input. The pressure input management by the power checker 22 is preferably performed for all the connection terminal members 15, but measurement management is performed for at least one connection terminal member 15.
When a predetermined pressure input cannot be obtained, the connection terminal member 15 is replaced or the stepping motor 11 is replaced.

According to such an electric instrument device and the manufacturing method thereof, the connection crimping part 15c is connected to the circuit board 14 via the case member 12 without using the connection terminal member 15 separately from the stepping motor 11, and the circuit is formed. It can be inserted into the through terminal portion 14b of the substrate 14 and crimped to be electrically connected, and after being attached to the circuit substrate 14 via the case member 12 so far, the man-hours are required as compared with the case where a soldering process is required. Can be reduced, and electrical connection can also be made during a series of mounting operations.
Thereby, it is possible to easily remove the stepping motor 11 from the circuit board 14 and to perform component replacement more easily than in the case of soldering.
Further, by pressing the insertion crimping portion 15c of the connection terminal member 15 without performing special processing on the through-terminal portion 14b of the circuit board 14, the outer side of the hole in the central portion is expanded to ensure the crimping force. Can be manufactured easily.
Further, by providing a process for managing the pressure input and measuring the pressure input by the power checker 22, it is possible to easily manage the electrical connection state and the mounting strength of the stepping motor 11, and firmly fix the circuit board 14 to the circuit board 14. Can be held.

In the above-described embodiment, the connecting terminal member is formed in a prismatic material, and the insertion crimping portion in which both sides of the central hole are inflated outward in an arc shape is formed at the tip, and a cross-shaped portion is formed in the middle portion. The case where the fixed holding portion is formed has been described as an example. However, other shapes such as a triangular prism shape, a polygonal column shape, or a cylindrical shape may be used. The insertion crimping portion may be a wedge shape or the shape of the fixed holding portion may be sufficient. In addition to the four-shaped projecting pieces, other shapes such as three or more projecting pieces may be used.
Furthermore, the main body connection portion of the connection terminal member is not limited to being provided at the base end portion, and may be at any other position as long as it does not hinder insertion. In order to facilitate this, one or more plating layers may be provided.

Further, although the stepping motor has been described as an example of the electric component of the electric instrument device, it can be similarly applied to other electric components, and the circuit board can be electrically connected via a case member in which the electric component is stored. Connection and fixing and holding can be performed without soldering using a connection terminal member.

In addition, although the electrical component is fixed to the circuit board with the locking claw and the locking hole, the electrical component is held by some means and the electrical component is directly fixed to the circuit board with the connection terminal member. Anyway.

Since the main body connection portion 15a on the lower end side of the connection terminal member 15 is set without protruding from the bottom surface of the case member 12 to the outside, contact with external parts can be prevented, and the connection terminal member 15 can be prevented. Can be protected.

The present invention is suitable for an electric instrument device and a manufacturing method thereof.

1 Electric instrument 11 Stepping motor (Electric parts)
12 Case member 12a Case 12b Shield case 12c Locking claw 12d Locking fixing part 12e Terminal insertion hole 13 Driving member 13a Pointer shaft 13b Coil 14 Circuit board 14a Locking hole 14b Through terminal part 15 Connection terminal member 15a Main body connection part 15b Fixing Holding part 15c Insertion crimping part 20 Crimping jig 21 Press-fit pin 22 Power checker A Terminal insertion process B Body positioning process C Terminal press-fit process L1 Maximum width L2 of insertion crimping part Maximum width of fixed holding part

Claims (6)

An electrical instrument device in which an electrical component is attached to a circuit board, and the electrical component and the circuit board are electrically connected,
Positioning and fixing the electrical component, the circuit board including a through terminal portion penetrating through an energization portion that can be electrically connected to the electrical component;
The electrical component comprising a retaining fixing portion formed so as to penetrate on an extension line of the penetrating terminal portion; and
An insertion crimping portion that is inserted into the through-terminal portion and is crimped to the current-carrying portion to electrically connect the electrical component and the circuit board; and an electrical component that is secured by being inserted into the retaining fixing portion. A connection terminal having a fixed holding portion fixed to the circuit board and a conductive connection portion connected to the electrical component in a conductive state, and capable of being press-fitted from the retaining fixing portion to the through terminal portion of the circuit board. With members,
An electrical instrument device. The retainer fixing part is formed to have a larger diameter than the through terminal part.
The electrical instrument device according to claim 1. The retainer fixing portion of the electrical component is formed on a case member in which the electrical component is housed and fixed.
The electric instrument device according to claim 1 or 2, wherein A method of manufacturing an electrical instrument device for attaching an electrical component to a circuit board and electrically connecting the electrical component and the circuit board,
The circuit board includes a penetrating through terminal portion having a current-carrying portion that can electrically connect the electrical component while positioning and fixing the electrical component,
The electrical component includes a retaining fixing portion penetrating on an extension line of the penetrating terminal portion,
The connection terminal member can be inserted into the through-terminal portion of the circuit board from the retainer fixing portion, and is inserted into the through-terminal portion and crimped to the energizing portion to electrically connect the electrical component and the circuit board. An insertion crimping portion to be connected to each other, a fixing holding portion fixed to the retaining fixing portion, and a main body connecting portion connected to the electrical component in a conductive state,
In the positioning and fixing state in which the electrical component is locked to the circuit board, the connection terminal member is fixed to the electrical component until the insertion crimping portion of the connection terminal member is not crimped to the through terminal portion. A terminal insertion step to be inserted into the part;
A component positioning step for locking the electrical component to the circuit board and making it in a fixed positioning state;
And a terminal press-fitting step of press-fitting the connection terminal member to fix the fixing holding part to the retaining fixing part and crimping the insertion crimping part to the penetrating terminal part. A method of manufacturing an instrument device. The terminal press-fitting step includes a pressure input management step for managing the pressure input of the connection terminal member.
The manufacturing method of the electrical instrument apparatus of Claim 4 characterized by the above-mentioned. The pressure input management step includes managing the pressure input of each of the connection terminal members.
The method of manufacturing an electrical instrument device according to claim 5.

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