JPH11242950A - Terminal connecting device for power supply circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal connecting device for a power supply circuit that does not cause a continuity failure and can maintain the self-supporting and the locking of a connecting member even if external force is applied to a power supply connecting part, and allows the thickness of a connecting member assembly to be thin in thickness and small in size. SOLUTION: A connecting lead member 4 mounted to a board 1 having a circuit pattern layer has a bridge part mounted on the surface of the board 1, a generally ring-shaped loop part 5 having a predetermined outside diameter and formed at the middle part of the bridge part, and a linear mounting terminal part that is extended from the bridge part by being bent into a hook-shaped form. The linear mounting terminal part is inserted into a hole formed at a corresponding position in the board 1 and is connected and fixed to the circuit pattern layer 2 of the board 1 by means of soldering, and the ring-shaped loop part 5 is projected in a direction generally perpendicular to the bridge, is inserted into a slot 3 formed at a corresponding position in the board 1 and is locked and retained, and the thickness of a completely assembled part of a terminal connecting device can be made thin in thickness and small in size, and the ring-shaped loop part, 5 is elastically locked by the slot 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection device, and more particularly to a terminal connection device for a power supply circuit used for supplying power to an electronic device or the like.

[0002]

2. Description of the Related Art In recent years, in a connection device for a power supply circuit used for electronic equipment and the like, the work of inserting and soldering a connection member such as a lead wire into a printed circuit board has been automated. Bulletin and Japanese Utility Model Application
A terminal connection configuration has been devised as disclosed in Japanese Unexamined Patent Publication (Kokai) No. 2000-254, and further, in Japanese Patent No. 2658586. Hereinafter, a conventional power supply circuit connection device will be briefly described with reference to FIGS.

FIG. 8 shows a battery terminal connecting device disclosed in Japanese Utility Model Laid-Open Publication No. 1-60366. In FIG. 8, a coil-shaped electrode terminal portion 4A is provided at one end of a lead wire, and an intermediate bridge portion 4C is provided. A linear attachment end 4B is provided on the other end side with the leg portion 4D having a spiral structure interposed therebetween.

[0004]

However, in this conventional terminal connection configuration, the bridge leg 4D of the connection member to be brought into contact with the wiring board has a helical structure, thereby preventing the bridge portion from falling down and soldering. Although the attachment is easy, the connection member is inserted in the hole of the wiring board at one position of the end 4B in a free state before soldering, so that the connection member is not laid down. The effect, the self-sustaining effect, was small. Further, the external force applied to the bridge portion directly acts on the soldering portion of the helical winding portion, which causes a problem that a solder crack is generated and a conduction failure is likely to occur. Furthermore, since the helical winding is brought into contact with the wiring board and soldered, the thickness becomes large, which is not suitable for thin electronic devices.

FIG. 9 shows a lead terminal structure disclosed in Japanese Utility Model Laid-Open No. 2-110180. In FIG. 9, a substantially U-shaped loop portion 5 having a diameter D formed at an intermediate portion of a lead wire 4 is insulated. It is inserted and locked in a slot 3 having a length L formed on a substrate 1 and is connected and fixed to a circuit pattern 2 formed around the slot by solder 7.

However, in the above-described conventional terminal connection structure, although the loop portion of the metal lead wire is inserted into the hole of the insulating substrate and is elastically engaged therewith, the inserted portion has a loop (substantially U-shaped) shape. Because there is only one place, the independence effect is small,
There has been a problem that it is easily detached from the insulating substrate, the metal wire, or the vibration applied to the lead terminals.

FIG. 10 shows a lead terminal connection structure disclosed in Japanese Patent Publication No. 2658586. In FIG. 10, a straight terminal portion 4B bent in a hook shape is provided at one end of a lead wire 4 and the other end is provided. And a substantially U-shaped loop terminal portion 5 having a diameter D is provided at an intermediate portion thereof, and the U-shaped loop terminal portion 5 has a length L slot formed in the insulating substrate 1. 3, the linear terminal portion 4B is inserted and locked into a hole 6 formed in the insulating substrate 1 by a solder 7A, and connected and fixed to a circuit pattern formed around the slot by a solder 7A. It is connected and fixed to the circuit pattern of the section.

However, in the conventional terminal connection configuration for forming a U-shaped loop terminal portion as shown in FIGS. 9 and 10, the minimum radius R of the loop shape is generally a metal radius in the production by a coiling machine. Since it is necessary to be at least three times the wire diameter d of the wire, it has been difficult to reduce the height (outer diameter) of the loop portion. Therefore, the height H of the loop portion protrudes more than three times the diameter of the metal wire from the thickness of the insulating substrate, and the thickness of the finished insulating substrate on which the connecting device is mounted is increased. Was unsuitable.

The present invention solves such a conventional problem,
Even when an external force is applied to the power connection, such as when a battery power source such as a dry battery is connected to the power supply circuit connection device, the external force does not act on the soldered portion and can maintain a good conduction state. It is an object of the present invention to provide a power supply circuit connecting device that can maintain the self-supporting and locking of a connecting member even when they are not connected by soldering, and can reduce the thickness of the connecting member assembly to a small size.

[0010]

In order to solve the above-mentioned problems, a terminal connection device for a power supply circuit according to the present invention has a connection lead member mounted on a substrate having a circuit pattern layer. A bridge portion mounted on the surface of the substrate, a substantially ring-shaped loop portion having a predetermined outside diameter formed at an intermediate portion of the bridge portion, and a linear mounting terminal portion bent and extended from the bridge portion into a hook shape Is formed, the linear mounting terminal portion is inserted into a hole formed at a corresponding position in the substrate, connected and fixed to a circuit pattern layer of the substrate by soldering, and the ring-shaped loop portion is connected to the bridge portion. And is inserted into a slot formed at a corresponding position in the substrate and locked and held.

According to the present invention, the thickness of the connecting member can be made small and small by the above-described structure, and the linear mounting terminal portion and the ring-shaped loop portion of the connecting member are inserted into the corresponding holes and slots of the board, respectively. The ring-shaped loop portion is elastically engaged with the slot.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal connection device for a power supply circuit according to a first aspect of the present invention has a connection lead member having a substantially constant wire diameter mounted on a substrate having a circuit pattern layer, and the connection lead member is A bridge portion mounted on the surface of the substrate, a substantially ring-shaped loop portion having a predetermined outer diameter formed at an intermediate portion of the bridge portion, and a linear mounting terminal extending from the bridge portion in a hook shape. Portion is formed, the linear mounting terminal portion is inserted into a hole formed at a corresponding position in the substrate,
Connected and fixed to the circuit pattern layer of the board by soldering,
The ring-shaped loop portion protrudes in a direction substantially orthogonal to the bridge portion, and is inserted into a slot formed at a corresponding position in the substrate and locked and held.

According to a second aspect of the present invention, the connecting lead member is bent at a predetermined angle at an intermediate portion thereof, and
And a second bridge portion, the first and second bridge portions respectively forming first and second ring-shaped loop portions, and the first and second ring-shaped loop portions are formed in the substrate. This is a configuration in which first and second slots formed at corresponding predetermined locations are respectively inserted and held.

According to the first aspect of the present invention, the assembled terminal part of the terminal connection device in which the lead connection member is mounted on the base is:
The thickness can be made much thinner as compared with the related art, the locking of the lead wire loop portion in the slot is performed more reliably and stably, and the configuration is optimal for a thin electronic device.

According to the second aspect of the present invention, even if a crack occurs at the solder joint of the loop portion due to an external force applied to the power supply terminal portion, the external force does not affect the solder joint of the terminal mounting portion. A good conduction state can be maintained at low cost. Furthermore, since the connection lead member is fixed to the board at two locations, even when the connection member and the printed board are not soldered and joined to each other, the connection member can be reliably maintained independently and locked, and workability can be improved. Can be improved.

Hereinafter, a terminal connection device for a power supply circuit according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, in the drawings, the same reference numerals are given to the same member elements as in the conventional example.

(Embodiment 1) FIG. 1 shows an appearance of a main part of a power supply circuit terminal connection device before assembly according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an insulating substrate for a printed circuit, and 4 denotes a lead wire connecting member having a substantially constant wire diameter mounted on the circuit board 1. The connection lead member 4 has a linear bridge portion 4C, and a ring-shaped loop portion 5 having a single-turn spin-shaped winding structure is formed at an intermediate portion thereof. Further, a coil spring-shaped terminal portion 4A as a power supply terminal portion is provided on one end side, and a linear insertion mounting terminal portion 4B is formed on the other end side, and extends downward from the hook-shaped bent portion 4D in the figure. It is mounted on an insulating substrate.

A DC power source (not shown) such as a battery is connected to the coil spring terminal portion 4A, and the power is supplied to the circuit pattern layer of the substrate via the linear mounting terminal portion 4B of the lead member and the ring-shaped loop portion 5. You.

In the above configuration, the mounting terminal portion 4B extends in a direction substantially perpendicular to the bridge portion 4C, and is inserted into a hole 6 formed at a corresponding predetermined position in the substrate 1. The diameter of the hole 6 is formed slightly larger than the diameter of the lead wire 4.

The ring-shaped loop portion 5 protrudes in a direction substantially perpendicular to the bridge portion 4C, and is inserted and fixedly held in a slot 3 formed at a corresponding predetermined position in the substrate 1. The length L of the slot 3 is substantially equal to or slightly smaller than the outer diameter D of the ring-shaped loop portion 5, and the outermost diameter portion of the ring-shaped loop portion is formed by the spring tension of the ring-shaped loop portion. And the inner wall 3a can be elastically engaged with the slot 3 in the longitudinal direction, so that the connection member and the printed circuit board can be maintained independently and locked without soldering and connecting each other. . On the other hand, the width W of the slot 3
When the ring-shaped loop portion 5 has a single-turn structure, the ring-shaped loop portion 5 is formed to be slightly larger than the wire diameter d of the lead member 4 to securely insert and hold the ring-shaped loop portion 5 in the width direction of the slot.

In this embodiment, the lead wire 4 actually used has a wire diameter d of, for example, 0.5 mm, 0.55 mm, 1.
0 mm, while the thickness S of the substrate 1 is, for example, 1.0 m
m, 1.2 mm and 1.6 mm are used. However,
These numerical values are merely examples, and it goes without saying that other numerical values can also be used.

FIGS. 2 and 3 show a sectional view of a main part of the assembled structure of the terminal connecting device shown in FIG. In this embodiment, in this embodiment, the inner wall 3 a of the slot 3 is
For example, the ring-shaped loop portion 5 formed so as to be substantially perpendicular to a (or 1b) and held in the slot 3 is made of a solder foil (not shown) provided on the back surface 1b of the substrate by the solder 7A. It is connected and fixed to the circuit pattern layer 2 around the slot through the slot.

On the other hand, the mounting terminal portion 4B inserted into the hole 6 in the board is similarly connected and fixed to the circuit pattern layer 2 of the board via the solder foil by the solder 7B. In the actual component assembling and manufacturing process, the process of inserting the connection lead member 4 into the board and the process of soldering can be automated.

As described above, in this embodiment, the ring-shaped loop portion is securely locked in the slot 3 of the substrate, and the occurrence of solder cracks is effectively prevented while maintaining the self-supporting effect of the connecting member. I have.

In this embodiment, the circuit pattern layer 2 is described as being provided on the back side of the substrate. However, the circuit pattern layer may be provided also on the top side of the substrate. Needless to say, there is.

In this embodiment, since the ring-shaped loop portion 5 has a spin-shaped winding configuration, the outer diameter D of the loop portion 5 can be reduced to approximately five times the wire diameter d of the lead wire 4. it can. That is, when the loop portion 5 is formed using a coiling machine, the loop portion 5 can be formed if the required minimum radius R is about 2.5 times the lead wire diameter d. Therefore, the height H of the projecting portion of the loop portion from the lower surface of the substrate is:
It can be made much smaller than the conventional configuration.

In an experiment for manufacturing the terminal connection device, the inventor of the present application has found that the outer diameter D of the lead wire loop portion 5 is smaller than the outer diameter D of the lead wire loop portion 5 with respect to the necessary minimum height H of the projecting portion from the lower surface of the substrate. It has been found that the height H of the protrusion can be reduced to a value substantially equal to the lead wire diameter d on the assumption that the diameter is at least five times the diameter d. That is, if the value of the height H of the loop protrusion is at least equal to or greater than the lead wire diameter d, the loop 5 can be securely locked in the slot 3. In the thinnest configuration, the portion corresponding to the inner diameter of the loop portion 5 is held in the slot 3 of the substrate, and only the upper end portion 5a and the lower end portion 5b of the lead wire loop portion are respectively shown on the upper surface 1a of the substrate in the drawing. And protrudes outward from the lower surface 1b, and the following expression holds for the thickness S of the substrate. D = S + 2d (D ≥ 5d, H = d)

In the present embodiment, the spin winding of the loop portion 5 has a single winding configuration, but the number of windings is not limited to one. Is also possible. In this multiple winding configuration, slot 3
Is determined according to the number of turns of the winding, and the loop portion 5
Can be more reliably and stably mounted in the slot 3, and can prevent the lead loop portion from being inclined or bent unnecessarily, and can prevent erroneous insertion of the loop portion into the slot, thereby improving workability.

In the present embodiment, the bridge portion 4C of the lead member 4 disposed on the substrate is linear, but the bridge portion may have a bent portion.

As a further modification, as shown in FIG. 3, in order to more securely and stably hold the ring-shaped loop portion 5 in the slot 3, the inner wall 3a of the slot 3 is not perpendicular to the base surface. That is, the slot can be formed in a slightly tapered shape so that the cross-sectional shape of the slot becomes trapezoidal, and the length L of the slot can be changed depending on its depth position. That is, the length L of the slot is minimum (Lmin) at the upper end position (substrate surface 1a), increases as the depth position of the slot goes downward, and becomes maximum at the lower end position (substrate lower surface 1b). (Lmax). Here, the minimum length (Lmin) at the upper end position is formed to be slightly smaller than the outer diameter D of the lead loop portion 5 by a predetermined value, and the loop portion mounted in the slot is securely locked and held. I have.

In the above configuration, by making the maximum length Lmax at the lower end position of the slot substantially equal to the outer diameter D of the loop portion 5, the loop portion inserted and held in the slot can be
Without providing the solder 7A, it can be mechanically tightly fixed to the circuit pattern layer 2 on the back surface of the substrate.

As described above, in the first embodiment, the assembled parts of the terminal connection device in which the lead connection member is mounted on the base can be made much thinner as compared with the conventional one, and the lead loop portion can be formed. Is more reliably and stably performed in the slot, and the configuration is optimal for a thin electronic device.

In this embodiment, even if a crack occurs in the solder joint 7A of the loop due to an external force applied to the power supply terminal 4A, the external force does not affect the solder joint 7B of the terminal mounting part 4B. A good conduction state can be maintained at a low price without any effect. Furthermore, since the connection lead member is fixed to the board at two locations, even when the connection member and the printed board are not soldered and joined to each other, the connection member can be reliably maintained independently and locked, and workability can be improved. Can be improved.

(Embodiment 2) FIG. 4 shows an external appearance of a main part of a power supply circuit terminal connecting device according to a second embodiment of the present invention before assembly. As shown in the figure, a feature of the present embodiment different from the first embodiment is that the connection lead member 4 has first and second linear bridge portions 4C and 4C ', and the first and second linear bridge portions 4C' and 4C ', respectively. Are formed in the ring-shaped loop portions 5 and 5 ′.

In FIG. 4, the connecting lead member 4 is bent at an intermediate portion 4E thereof, for example, at a predetermined angle substantially equal to a right angle to form first and second linear bridge portions 4C and 4C.
C 'extend in a direction substantially perpendicular to each other. Therefore,
The first and second ring-shaped loop portions 5 and 5 'are configured so that their axes are substantially orthogonal to each other. The first and second ring-shaped loop portions 5 and 5 ′ are formed so as to protrude substantially perpendicularly to the first and second bridge portions 4C and 4C ′, respectively, and are formed at corresponding predetermined locations in the substrate 1. First formed
And inserted and fixedly held in the second slots 3 and 3 ', respectively.

One of the first and second ring-shaped loop portions 5 and 5 'inserted and held in the first and second slots 3 and 3' is soldered to a circuit board. The linear mounting terminal portion 4B extends in a direction substantially perpendicular to the second bridge portion 4C ', is inserted into a hole 6 formed at a corresponding predetermined position in the board 1, and is soldered to the circuit board. This is the same as in the first embodiment.

FIG. 5 shows a sectional view of a main part in an assembled state of the power supply circuit terminal connection device as seen from the direction of arrow A in FIG. 4, and FIG. 6 shows the connection for power supply circuit as seen from the direction of arrow B in FIG. 2 shows a cross-sectional shape of a main part in an assembled state of the device. As shown in both figures, the configuration of this embodiment is the same as that of the first embodiment shown in FIG.
Since the configuration is substantially the same as that of the embodiment described above, detailed description of overlapping portions will be omitted for the sake of brevity. Now, the first ring-shaped loop portion 5 inserted and held in the first slot 3 closer to the coil-shaped power supply terminal portion 4A side is inserted and held in the second slot 3 'without soldering to the circuit board. The case where only the second ring-shaped loop portion 5 'is joined to the circuit board with the solder 7A will be described.

When an external force is applied to the coil-shaped power supply terminal portion 4A by mounting a power source such as a battery, the external force acts on the first ring-shaped loop portion 5 which is not soldered, and the first slot 3 Absorbed. As a result, the external force is applied to the solder 7A of the second ring-shaped loop portion 5 '.
Has no effect, and a good conduction state is maintained.

Also in this embodiment, as in the first embodiment, the outer diameter D of the ring-shaped loop portion is the minimum size that allows self-supporting and soldering at the time of insertion into the printed circuit board, and the protrusion height from the printed circuit board. By minimizing the dimension H, there is an effect that the thickness of the power supply circuit connection device and the finished printed circuit board can be made thin and small.

In this embodiment, the lead connection member has a configuration having two ring-shaped loop portions. However, a configuration in which one loop portion is provided only in one of the first and second linear bridge portions. It can also be.

FIG. 7 is an exploded perspective view of a part of a remote control transmitter using a power supply circuit connection device according to an embodiment of the present invention, as viewed from the back side.

In FIG. 7, reference numerals 4A and 4A 'denote power supply connection portions, and the + (plus) side and-(minus) side terminals provided on the connection lead members 4 and 4', respectively. Reference numeral 78 denotes a printed circuit board finished product provided with the power supply circuit connecting device of the present invention such as the power supply connection parts 4A and 4A ', the connection lead members 4 and 4', the printed circuit board 1 and the electric component 77, and 70 denotes a power supply. Storage chambers 71 and 71 'for storing the connection portions 4A and 4A', and a recess 72 for storing a dry battery and the like.
Is a power supply unit lid, which is attached to the housing (lower) 70. An operation button 74 is formed of rubber or the like, has a convex portion, and is inserted into an operation button hole 76 of the housing 75 (upper).

Therefore, according to the printed circuit board finished product 78 using the power supply circuit terminal connection device of the present invention, the height of the connection members 4 and 4 ′ protruding toward the operation button 74 can be reduced, and the operation button 74 is also There is an effect that the housing 75 can be made thin.

In this embodiment, the linear terminal portion 4B bent in a hook shape and the ring-shaped loop portion 5 are soldered to the printed circuit board on the side opposite to the side on which the power supply connection terminal section 4A is provided (back side). Although the attachment connection is provided at two places, it may be soldered and joined from the substrate surface on the power supply connection portion 4A side according to the configuration of the soldering surface of the printed board. As described above, when only a small external force is applied to the power supply connection portion, soldering may be performed at one location.

[0046]

As described above, when a dry battery or the like is connected to the terminal connection device for a power supply circuit of the present invention, even if an external force is applied, the external force does not act on the soldered portion and a good conduction state can be maintained. Even when the connection member and the printed circuit board are not connected by soldering, the connection member can maintain self-supporting and locked, and the thickness of the terminal connection device for the power supply circuit can be reduced by making the connection member thinner and smaller. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is an external view of a power supply circuit terminal connection device according to a first embodiment of the present invention before assembly.

FIG. 2 is a side sectional view of the terminal connection device for a power supply circuit in FIG. 1 in an assembled state.

FIG. 3 is a sectional view of a main part of a modified example of the power supply circuit terminal connection device of FIG. 2;

FIG. 4 is an external view of a terminal connection device for a power supply circuit according to a second embodiment of the present invention before assembly.

FIG. 5 is a side sectional view in the direction of arrow A in an assembled state of the power supply circuit terminal connection device of FIG. 4;

6 is a side sectional view in the direction of arrow B in an assembled state of the power supply circuit terminal connection device of FIG. 4;

FIG. 7 is an exploded perspective view of the remote control transmitter using the power supply circuit terminal connection device according to the embodiment of the present invention, as viewed from the back side.

FIG. 8 is a cross-sectional view showing a configuration of a conventional example in which a connecting member has a helical bridge leg.

FIG. 9 is a partial cross-sectional view of a configuration of a conventional example having a substantially U-shaped connecting member.

FIG. 10 is a partial cross-sectional view of another conventional configuration having a substantially U-shaped connecting member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Board 2 Circuit pattern 3 Slot 4 Lead member 5 Ring-shaped loop part 6 Terminal part mounting hole 7A, 7B Solder

Claims (9)

[Claims] 1. A connection lead member having a substantially constant wire diameter mounted on a substrate having a circuit pattern layer, wherein the connection lead member is provided between a bridge portion mounted on a surface of the substrate and the bridge portion. A substantially ring-shaped loop portion having a predetermined outer diameter formed in the portion, and a linear mounting terminal portion that is bent from the bridge portion in a hook shape and extends, and the linear mounting terminal portion corresponds to a corresponding one in the substrate. The ring-shaped loop portion is inserted into the hole formed at the position, is connected and fixed to the circuit pattern layer of the substrate by soldering, and projects in a direction substantially orthogonal to the bridge portion, and is located at a corresponding position in the substrate. A terminal connection device for a power supply circuit, wherein the terminal connection device is inserted into a formed slot to be locked and held. 2. The outer diameter of the ring-shaped loop portion is at least equal to or greater than the length of the slot, is larger than the thickness of the substrate, and is a minimum value that allows self-supporting and soldering when inserted into the slot. The connection device for a power supply circuit according to claim 1. 3. The terminal connection device for a power supply circuit according to claim 1, wherein the height of the insertion protrusion from the substrate surface of the ring-shaped loop portion inserted and held in the slot is equal to or larger than the wire diameter of the connection lead member. 4. The terminal connection for a power supply circuit according to claim 3, wherein an insertion projecting portion of the ring-shaped loop portion inserted and held in the slot from the board surface is connected and fixed to a circuit pattern layer of the board by soldering. apparatus. 5. The terminal connection device for a power supply circuit according to claim 1, wherein an inner wall of the slot into which the ring-shaped loop portion is inserted and locked is substantially perpendicular to a surface of the substrate. 6. The terminal connection device for a power supply circuit according to claim 1, wherein the inner wall of the slot in which the ring-shaped loop portion is inserted and locked is non-perpendicular to the substrate surface and has a trapezoidal cross section. 7. An outer diameter of the ring-shaped loop portion is at least five times a lead wire diameter, and a minimum necessary height of a projecting portion of the ring-shaped loop portion inserted and held in the slot from a substrate surface. 3. The terminal connection device for a power supply circuit according to claim 2, wherein is a value substantially equal to the lead wire diameter d. 8. The connecting lead member is bent at a predetermined angle at an intermediate portion thereof to form first and second bridge portions, and the first and second bridge portions are respectively formed by the first and second bridge portions.
And the first and second ring-shaped loop portions are formed at corresponding predetermined locations in the substrate.
And a first slot inserted and held in the second slot.
A terminal connection device for a power supply circuit as described in the above. 9. The terminal connection for a power supply circuit according to claim 8, wherein at least one of the first and second ring-shaped loop portions inserted and held in the first and second slots is soldered to a circuit board. apparatus.