JP3118179B2 - Power terminal structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of a power supply terminal for electrically connecting a substrate on which a timepiece circuit and other IC chips are mounted to a power supply.

[0002]

2. Description of the Related Art As a conventional power supply terminal of this kind, FIG.
In addition, as shown in FIG. 5, a terminal 2 made of a metal plate is fixed to a mold portion 4 made of an insulating material such as a synthetic resin. When attaching the power supply terminal to the substrate 6, the claw 8 formed integrally with the mold portion 4 is inserted into and engaged with the mounting hole 6 a of the substrate 6.
The upper end of the terminal 2 projecting from the connection hole 6b onto the substrate is soldered with the solder 10.

[0003]

In the above-mentioned conventional power supply terminal, since the molded portion 4 is used to fix the terminal 2, the soldering by DIP or reflow requires the use of the soldering. In this case, it is necessary to select a material that can withstand the heat at the time of forming the mold portion 4. If the mold portion 4 is made of a heat-resistant material as described above, the cost increases. Therefore, soldering by reflow or the like must be performed, and soldering must be performed by hand soldering which is directly performed by an operator. Sex was reduced. In particular, in the case of soldering by hand soldering, a large number of solder bridges connected between a plurality of terminals by solder are generated, which causes a defect and lowers reliability.

[0004] The present invention has been made in view of the above problems,
An object of the present invention is to provide a terminal structure of a power supply terminal capable of easily attaching the terminal and reliably connecting the conductive pattern and the power supply terminal without soldering.

[0005]

According to the present invention, there is provided a terminal structure of a power terminal, comprising: a case having a terminal insertion hole in a power terminal portion;
A substrate having a conductive pattern formed on the surface thereof and being attached to the case, a first terminal having a terminal tip inserted into a terminal insertion hole of the power supply terminal, and a connection portion hooked to the power supply terminal; A second portion having a spring portion that contacts and compresses the conductive pattern when the substrate is attached to the case and a pressure contact portion that is pressed against a connection portion of the first terminal by a spring force of the spring portion. Terminal and
And the second terminal has the pressure contact portion at one end,
At the other end, there is a stopper portion to be locked to the power terminal portion,
In the direction of the substrate between the press-contact portion and the stopper portion,
An ascending spring portion is formed .

[0006]

The terminal in the terminal structure of the power supply terminal of the present invention comprises a first terminal and a second terminal. A terminal end portion provided at one end of the first terminal is inserted into a terminal insertion hole provided at a power supply terminal portion of the case, penetrates the case, and at this time, a connection portion provided at the other end. Is hooked on the power supply terminal of the case. The second terminal is mounted on the power supply terminal portion of the case such that the pressure contact portion provided at one end thereof rides on the connection portion of the first terminal, and at this time, the stopper provided at the other end is provided. Section locks to the power supply terminal section. After the first and second terminals are attached to the power supply terminal portion of the case in this way, when the substrate is attached to the case, the raised spring portion of the second terminal comes into contact with the conductive pattern of the substrate and is compressed. The pressure contact portion of the second terminal is pressed against the connection portion of the first terminal by the spring force of the spring portion.
As described above, in the present invention, when the substrate is mounted on the case, the substrate and the second terminal are pressed against each other, and the first and second terminals are also pressed against each other. The connection between the conductive pattern and the power supply terminal can be made.

[0007]

FIG. 1 is an exploded perspective view showing a terminal structure of a power supply terminal according to an embodiment of the present invention. FIG. 2 is a sectional view showing a state of the terminal structure of the power supply terminal shown in FIG. FIG. 2 is a cross-sectional view showing a state after assembling the terminal structure of the power supply terminal shown in FIG. 1. Reference numeral 2 denotes a case in which a mechanical body such as a clock or various devices are housed. The case 2 has a power supply terminal 2a for connecting a power supply. The power supply terminal portion 2a in this embodiment is provided near the corner of the case 2, and has a terminal insertion hole 2b penetrating through the body portion 2c of the power supply terminal portion 2a, and a positioning boss 2 protruding from the bottom portion 2c.
d is provided. Further, the power supply terminal portion 2a in the present embodiment is provided with a stepped portion 2e which is thickened by the thickness of a first terminal to be described later at the end of the bottom portion 2c, and together with an edge 2f of the case 2 to be described later. A rectangular partition wall 2g surrounding the first and second terminals to be formed is provided. In the partition 2g, recesses 2h and 2i into which a stopper of a second terminal, which will be described later, is fitted at the end of the case 2 on the edge 2f side.
Is provided. On the other hand, in addition to the power supply terminal 2a, the case 2 has a claw 2j for fixing a substrate described later.
And a screw mounting portion 2k are formed at the upper and corner portions of the edge, respectively.

Reference numeral 4 denotes a substrate on which a circuit such as an IC is formed. The circuit board 4 is mounted on the case 2 from above in the figure so that the claw portion 2j of the case 2 is fixed by engaging with the upper surface 4a in the figure. It is. The board 4 in the present embodiment is firmly fixed to the case 2 by screwing the screw 10 to the screw mounting portion 2k of the case 2 through the hole 4b. A conductive pattern 4d is provided on a lower surface 4c of the substrate 4 in the figure at a position corresponding to a second terminal described later. Further, the substrate 4 is provided with a hole 4e that fits the boss 2d of the case 2.

Reference numeral 6 denotes a first terminal formed by bending a flat metal plate. This first terminal 6
A terminal tip 6a extending downward in the figure and the terminal tip 6a
and a connecting portion 6b which is bent at a right angle to the connecting portion 6a. The connection portion 6b is formed with a hole 6c that fits the boss 2d.

Reference numeral 8 denotes a second terminal formed by bending a metal flat plate in the same manner as the first terminal 6.
The second terminal 8 has a press contact portion 8a formed at one end thereof.
And a stopper portion 8 formed at the other end and protruding left and right sides.
b, 8c, and a spring portion 8d which is provided between the press contact portion 8a and the stopper portions 8b, 8c and is bent into a mountain shape and raised. The boss 2d is attached to the press contact portion 8a.
And a guide portion 8e formed of a U-shaped or elliptical cutout or hole that can be engaged with the guide.

The above components are assembled as described below. First, the terminal tip 6a of the first terminal 6 is inserted into the terminal insertion hole 2b of the power supply terminal 2a of the case 2. At this time, by passing the boss 2d of the case 2 through the hole 6c of the connection portion 6b of the first terminal 6, the connection portion 6b is positioned at a predetermined position on the bottom 2c of the power supply terminal portion 2a.
Next, the stopper portions 8b and 8c of the second terminal 8 contact the edge 2f of the case 2 and the concave portions 2h and 2h of the partition 2g.
The second terminal 8 is placed on the step 2 e of the power supply terminal 2 a of the case 2 so as to be fitted to i. At this time, the press contact portion 8a of the second terminal 8 rides on the connection portion 6b of the first terminal 6,
Further, the guide portion 8e engages with the boss 2d with a play in the left-right direction in the figure. Thereafter, when the substrate 4 is put on the case 2, the conductive pattern 4 d on the substrate 4 comes into contact with the apex of the spring portion 8 d of the second terminal 8 at this time, and the substrate 4 holds the spring portion 8 d in the contact state. It is compressed by pressing downward in the figure to crush it. Since the end face of the second terminal 8 where the stopper portions 8b and 8c are provided is in contact with the edge 2f of the case 2, the guide portion 8e and the boss 2d are compressed when the spring portion 8d is compressed. The press contact portion 8a slides rightward in the drawing by the amount of play between the pressure contact portion 8a. When the end of the guide portion 8e contacts the boss 2d and the press-contact portion 8a cannot slide, the press-contact portion 8a is pressed obliquely from the upper left in the figure by the spring portion 8d to connect the first terminal 6 to the connection portion. 6b. The spring portion 8d is compressed while being in contact with the conductive pattern 4d made of copper foil when pressed by the substrate 4, and is integrated with the conductive pattern 4d to make the contact more reliable. The board 4 covered by the case 2 as described above is positioned by the hole 4e conforming to the boss 2d, and is fixed by the engagement of the claw 2j.
Furthermore, it is firmly fixed by the screw 10. In the present embodiment, the board 4 is fixed to the case 2 with the claws 2j and the screws 10, but only one of them may be used.

In the above terminal structure, the conductive pattern 4d and the second terminal 8 are formed by the spring force of the spring portion 8d of the second terminal 8.
In addition to maintaining contact with the first and second terminals 6 and 8, respectively, the elasticity of the spring portion 8d absorbs variations in dimensional accuracy between components.

[0013]

According to the present invention, it is possible to assemble the components simply by putting them in the case one after another, and the terminals can be easily attached without soldering.

In particular, since the contact is secured by the spring force of the second terminal, the joining and the work by soldering or the like are not required, so that the reliability of the product is improved and the mass productivity is further improved. be able to.

Further, since the first terminal and the second terminal are formed as separate members, the spring force can be freely set by changing the thickness of the second terminal.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a terminal structure of a power terminal according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state of the terminal structure of the power supply terminal illustrated in FIG. 1 during assembly.

FIG. 3 is a cross-sectional view showing a state after the assembling of the terminal structure of the power supply terminal shown in FIG. 1;

FIG. 4 is a sectional view showing a terminal structure of a conventional power supply terminal.

5 is a perspective view of a power supply terminal shown in FIG.

[Explanation of symbols]

 2 Case 2a Power supply terminal 2b Terminal insertion hole 2d Boss 2c Bottom 4 Substrate 4d Conductive pattern 4e Hole 6 First terminal 6a Terminal tip 6b Connection 6c hole 8 Second terminal 8a Pressure contact portion 8b, 8c Stopper portion 8d Spring part 8e Guide part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 12/04 H01R 4/48

Claims (1)

(57) [Claims] 1. A cable having a terminal insertion hole in a power supply terminal portion.
And a conductive pattern is formed on the surface and attached to the case.
Substrate, and a terminal tip portion inserted into a terminal insertion hole of the power terminal portion
And a first end having a connection portion hooked to the power terminal portion.
And the substrate is attached to the case,
A spring portion that contacts and is compressed by the conductive pattern;
And is pressed against the connection portion of the first terminal by the spring force of the connection portion.
A second terminal having a pressure contact portion,Has, The second terminal has the pressure contact portion at one end and a front end at the other end.
A stopper portion for locking to the power supply terminal portion;
Between the stopper and the stopper
The thread part is formed Power supply terminal
Construction.