JP2771816B2 - Micro switch and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing an ultra-small microswitch.

[Prior Art] As a conventional microswitch, as shown in FIG. 13, a casing is constituted by a body 1 having one side open and a cover 2 attached to the opening of the body 1. In some cases, a cover 2 is attached after a switch mechanism component is incorporated in the device. This micro switch has a common terminal
3 ₁ of the movable spring 4, one end of which is secured to the base, the movable contact 6 formed on the other end of the movable spring 4 to switch from the NC contact ₇₁ side NO contact 7 ₂ side presses with push button 5 There Te, the NC contact ₇₁ while forming the base of the NC terminal 3 _3, NO contacts
7 ₂ is formed on the base of the NO terminal 3 _2. Each pin 3 ₁ to 3 ₃ micro switches are to be fitted from the opening side of the body 1 to the body 1 by press-fitting. This micro-switch, will be terminals 3 ₁ to 3 ₃ each side are arranged the terminals 3 ₁ to 3 ₃ to face in the longitudinal direction of the body 1, between the terminations for 3 ₁ to 3 ₂ There is an advantage that the insulation distance can be increased. Therefore, even in very small micro switch relatively be wider terminals 3 ₁ to 3 _3,
There is an advantage that it can be used as a quick connection terminal or a soldering terminal. However, in this microswitch, terminal 3 ₁
Because -3 ₃ is attached by pressing method, terminals 3 ₁ to 3 ₃ are easy to move by an external force, there is a problem of operating characteristics there is a possibility that unstable. There is also a problem that such is likely to be caused flux and debris from the mating surface between the press-fitting portion and the body 1 and the cover 2 to the body 1 of the terminal 3 ₁ to 3 _3, further insertion of the movable spring 4 and terminal 3 ₁ - 3 ₃ press and of there is also a problem that can not be carried out by an automatic assembly.

As another conventional micro switch, it is that the the body 1 terminal 3 ₁ to 3 ₃ shown in FIG. 14 simultaneously molded. This micro-switch, terminals 3 ₁ to 3 ₃ are difficult to move by an external force, the operating characteristics are stabilized, can be secured flux resistance at the time of soldering, there is an advantage that further automate from parts machining to assembly. However, this microswitch s husband terminals 3 ₁ to 3 ₃ end face of the body 1 for which in the longitudinal direction, the terminal 3 ₁ to 3 ₃ to words in one plane are arranged, in FIG. 13 described above There is a problem that it is difficult to keep the insulation distance as compared with the micro switch. In this case, larger the microswitch is small, since the insulation distance determined by the width of the terminals 3 ₁ to 3 ₃ is narrowed, it becomes impossible to increase the width of the terminals 3 ₁ to 3 _3, the other speed imaging terminal And it cannot be used as a soldering terminal.

Therefore, the notch 8 from both sides provided at the base of the portion exposed to the body 1 outside of the terminal 3 ₁ to 3 ₃ as shown in FIG. 15, by twisting the terminal 3 ₁ to 3 ₃ parts of the cutout 8, can be terminal 3 ₁ to 3 ₃ aspect as shown in FIG. 16 are arranged terminals 3 ₁ to 3 ₃ so as to face in the longitudinal direction of the body 1. However, although there is an advantage of widening the width of the terminals 3 ₁ to 3 ₃ to widen the insulation distance, the mechanical strength of the notches 8 parts is weakened in this case, out the accuracy of the terminals 3 ₁ to 3 ₃ There is a problem that it is difficult.

[Problem to be Solved by the Invention] The specific invention has been made in view of the above points, and an object of the invention is to make use of the advantage of simultaneous molding of a terminal and a body, and to realize a microminiature switch. It is another object of the present invention to provide a method for manufacturing a microswitch in which the width of a terminal can be increased.

Another object of the present invention is to provide a microswitch capable of preventing a molding die from being damaged when a body is formed on a terminal by the manufacturing method of the above specific invention.

Means for Solving the Problems In order to achieve the above object, according to the present invention, a plurality of terminals of a microswitch are stamped out in such a manner that a base side located inside the microswitch is integrally connected to a hoop material. In this manner, the terminal is formed so as to protrude from the hoop material, cutouts are provided at both sides in a direction orthogonal to the terminal protruding direction at the base of the terminal, and a line connecting the tips of the cutouts is a bending line parallel to the terminal protruding direction. The part excluding the base of the terminal is bent at a bending line position in a direction orthogonal to the base plane so that the planes of the part excluding the base of the terminal are substantially parallel to each other, and the body is formed so as to include the bent part. It has been molded.

Further, in the related invention, a portion to be inserted into the insertion groove of the molding die for molding the body of each terminal is chamfered before the body is molded.

(Function) As described above, in the simultaneous molding step of the terminal and the body, the portion excluding the base of the terminal is oriented so that the plane of the portion excluding the base of the terminal is substantially parallel to each other as described above. By adding a terminal bending process to bend the terminals and arranging multiple terminals on the body so that the sides of each terminal face each other, the insulation distance between the terminals is increased and the width of the terminals is increased. In addition, by including the bent part of the terminal in the molded body, the mechanical strength of the terminal is not weakened even if the terminal is bent, and the accuracy is not difficult to be obtained. The merit can be kept as it is.

Also, in the related invention, by chamfering a portion to be inserted into an insertion groove of a molding die for molding the body of each terminal before molding the body, a variation such as lateral deflection of the terminal due to bending is absorbed. Thus, it is possible to prevent a mold from being damaged when the body is formed into the terminal by the manufacturing method of the specific invention.

(Embodiment 1) FIGS. 1 to 5 show an embodiment of the specific invention. Terminal 3 in step of co-molding the terminals 3 ₁ to 3 ₃ In this Example _{1-3 3}
Subjected to bending processing, the bending portion of the terminal 3 ₁ to 3 ₃ are intended to be within the body 1.

Hereinafter will be described the co-molding step and terminals 3 ₁ to 3 ₃ of the present embodiment and the body 1. First, as shown in FIG. 1 (a), the terminal 3 ₁ punched plate material in a state where the base side located inside the micro-switch of the terminals 3 ₁ to 3 ₃ are connected by a hoop material 9
To form a to 3 _3. Note that notches with different heights from both sides so as to facilitate bending in the bent portion of the terminals 3 ₁ to 3 ₃
Form 10. The notch 10 is pin 3 ₁ to 3 ₃ from both sides in the direction orthogonal to the projecting direction from the hoop material 9 of terminals 3 ₁ to 3 ₃
Be those provided in the base portion, it is formed as a notch 10 for connecting the tip line terminal 3 ₁ to 3 ₃ in the projecting direction parallel to bend lines (shown by broken lines in FIG. 1 (a)). Then the terminal
3 ₁ As to 3 ₃ the plane of the portion except for the base portion are parallel to each other, bent 90 ° at the position of the terminal 3 ₁ to 3 ₃ to FIG. 1 (b) as shown in bend line, then the drawing (c) as shown to the terminals 3 ₁
33 The body 1 is formed so as to wrap the bent part of ₃ . Thus the terminals 3 ₁ to 3 ₃ bent 90 ° when secured insulation distance of the terminals 3 ₁ to 3 _3, thus it is possible to increase the width of the terminals 3 ₁ to 3 _3, quick connect terminal and soldering terminal Can be used as Also, bending the terminals 3 ₁ to 3 ₃ before the molding step of the body 1 in the simultaneous molding step, if molded to the bent portion is included in the body 1, as shown in FIG. 15 and FIG. 16 is not or is the strength of the twist portion is weak, the accuracy does not appear as in the case where the terminals 3 ₁ to 3 ₃ twisted outside the body 1 in. In addition, terminals 3 ₁ to a benefit of simultaneous molding
3 ₃ points operating characteristics by strength against external forces is stabilized, also that it can ensure the flux resistance at the time of soldering, which is that it can further automate to assemble from parts machining and maintained. Figure 3 is a diagram showing a micro-switch after the assembly of the case incorporating the other components by cutting and the body 1 terminal 3 ₁ to 3 _3, which is co-molded as described above from the hoop material 9. Meanwhile, in order to improve the lateral oscillation and bending accuracy of the tip portion of the terminal 3 ₁ to 3 _3, the tip of the terminal 3 ₁ to 3 ₃ as illustrated in Figure 4 also may be connected by the hoop member 9.

Embodiment 2 FIGS. 6 to 9 show an embodiment of the related invention. As shown in the first embodiment of the particular invention, the case of providing the terminals 3 ₁ to 3 ₃ and step simultaneously molding step the terminals 3 ₁ to 3 ₃ bent 90 ° with the body 1, the body 1 There is a danger that the molding die 12 will be damaged in the molding process. That is, when the bent terminals 3 ₁ to 3 ₃ must include bent portions of the terminals 3 ₁ to 3 ₃ to the body 1 in order to maintain the mechanical strength of the terminals 3 ₁ to 3 _3,
In this case becomes parallel to the direction of sliding direction and terminals 3 ₁ to 3 ₃ of the mold 12, when variations in bending of the terminals 3 ₁ to 3 _3, terminals 3 ₁ to 3 ₃ against the molding die 12 The mold 12 is damaged. In order to avoid this danger, mold
It is conceivable to increase the width of the terminals 3 ₁ to 3 ₃ of the insertion groove 13 provided in 12, this case is formed burrs often occur in not only detract from the appearance terminals 3 ₁ to 3 ₃ and the body 1 There is a problem of lowering the contact reliability with the device. Therefore, in this embodiment, the portion inserted into the insertion groove 13 of the pre-molding die 12 during punching of terminal 3 ₁ to 3 ₃ as shown in FIG. 6 (a), the insertion of the mold 12 terminals 3 ₁ to 3 ₃ in the groove 13 are so chamfered 11 for guiding to be inserted smoothly (or are). If Hodokose and this chamfer 11, the bending variation absorbs terminals 3 ₁ to 3 ₃ of the can smoothly inserted into the molding die 12, also reduced the risk of damaging the molding die 12. FIG. 8 shows a molded state of the body 1 of this embodiment.

Embodiment 3 FIGS. 10 to 12 show another embodiment of the specific invention. Molding die terminals 3 ₁ to 3 ₃ in the embodiment of the above related inventions
The insertion portion of the insertion groove 13 of the 12 so as to apply and chamfer 11 had been to prevent the breakage of the mold 12 by deflection next terminal 3 ₁ to 3 _3, in the manufacturing method in this embodiment This is to avoid the above points. Plane perpendicular to the sliding direction of the molding die 12 of the terminals 3 ₁ to 3 ₃ when forming the body 1 in this embodiment, that is, the base portion close as possible bent portion of the terminal 3 ₁ to 3 ₃ No. As shown in FIG. 12, the terminal is partially pressed by the terminal pressing pins 14 from both sides. For example, the portion where the round recess B is formed in FIG. Thus terminal 3 ₁
When pressing the ~ 3 ₃ from both sides in the pin 14, lateral deflection is not generated in the terminal 3 ₁ to 3 _3, it is possible to avoid the risk of damaging the molding die 12.

[Effects of the Invention] As described above, in the specific invention, a plurality of terminals of a microswitch are made to project from the hoop material by punching out the base portion located inside the microswitch so as to be integrally connected to the hoop material. The notch is provided at the base of the terminal from both sides in the direction orthogonal to the direction in which the terminal protrudes, and the line connecting the ends of the notch is a bending line parallel to the direction in which the terminal protrudes,
The parts except the base of the terminal are bent at the position of the bending line in a direction orthogonal to the base plane so that the planes of the parts except the base of each terminal are substantially parallel to each other, so as to include the bent part. Since the body is molded, a plurality of terminals can be arranged on the body such that the side surfaces of each terminal face each other, and a large insulation distance between the terminals can be obtained. The width can be increased, and by including the bent part of the terminal in the molded body, the mechanical strength of the terminal will not be weakened even if the terminal is bent, and it will not be difficult to obtain accuracy. The advantage of simultaneous molding is that the strength of the terminal against external force is strong, so that the operating characteristics are stable, or the flux resistance during soldering can be secured, and further, from parts processing to assembly is automated. Kill point has the advantage of being able to hold it. Also, a notch is provided at both sides of the base of the terminal in a direction orthogonal to the direction in which the terminal protrudes, and a line connecting the ends of the notch is a bending line parallel to the protruding direction of the terminal. So that they are almost parallel to each other,
By bending the part excluding the base of the terminal at the position of the bending line in a direction perpendicular to the base plane, the bending can be easily performed by the notch and the terminal can be placed on both sides of the hoop material in the thickness direction of the hoop material. The microswitch can be formed substantially uniformly, and the microswitch can be formed in a small size in the thickness direction of the hoop material so that the terminal does not project to only one side of the hoop material in the thickness direction of the hoop material.

In addition, in the related invention, since a portion to be inserted into the insertion groove of the molding die for molding the body of each terminal is chamfered before molding the body, variations such as lateral deflection of the terminal due to bending are reduced. There is an advantage that it can be absorbed and damage of a molding die can be prevented when the body is molded into the terminal by the manufacturing method of the specific invention.

[Brief description of the drawings]

1 (a) to 1 (c) are explanatory views showing a manufacturing process of an embodiment of the specific invention, FIG. 2 is a partial side view of FIG. 1 (b) viewed from the direction of arrow A, and FIG. a) to (c) are cross-sectional views, side views, and bottom views at the time of completion of the assembly, and FIGS.
(C) is an explanatory view showing a manufacturing process of another embodiment, FIG. 5 is a partial side view viewed from the direction of arrow A in FIG. 4 (b), and FIGS. 6 (a) to (c) are related inventions. FIG. 7 is an explanatory view showing a manufacturing process of one embodiment, FIG. 7 is a partial side view viewed from the direction of arrow A in FIG. 6 (b), FIG.
10 (a) to 10 (c) are cross-sectional views, side views and a bottom view at the time of completion of the assembly, and FIGS. 10 (a) to 10 (c) are explanatory views showing manufacturing steps of another embodiment of the specific invention. FIG. 11 is a partial side view as viewed from the direction of arrow A in FIG. 10 (b), FIG. 12 is an explanatory view when the body is molded, and FIGS. 13 (a) to 13 (c) show the conventional cover. 14 (a) to 14 (c) are sectional views, side views and bottom views of another conventional example, and FIGS. 15 (a) to 15 (c) 16 (a) to 16 (c) are a cross-sectional view, a side view, and a bottom view after processing a terminal of the above conventional example. 1 body, 3 ₁ to 3 ₃ terminals, 9 the hoop material 11 is chamfered, 12 molding die, 13 insertion groove, 14 is a pin.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shiro Maeda 1048 Odomo Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP-A-54-1006851 (JP, A) JP-A-58-64716 (JP, A) JP-A-1-173517 (JP, A) JP-A 62-116409 (JP, U) JP-A 62-180817 (JP, U) JP-A 60-131244 (JP, U) ( 58) Field surveyed (Int.Cl. ⁶ , DB name) H01H 1/00-1/58 H01H 11/00-11/06

Claims (4)

(57) [Claims] 1. A plurality of terminals of a microswitch are formed by projecting from a hoop material by punching out a base portion located inside the microswitch in such a manner as to be integrally connected to the hoop material. Notches are provided from both sides in the direction orthogonal to the direction in which the terminals protrude, and the lines connecting the ends of the notches are bent lines parallel to the direction in which the terminals protrude, and the planes of the parts except for the bases of the respective terminals are substantially parallel to each other. So that
A method for manufacturing a microswitch, characterized in that a portion excluding a base of a terminal is bent at a position of a bending line in a direction orthogonal to a base plane, and a body is formed so as to include the bent portion. 2. The method for manufacturing a microswitch according to claim 1, wherein said terminal is connected to a base portion of said terminal and punched out. 3. The method of manufacturing a microswitch according to claim 1, wherein both sides of the base of each terminal are pressed by terminal holding pins when the body is formed. 4. A plurality of terminals of the microswitch are formed by projecting from the hoop material by punching out the base portion located inside the microswitch so as to be integrally connected to the hoop material. Notches are provided from both sides in the direction orthogonal to the direction in which the terminals protrude, and the lines connecting the ends of the notches are bent lines parallel to the direction in which the terminals protrude, and the planes of the parts except for the bases of the respective terminals are substantially parallel to each other. So that
In a microswitch manufactured by bending a portion excluding a base portion of a terminal at a position of a bending line in a direction orthogonal to a base plane and forming a body so as to include the bent portion, each terminal is formed before the body is formed. A micro switch characterized in that a portion to be inserted into an insertion groove of a molding die for molding a body is chamfered.