JPH0721891A - Blade spring support device - Google Patents

Abstract

PURPOSE:To make molding powder hardly generate a CONSTITUTION:In a leaf sprung support device having a support base 1 having a regulating part 11 formed from a molding material a blade spring 21 inserted to the regulating part while one surface 21b side is slid on it, and supported by and fixed to the support base 1, the leaf spring 21 is formed on the top end position in the direction where a bent piece 21e bent on the other surface 21d side is inserted to the regulating part 11. Thus, since the round bent outside part of the bent piece 21e is inserted while the one-surface 21b side is slid onto the regulating part 11 formed by the molding material even when the drawing roundness of the rupture surface formed at drawing is laid in an extremely small and sharp state because of the relatively small thickness of the plate having spring property, the molding powder is difficult to generate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate spring supporting device for supporting and fixing a plate spring to constitute an electromagnetic relay or the like.

[0002]

2. Description of the Related Art Conventionally, as a leaf spring supporting device of this type,
As shown in FIGS. 5 to 7, there are some which constitute an electromagnetic relay.

[0003] A is a support base, which is formed of a molding material into a substantially flat plate shape by providing a restriction portion A ₁ having a rounded portion A ₁₁ at a corner, and a contact portion B on one side including the restriction portion A _1. However, the electromagnet section C that drives the contact section B is mounted on the other side, respectively. The contact portion B has two leaf springs B ₁ and B ₂ each having contact points B ₁₁ and B ₂₁ that can be brought into contact with and separated from each other fixed to one end portion, and the other end portion is supported and fixed to the support base A. .

As shown by an arrow in FIG. 5, the _first leaf spring B ₁ is slidably in contact with the side surface A ₁₂ through the rounded portion A ₁₁ of the regulating portion A ₁ at one end surface B ₁₂ side. The other end is inserted and fixed to the support base A, and when the support is fixed, the spring is biased against the restricting portion A ₁ so that the position is restricted.

Then, as shown in FIG. 7, the second leaf spring B ₂ is pressed and driven by the driving member C ₁ responsive to the electromagnet portion C, so that the contact B ₂₁ first contacts the contact B ₁₁ . rear,
When a predetermined contact pressure is secured against the urging force applied to the regulating portion A ₁ by the spring, the first leaf spring B ₁ separates from the regulating portion A ₁ while both contacts slide on each other.

[0006]

In the above-mentioned conventional leaf spring supporting device, the first leaf spring B ₁ is first provided at the corner portion with respect to the regulating portion A ₁ formed of the molding material. Although it is easy to inserted along the rounded section a ₁₁ from being inserted through the round portion a _11, then the side surface of the one surface B ₁₂ side a
It is inserted while sliding on ₁₂ .

At this time, since the first plate spring B ₁ has a relatively thin plate thickness so as to have springiness, the so-called punched-out radius generated on the fracture surface during the punching process is extremely small and sharp. , The side surface of the regulating part A ₁ with its fracture surface A ₁₂
Molding powder is generated by scraping while sliding contact with each other, and eventually problems such as contact failure of contacts may occur unless cleaning is performed to remove the molding powder.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a leaf spring supporting device in which molding powder is unlikely to be generated.

[0009]

In order to solve the above-mentioned problems, a leaf spring supporting device of the present invention comprises a support base having a restricting portion formed of a molding material, and one side of the restricting portion slidingly contacting the supporting base. In the leaf spring supporting device including a leaf spring that is inserted and attached while being supported and fixed to the support base, the leaf spring is bent in the direction of the other side and is inserted in the regulating portion. It is configured to be formed at the tip position.

[0010]

According to the above-described leaf spring supporting device of the present invention, since the leaf spring has a relatively thin thickness so as to have spring properties, the cutting radius of the fracture surface produced during punching is extremely small and sharp. However, since the bent piece bent to the other surface side is formed at the tip position in the direction of being inserted into the restriction portion, the one surface side is slidably contacted with the restriction portion formed of the molding material. However, since the bent outer side portion of the bent piece, which is rounded, is inserted and attached, molding powder is less likely to be generated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This is what constitutes an electromagnetic relay.

Reference numeral 1 denotes a support, which is formed of a molding material such as a synthetic resin into a substantially flat plate shape. On one side thereof, a partition wall for properly mounting the later-described contact part 2 and electromagnet part 3 insulated from each other is provided upright, and as a part thereof, the restricting part 11 has the rounded part 11a at the corner part. Is provided.
Further, where the contact portion 2 is mounted, two narrow groove-shaped support holes 1b, 1b are penetrated in parallel.

The contact portion 2 is composed of two first leaf springs 21 and second leaf springs 22. Both leaf springs 21 and 22 can be brought into contact with or separated from each other at one end portion on the one surface 21b or 22b side. Contacts 21a, 22
In addition to fixing a, the support pieces 21c, 22c are extended from the other end with appropriate press-fitting projections.

In the first leaf spring 21 on one side, a bent piece 21e bent toward the other surface 21d is formed at one end on one side, and the bent outer side of the bent piece 21e is rounded. It has become. Then, as shown by the arrow in FIG. 1, the first leaf spring 21 is inserted and attached to the side surface 11b through the rounded portion 11a of the regulating portion 11 while sliding the one surface 21b side of the one end portion to the side surface 11b. 21c is press-fitted into the support hole 1b of the support base 1 by means of a press-fitting protrusion to be supported and fixed.
The spring is biased against 11 and the position is regulated. Also, the one side position of one end of the bent piece 21e is
At the tip position in the direction of being inserted into the restriction portion 11,
The bent outer part of 21e is inserted into the restriction part 11.

The other second leaf spring 22 has one end as a free end without being regulated like the first leaf spring 21, and the supporting piece 22c is a press-fitting projection to support the support hole 1b of the support base 1b.
It is press-fitted into and supported and fixed.

The electromagnet section 3 includes an iron core 3a, a coil 3b wound around the iron core 3a, a yoke 3c fixed to one end of the iron core 3a, and an iron core 3a.
One end of the iron core 3a is attracted to the other end of the iron core 3a when the coil 3b is excited by being configured with a substantially L-shaped armature 3d whose one end is attracted to the other end of the iron core 3a. The driving member 3e is adapted to be pressed by the other piece of the armature 3d.

Explaining the operation of this, when the second leaf spring 22 is pressed and driven by the driving member 3e which responds to the electromagnet portion 3 as described above, as shown in FIG. The contact point 22a of the leaf spring 22 is the contact point 21a of the first leaf spring 21.
The first leaf spring 21 that is urged by the regulating portion 11 after being abutted against the spring.
If a predetermined contact pressure is secured against the biasing force of
As shown in FIG. 3, the first leaf spring 21 separates from the restriction portion 11 while the both contacts slide on each other.

In such a leaf spring supporting device, since the first leaf spring 21 has a relatively thin thickness so as to have a spring property, the fracture radius of the fracture surface produced during punching is extremely small and sharp. However, since the bent piece 21e bent to the other surface 21d side is formed at the tip position in the direction in which it is inserted into the restriction portion 11 of the support base 1, the restriction portion formed by the molding material is used. While making one side 21b side slidably contact with 11
Molded powder is less likely to be generated because the bent outer part of the e shape is inserted and attached, and problems such as contact failure of contacts do not occur even without cleaning to remove molded powder. .

In this embodiment, the leaf spring supporting device constitutes an electromagnetic relay, but it may be a contact opening / closing device having no electromagnet part 3.

In this embodiment, the first leaf spring 21 provided with the contact 21a is shown as an example. However, the first leaf spring 21 is inserted into the regulating portion while being slidably in contact with one side thereof, and is supported and fixed to the support base. The leaf spring may be, for example, a leaf spring which has no contact point and is simply used as a spring load.

[0021]

According to the leaf spring supporting device of the present invention, the leaf spring is
Since the plate thickness is relatively thin so as to have spring properties, even if the cutting radius of the fracture surface that occurs during punching is extremely small and sharp, the bent piece bent to the other surface side is inserted into the regulation part. Since it is formed at the tip position in the direction of the arrow, the curved outer side portion of the bent piece is inserted while sliding one surface side to the regulation portion formed of the molding material. As a result, molding powder is less likely to be generated.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention.

FIG. 2 is a perspective view showing the same as above.

FIG. 3 is a plan view showing a main part of the above.

FIG. 4 is a plan view showing an operating state of the above.

FIG. 5 is a front view showing a main part of a conventional example.

FIG. 6 is a perspective view showing the whole of the above.

FIG. 7 is a plan view showing a main part of the above.

[Explanation of symbols]

 1 Support base 11 Restriction part 21 Leaf spring (more specifically, first leaf spring) 21b One surface 21d Other surface 21e Bent piece

Claims (1)

[Claims] 1. A leaf spring comprising: a support base having a regulation portion formed of a molding material; and a leaf spring that is inserted into the regulation portion while slidingly contacting one side thereof and fixedly supported by the support base. In the supporting device, the leaf spring is formed such that a bent piece bent toward the other surface side is formed at a tip end position in a direction in which the bent piece is inserted into the regulating portion.