KR200328527Y1 - Non­contact starting switch - Google Patents

Abstract

The present invention is a unit component consisting of a barium titanate-based static characteristic thermistor element having a constant resistance temperature coefficient, an elastic terminal elastically in contact with the element and having a plug for external connection, and a housing for housing the motor. It improves the quality, spring crack, electrical conductivity, etc. by improving the structure of the static contactless start switch used, and provides a contactless start switch to improve the assembly productivity and the quality improvement due to the in-situ assembly. To do it.

That is, the present invention is a conventional solid-state start switch (1) in which the thermistor element (4) is elastically installed with the spring (4) integral tab (6) inside the case (2), and the spring inside the case (2). (5) forms a coupling groove (7) that can be assembled in place, and the spring (5) is a double elastic structure consisting of a roughly V-shaped elastic portion (5a) and stepped elastic portion (5b) 5b), and a square fixing hole 5c is formed at the end of the spring 5 to integrally fix the cocking part 6a of the tab 6, which is separately made of brass, by a cocking operation. It is possible to double the accuracy of assembly and assembly, and to eliminate the closed end that the thermistor element (4) is damaged or excessive in operation due to excessive pressure when assembling, thereby improving operational reliability, safety and quality. It can provide a number of advantages, such as mass production.

Description

Contactless starting switch {Non­contact starting switch}

The present invention relates to a solid-state start switch, and more particularly, to the start of an electric motor, a barium titanate-based static thermistor element having a constant resistance temperature coefficient and an elastic terminal elastically contacted with the element and having a plug for external connection. And, it is composed of housing that houses them, and improves the structure of static contactless start switch used as a unit part, improving quality, spring crack, electrical conductivity, etc., improving assembly productivity, quality improvement due to in-situ assembly To provide a solid state start switch to achieve

BACKGROUND ART In general, a starting device in consideration of the starting characteristics of an electric motor is used in industrial machinery and household appliances using induction motors, and the contactless starting switch using this element has been put to practical use due to the development of the static characteristic thermistor of the near field.

BACKGROUND OF THE INVENTION Static thermistors used in the solid state start switch are widely used as start relays in motor start circuits.

In such a solid state start switch, the spring and the tab which are electrically and mechanically connected to the thermistor are integrally formed, which is a problem in quality. That is, there is a problem such as cracks occur in the spring and electrical conductivity is also reduced,

When the spring and the tab-integral spring are combined in the case, the spring is also inserted into the insert through the coupling hole to which the tab is coupled. Therefore, the correct assembly position of the spring is not set. There were a number of problems, such as damage to the device surface during assembly.

In this invention, as described above, to improve the configuration of the spring tab and the case in the existing contactless start switch to solve the problems of the prior art described above,

The present invention particularly constitutes a contactless start switch, and separately constitutes a spring and a tab, and the tab is made of brass so that it can be integrated in the right position (high quality) by inserting into a square fixing hole of the spring and cocking. However, it is designed to provide a contactless start switch that can contribute greatly to the quality of the product by forming elastic grooves to prevent excessive pressure from being applied to the thermistor element and to form an in-place assembly groove for easy and accurate assembly of the spring. The present invention was completed with the technical task of.

1 is a front perspective view showing a contactless start switch provided in the present invention

Figure 2 is a rear perspective view showing a contactless start switch provided in the present invention

Figure 3 is an exploded perspective view showing a contactless start switch provided in the present invention

4 shows some other embodiments of a solid state starting switch provided in the present invention.

Phosphorus exploded perspective

Figure 5 is a cross-sectional view showing the solid state starting switch provided in the present invention and the main part

Enlarged cross section

6 shows some other embodiments of a solid state starting switch provided in the present invention.

Cross section

Figure 7 is a longitudinal cross-sectional view showing a contactless start switch provided in the present invention

Figure 8 is assembled the thermistor element in the solid state start switch provided in the present invention

Perspective view showing how

■ Explanation of symbols used in main part of drawing ■

1: solid state start switch 2: case

3: cap 4: thermistor element

5: spring 5a, 5b: elastic part

5c: square fastener 6: tab

6a: cocking part 7: coupling groove

7a: joining piece

Figure 1 is a front perspective view showing a contactless start switch (1) provided by the present invention, Figure 2 is a rear perspective view, Figure 3 shows an exploded perspective view, etc. The present invention will be described in detail with these figures as follows. .

The solid state starting switch 1 of the present invention has a case 2 and a cap 3 coupled to a forced engagement therein, and a thermistor element 4 and the elastic support of both sides of the case 2 inside the case 2. In the solid state starting switch (1) consisting of a tab (6) integral with a spring (5) integrally mechanically and electronically coupled, the present invention provides an up and down slide in which the spring (5) can be assembled in the case (2). The coupling groove 7 is formed, and the spring 5 is fitted to the coupling groove 7 in the vertical direction. 4 and 6, the stepped elastic part 5b may be engaged by the auxiliary guide ribs so that the rear side of the spring 5 may be accurately positioned. The joining piece 7a may be further formed.

And the spring 5 is a double elastic portion (5a, 5b) having an elastic portion (5a) bent in a roughly V-type in contact with the thermistor element (4) and an elastic portion (5b) of stepped to the rear side thereof. It consists of a spring (5) made, the spring (5) and the tab (6) to be integrated into the cocking (cocking) coupling.

That is, the tab 6 is separately manufactured of brass having excellent conductivity and then crimped to the outside by the caulking part 6a which is fitted onto the square fixing hole 5c formed on the corresponding surface of the spring 5 by the caulking operation. So that they can be fixed together.

In the figure, reference numeral 8 denotes a tab assembling hole, and 9 denotes a jig for assembling the thermistor element 4.

The solid state starting switch 1 of the present invention, which can be configured as described above, is used as an industrial machine or home appliance using an induction motor,

The present invention is first made of a separate tab (6) of the spring (5) made of brass, and then the cocking part (6a) is fixed to the square fixing hole (5c) of the spring (5) by the cocking operation, the case (2) When assembling the integral tab 6 of the spring 5, the tab 6 is fitted into the tab assembling hole 8, and at the same time, the spring 5 is fixed along the coupling groove 7 formed inside the case 2. Assembly takes place in place.

Then, when the spring 5 is to be assembled and thermistor element 4 is to be assembled between the left and right springs 5, the assembly jig 9 is assembled using a separate assembly jig.

That is, as shown in FIG. 8, the thermistor element 4 is clamped with the assembling jig 9, and then the spring 5 is elastically expanded by interposing the assembling jig 9 between the springs 5. What is necessary is just to settle the element 4 so that damage may not occur between the springs 5, and the assembly jig 9 may be taken out.

Thus, after assembling the spring (5), the integral tab (6), the thermistor element (4) and the cap (3) to the case (2) by force-fitting type, the contactless start switch (1) is assembled, In the assembled state, the thermistor element 4 is kept elastically assembled by the left and right springs 5, and the spring 5 of the present invention has a roughly V-shaped elastic portion directly contacting the thermistor element 4 ( 5a) and elastically supported by the elastic portion (5b) bent in a stepped double can be prevented from applying excessive pressure to the thermistor element (4).

And the tab 6 of the spring (5) integral type is made of brass to improve the electrical conductivity, it is possible to prevent the crack (crack) in advance during use of the spring.

As described in detail above, the contactless start switch 1 provided in the present invention forms a coupling groove 7 in which the spring 5 can be assembled in the right position on the case 2, and the spring 5 ) Is composed of a spring (5) having two elastic parts (5a, 5b) and at the same time integrated tab (6) made of high electrical conductivity brass by cocking (cocking),

According to the present invention, the assembly and the accuracy of the assembly can be doubled, and the thermistor element 4 can be destroyed at the time of assembling or damaged at the excessive pressure. And it can provide a number of advantages, such as safety, quality improvement, mass production.

Claims (2)

In the normal solid-state starting switch (1) in which the thermistor element (4) is elastically installed with a spring (4) -integrated tab (6) inside the case (2); Inside the case (2) forms a coupling groove (7) that can be assembled in the spring 5, The spring 5 has a roughly V-shaped elastic portion 5a and a stepped elastic portion 5b, The contactless start switch, characterized in that the rectangular fixing hole (5c) is formed at the end of the spring (5) integrally fixed to the cocking portion (6a) of the tab (6) made of brass separately by a cocking operation. The method of claim 1; One side of the coupling groove (7) for assembling the spring (5) is a contactless, characterized in that the stepped elastic portion (5b) of the spring (5) formed a coupling piece (7a) that can be engaged by the auxiliary guide Start switch.