RU63979U1 - ELECTRIC CAR BUTTON SWITCH - Google Patents

Abstract

The switch relates to electrical engineering, mainly to the electrical circuits of vehicles. The task and the technical result are to increase reliability, protect indicators from overvoltage, improve manufacturability and reduce the cost of the circuit breaker. Improving lighting performance. The electric car push-button switch consists of a key body fixed to the stock. On the stem is a cam mechanism for the limit position of the stem. Two compression springs are designed to return the rod with the key to its original position. The body has pins for connecting to the vehicle's wiring network. The display unit is made in the form of a printed circuit board containing radio components, including indicators, resistors, diodes, designed for surface mounting. The display unit is installed in the stock. A guide rod is fixed in the rod, on which a contact part is made with a compression spring, made in the form of a bar with two convexes. The bar is made conductive, with silver-containing metal strips deposited on it, on which convexes are made.

The pins have bent pads that act as contact parts, forming force contacts with the bullets. Switches can be made with other modifications of keys, functional symbols, as well as without any symbols and control signaling devices, if they are not needed. Publish figure 1.

Description

The switch relates to electrical engineering, mainly to the electrical circuits of vehicles.

Known push-button switches, see 37.3710, 371.3710, previously produced by JSC "AVAR", Pskov. They have a significant mass, a significant switching force, reduced reliability of the backlight elements, implemented on autolamps.

Known switch 245.3710, manufactured by JSC "AVAR", Pskov, see certificate on PM No. 5667.

This switch consists of a housing in which are placed: a rod, a spring, a base with pins for connecting to the vehicle's wiring network, a backlight and a button, movable contacts.

Disadvantages of the switch:

- there is no axial guide for the rod and spring, which causes distortion, deterioration of the switching conditions, increased noise during operation.

Since the contacts are not removable and rearranged, the switch

It has very limited capabilities for implementing a variety of electrical switching circuits. Designed for specialized electrical circuits.

Known push-button switch 75.3710, manufactured by JSC "AVAR", Pskov, see RF patent No. 2097865, application No. 95112940.

The switch comprises a housing with stops, a key, a rod with symbol backlight lamps and a control signaling device for the key, and a pusher that acts when switching to the contact system. On the base there is a cam mechanism for fixing the limit positions of the stem and a contact system with an instant switching mechanism. The base is rigidly connected to the casing with the help of locking latches.

The longitudinally moving rod in the guides mounted on the base is spring-loaded with springs electrically connected to the terminals in the base and the lamp terminals mounted on the rod.

Its disadvantages are the design complexity and reduced reliability due to the presence of three transition contacts on each spring: plug-spring, spring-contact-part of the bulb; light bulb contact detail. Thus, on four springs there are 12 transitional connections, which can cause loss of contact. The body, stops and base are made as separate parts, which is not technologically advanced.

Known electric automobile push-button switch, see certificate for utility model of the Russian Federation No. 24314.

The switch contains a housing with stops, base, guide pins for return springs. The case with stops, the base, the guiding pins are a single integral part made by dielectric plastic molding. A rod with a LED symbol backlight and a LED indicator of a control signaling device is installed inside the housing. A key is fixed to the stock. A cam mechanism of limit positions is placed on the rod. The base contains pins for connecting to the vehicle wiring system.

Flexible contact holders are fixed on the rod, forming sliding contacts with pins.

The disadvantage of the considered technical solution is the reduced reliability of the backlight elements.

Known patent for utility model No. 32923 MKI7 H01H 13 \ 00 "Electric automobile push-button switch", published September 27, 2003 Bull. Number 27. This switch is taken as the closest analogue (prototype).

Electric automobile push-button switch consists of a housing I with stops 2, base 10, with guide pins II for return springs 8.

The housing I with the stops 2, the base 10, the guide pins II are a single integral part, made, for example, by casting from dielectric plastic. Stem 4 mounted inside housing I

with a lamp 6 or a LED indicator for illuminating the symbol 24, a lamp 14 or an LED indicator for a warning indicator 23.

Switches can be made with other modifications of keys, symbols of functional purpose. And also without any symbols and tell-tales, if they are not needed. On the stem 4, the key 3 is fixed.

On the rod 4 there is a cam mechanism 7 limit positions. The base 10 contains pins 9 for connection to the vehicle wiring network.

The rod 4 contains a rack 12, in the groove 13 of which is placed a strap 17 with a compression spring 15. The strap 17 contains contact parts 18 located at its edges. Pins 19, 20 have bent pads 21, 22.

The switch operates as follows.

In the initial state, key 3 of the switch is not pressed. When you turn on the side lights, the backlight of symbol 24 is turned on from an external circuit.

The LED 6 of the symbol backlight turns on. The level of this backlight can be adjusted from an external control element. In this case, the power contact is open, the control signaling device is not turned on.

The LED indicator light for the symbol and the control indicator have an operating voltage of 12 V.

When the key 3 is pressed, the stem 4 moves to the base 10.

In the pressed position, the rod is fixed by the cam mechanism of the limit positions 7. Through the contact parts 18, the bent pad

21, 22 pins 19, 20 current flows. The consumers connected to the pins 19, 20 are turned on. The control signaling device 23 is turned on from an external circuit connected to the pins 19, 20.

Pressing key 3 again switches the switch to its original position.

The disadvantages of the prototype:

- low reliability of LED indicators at 12 V, failing due to large electrical overvoltages arising in the vehicle electrical system;

- higher cost of LED indicators for 12 V and uneven illumination, giving a light beam with a rotation of only 40 °, compared with SMD diodes of 2.5 V, giving a light beam with a rotation of more than 120 °;

- lack of protection circuits, due to the sufficiently large dimensions of the 12 V LED indicators and the small size of the circuit breaker in the area where the LED indicators are located;

- not the manufacturability of the assembly and installation of LED indicators for 12 V, since they have cylindrical bodies, it is required to perform the operation of forming the terminals, they are installed on a stencil, after which the flexible contacts are pressed in, the terminals are cut off;

- increased consumption of silver-containing metal, since two contact parts mounted on a spring-loaded bar are made of silver-containing metal.

The objective and technical result consists in increasing reliability due to circuit protection of LED indicators against overvoltage, increasing manufacturability and reducing material and labor costs in the manufacture of the circuit breaker. Improving lighting performance and simplifying the design.

This is achieved by new technical solutions that are in a causal relationship with the technical result.

The essence of the claimed device is expressed in the aggregate of the following essential features.

The indicated task in an electric automobile push-button switch containing a housing, a key fixed to the rod, a cam mechanism for the limit positions of the rod with a bracket, return springs for the rod and pins for connecting to the vehicle's wiring network is solved by the fact that it includes an indication unit installed in the rod electrically connected to the pins by means of flexible contacts, which is made in the form of a printed circuit board containing radio components, such as LED indicators, resistors, protective diodes SRI for surface mounting. This achieves such a technical result as improving reliability, increasing the uniformity of the backlighting of the symbol zones and the control signaling device, and the electrical protection of the LED indicators against overvoltage.

A guide rod is fixed in the rod, on which a strap containing two convexes is mounted with a spring. The bar itself has strips of silver-containing metal on which convexes are made. This achieves an increase in manufacturability, a decrease in the consumption of silver-containing materials and a decrease in both material and labor costs, which is also a technical result.

The cathodes of the LED indicators are connected to one pin due to their electrical connection on the printed circuit board, thereby achieving a technical result consisting in increasing the reliability of the circuit breaker and simplifying its design, since instead of 4 pins in position 9, 3 pins in position 6 remain in the prototype ( see figure 2).

The above set of features in comparison with the prior art allows us to conclude that the proposed technical solution meets the criterion of "novelty."

Figure 1 is a General view of the proposed switch in the context, schematically.

Figure 2 - electrical circuit diagram.

Figure 3 is a view along arrow A of the control signaling device and symbol.

Figure 4 - callout B, view of the convex, schematically.

Figure 5 is a view along arrow B on the bar with convexes.

The electric automobile push-button switch (hereinafter referred to as the switch) consists of a housing 1, a key 2, mounted on a rod 3.

On the stem is a cam mechanism 4 of the limit position of the stem with a bracket. Two compression springs 5 are designed to return the stem with

key to the starting position. In the housing 1 there are three pins 6 and one each 7 and 8 for connecting to the vehicle's wiring network. The display unit 9, installed in the stem 3, is made in the form of a printed circuit board 10 containing radio components, including LED indicators 11, 12, giving a light beam with a 120 ° angle rotation, compared with 12 V LEDs giving a light beam with a rotation of only 40 °, what is the technical result achieved - improved lighting performance, resistors 13, protective diodes 14, which are elements of electrical protection, performed for surface mounting, which is a technical result that ensures reliability.

The indicating unit 9 is installed in the stem 3, is electrically connected by soldering with flexible contacts, which, in turn, form sliding contacts with pins 6, thereby achieving a technical result, which consists in reducing the number of contacting joints by contact method, which improves the reliability of the circuit breaker.

The cathodes of the LED indicators 11, 12 are connected to one pin 6 due to their electrical connection on the printed circuit board 10 (figure 2) of the display unit 9 (figure 1), which achieves the technical result, which consists in increasing the reliability of the switch and simplifying its design, so as instead of 4 pins 9, as in the prototype, there are 3 pins pos.6 (figure 1, 2).

A guide rod 15 is fixed in the rod 3, on which a contact part 17 is mounted with a compression spring 16, made in the form of a bar with at least two convexes 18. The bar can be a team with contact parts attached instead of a convex.

The strip is made conductive with the strips 19 made of silver-containing metal deposited on it, on which said convexes are made, thereby achieving a technical result consisting in saving silver-containing metal and improving manufacturability.

The pins 7, 8 have bent pads 20, 21, which perform the functions of contact parts, forming an electric circuit with the bar 17 and its bullets 18 when they are closed.

The switch operates as follows.

In the initial state, key 2 is not pressed. When you turn on from the external controls of the marker lights, the backlight of the symbol 22 with the LED 12 turns on. The level of this backlight can be adjusted from an external control device (not shown in the drawing).

The electric circuit is open, the control indicator is not illuminated. When you press 2, the rod 3 together with the guide rod 15 and the bar 17, which is pressed by the spring 16, are moved down. In the pressed position, the rod 3 is fixed by a cam mechanism 4 with a bracket of limit positions. In this case, the strap 17 with the bullets 18 closes the bent pads 20.21 of the pins 7, 8, as a result of which a closed electrical circuit is formed between the pins 6 and 7, allowing it to flow through it

electric current, and thereby the power consumer connected to the pin 7 or 8, is supplied with a supply voltage.

The LED indicator 11, connected to two of the three pins 6 and connected by an external electrical circuit to the consumer, turns on and illuminates the indicator 23.

Pressing key 2 again switches the switch to its original position. The power contacts between the pins 7, 8 open, the voltage from the consumer and the LED 11 is removed, and it turns off.

The use of the claimed technical solutions provides high reliability and adaptability of the circuit breaker for use in promising passenger cars.

Improved lighting performance, reduced cost.

Switches can be made with other modifications of keys, functional symbols, as well as without any symbols and control signaling devices, if they are not needed.

Claims (3)

1. Electric automobile push-button switch, comprising a housing, a key mounted on the rod, a cam mechanism for the limit position of the rod with a bracket, return springs for the rod and pins for connecting to the vehicle's vehicle network, characterized in that it includes an indication unit installed in the rod, electrically connected to these pins and made in the form of a printed circuit board containing radio components in the version for surface mounting, while a guide rod is fixed in the rod, on which ovlena with spring lath. 2. The switch according to claim 1, characterized in that said strip comprises strips of silver-containing metal on which at least two convexes are made. 3. The switch according to claim 1, characterized in that the display unit contains radio components, at least LED indicators, resistors, diodes, while the cathodes of the LED indicators are combined and connected to one pin by an electrical connection on a printed circuit board.