ETX-D type LED railway signal bulb with LED as light source

Abstract

The utility model discloses an ETX-D type LED railway signal bulb with an LED as a light source. The ETX-D type LED railway signal bulb with the LED as the light source comprises a shell, an LED point light source chip aluminum substrate, a circuit board, a resistance module board and a wire inlet bolt terminal, the LED point light source chip aluminum substrate, the resistor module board and the wire inlet bolt terminal are all electrically connected with the circuit board. The LED point light source chip aluminum substrate comprises an aluminum substrate and high-power LED chips which are arranged on the aluminum substrate and serve as a main light source and an auxiliary light source. A voltage input circuit, a rectification filter circuit, a voltage stabilization constant current circuit, a control circuit, a current detection circuit and a current compensation circuit which are electrically connected in sequence are integrated on the circuit board, and the LED point light source chip is electrically connected with the control circuit; and the resistor module board adopts a resistor compensation module and is electrically connected with the current compensation circuit. By adopting the arrangement, the current of the LED bulb can reach the current when an incandescent bulb works, and the LED bulb can adapt to an original lighting unit without changing an original lighting system circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to a LED point light source special for railway signal system, is designed for replacing railway signal incandescent bulb, belongs to the technical field of railway signal lamp, and specifically relates to an ETX-D type LED railway signal bulb with LED as light source. BACKGROUND

[0002] The railway signal display system plays an important safety role in railway driving safety. At present, the incandescent bulb used on the railway line has simple design and strong anti-interference ability, but the short service life thereof usually needs to be maintained with great work load and increased cost.

[0003] The traditional signal bulb and lamp holder structure comprises a railway signal bulb focusing disc, a lamp holder public end reed, a lamp holder auxiliary reed, a lamp holder main reed, and a railway signal bulb focusing disc bottom contact point. The railway signal bulb and the lamp holder have problems. The railway signal bulb needs to be frequently replaced due to the short service life, and in the replacement process, the lamp holder public end reed cannot firmly clamp the railway signal bulb, and the lamp holder main and auxiliary reeds cannot well contact the focusing disc bottom contact point, thereby causing the bulb to switch to the auxiliary reed and alarm or black light. At the same time, the main and auxiliary reeds of the traditional lamp holder will be fatigued and lose elasticity after long time use, causing the focusing disc bottom contact point of the railway signal bulb and the main and auxiliary reeds of the lamp holder to be in poor contact and cause black light, false alarm and other faults. In addition, the main and auxiliary reeds and the public end reed will be rusted or have increased resistance after long time outdoor work in harsh environment, which will cause poor conduction with the bulb and cause black light, false alarm and other faults. Therefore, a new type of LED railway signal bulb needs to be developed to replace the existing railway signal incandescent bulb.

[0004] The known LED point light source chip has the advantages of energy-saving stability, small power consumption and long service life, but how to use the LED point light source chip to make the LED bulb reach the current of the incandescent bulb and meet the adaptation to the original lighting unit so that the indoor filament relay works normally without changing the original lighting system circuit is a key technical problem to be solved. Utility model content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a LED railway signal bulb, which can make the LED bulb reach the current of the incandescent bulb and meet the adaptation to the original lighting unit without changing the original lighting system circuit.

[0006] The purpose of the utility model is achieved by the following technical scheme:

[0007] The utility model provides an ETX-D type LED railway signal bulb of LED light source, including the casing and the LED point light source chip aluminum substrate, the circuit board, the resistance module board, the incoming line bolt terminal set up on the casing, the LED point light source chip aluminum substrate, the resistance module board, the incoming line bolt terminal all with the circuit board electric connection,

[0008] The LED point light source chip aluminum substrate includes an aluminum substrate and a high-power LED chip as a main and auxiliary light source disposed on the aluminum substrate.

[0009] The circuit board integrates a voltage input circuit, a rectifier filter circuit, a voltage stabilizing and constant current circuit, a control circuit, a current detection circuit and a current compensation circuit in sequence, the LED point light source chip is electrically connected with the control circuit, the resistance module board adopts a resistance compensation module, and the resistance compensation module is electrically connected with the current compensation circuit.

[0010] Further, the casing includes an upper casing and a lower casing connected together, the upper casing is provided with a passage, an inner bottom surface of the passage is provided with a wire passing hole, the lower casing is provided with a wire slot, the LED point light source chip aluminum substrate and the circuit board are arranged in the passage, the resistance module board and the incoming line bolt terminal are arranged on the lower casing, and the lines of the resistance module board and the incoming line bolt terminal pass through the wire slot and the wire passing hole and are electrically connected with the LED point light source chip aluminum substrate or the circuit board.

[0011] The utility model has the following beneficial effects:

[0012] 1. The ETX-D type LED railway signal bulb has the LED point light source chip aluminum substrate, the circuit board, the resistance module board and the incoming line bolt terminal arranged on the casing, wherein the LED point light source chip aluminum substrate, the resistance module board and the incoming line bolt terminal are electrically connected with the circuit board.

[0013] 2、The ETX-D type LED railway signal bulb of the utility model is compared with the traditional signal bulb and the lamp holder structure: the ETX-D type LED railway signal bulb of the utility model, because the internal LED point light source chip aluminum substrate, circuit board, resistance module board, incoming line bolt terminal and other components are connected in an electric connection mode, the problem of poor contact between the fixed focus disc of the railway signal bulb and the lamp holder spring piece is avoided, and the situation of affecting system work caused by poor contact and other problems is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure schematic view of the utility model.

[0015] Figure 2 It is the overall structure explosion view of the utility model.

[0016] Figure 3 It is the overall structure schematic view of another view of the utility model.

[0017] Figure 4 It is the working principle view of the utility model.

[0018] Figure 5 It is the principle view of the voltage input circuit, rectification filter circuit, voltage stabilizing constant current circuit of the utility model.

[0019] Figure 6 It is the principle view of the current compensation circuit of the utility model.

[0020] Figure 7 It is the principle view of the current detection circuit of the utility model.

[0021] Figure 8 It is the principle view of the control circuit of the utility model.

[0022] Figure 9 It is the principle view of the constant current and lighting circuit of the utility model.

[0023] In the drawing: 1, upper shell; 1-1, passage; 1-2, wire hole; 2, lower shell; 2-1, wiring groove; 2-2, step; 2-3, sink groove; 3, LED point light source chip aluminum substrate; 4, circuit board; 4-1, voltage input circuit; 4-2, rectification filter circuit; 4-3, voltage stabilizing constant current circuit; 4-4, control circuit; 4-5, current detection circuit; 4-6, current compensation circuit; 5, resistance module board; 6, incoming line bolt terminal; 7, heat dissipation plate; 7-1, through groove; 8, heat dissipation cover plate; 8-1, mounting groove; 9, protection cover plate; 9-1, light transmission hole; 10, terminal protection shell; 10-1, storage groove; 11, base; 11-1, fixed hook; 12, nameplate. DETAILED DESCRIPTION

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Terms such as “upper,” “inner,” “middle,” “left,” “right,” and “one” used in this specification are merely for clarity of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the present invention.

[0025] This invention addresses the problems of short lifespan and poor contact in existing railway signal incandescent bulbs by developing and designing the EXT-D type railway signal bulb to replace traditional railway signal incandescent bulbs. Furthermore, the EXT-D type railway signal bulb is further optimized to enable the LED bulb to achieve the same operating current as the incandescent bulb, and to be compatible with the original lighting unit, allowing the indoor filament relay to work normally without changing the original lighting system circuit.

[0026] Based on this, the structure and principle of the ETX-D type LED railway signal bulb of this utility model will be described in detail below:

[0027] An ETX-D type LED railway signal bulb, such as Figures 1 to 9 As shown, it includes a housing, and an LED point light source chip aluminum substrate 3, a circuit board 4, a heat dissipation device, a resistor module board 5, an inlet bolt terminal 6, a protective cover 9, and a nameplate 12 disposed on the housing.

[0028] The housing includes an upper housing 1 and a lower housing 2 connected by screws. The upper housing 1 is made of flame-retardant reinforced nylon plastic. A channel 1-1 is opened on the side of the upper housing 1, and a wire hole 1-2 is opened on the inner bottom surface of the channel 1-1. The lower housing 2 has a wiring groove 2-1, which is connected to the wire hole 1-2. The LED point light source chip aluminum substrate 3 and the circuit board 4 are both set in the channel 1-1. The resistor module board 5 and the wire inlet bolt terminal 6 are both set on the lower housing 2. The LED point light source chip aluminum substrate 3 is electrically connected to the circuit board 4. The wires of the resistor module board 5 and the wire inlet bolt terminal 6 pass through the wiring groove 2-1 and the wire hole 1-2 and are electrically connected to the circuit board 4.

[0029] The heat dissipation device includes a heat sink 7 and a heat sink cover 8, both of which are screwed onto the upper housing 1. The heat sink 7 and the heat sink cover 8 cover both ends of the channel 1-1 respectively. The LED point light source chip aluminum substrate 3 and the circuit board 4 are respectively disposed on the heat sink 7 and the heat sink cover 8 to dissipate the heat generated by the LED point light source aluminum substrate and the circuit board 4, so as to ensure that the LED point light source chip aluminum substrate 3 and the circuit board 4 are within a suitable operating temperature range and thus improve their service life.

[0030] The heat sink 7 has a plate-shaped groove (not shown) on its side, and a through groove 7-1 on the inner bottom surface of the plate-shaped groove. The LED point light source chip aluminum substrate 3 is screwed and installed in the plate-shaped groove. The LED light of the LED point light source chip aluminum substrate 3 is directly opposite the through groove 7-1, so the light source of the LED light can shine outward through the through groove 7-1 to reduce the phenomenon of light blocking. The heat sink cover 8 is L-shaped, and the inner surface of the L-shaped opening of the heat sink cover 8 has a mounting groove 8-1. One end of the heat sink cover 8 extends into the channel 1-1 and abuts against the heat sink 7. The circuit board 4 is screwed and installed in the mounting groove 8-1. Thus, the heat sink 7 and the heat sink cover 8 can be used as a whole to dissipate heat and cool down the LED point light source chip aluminum substrate 3 and the circuit board 4 simultaneously, thereby improving their service life.

[0031] In this embodiment, the LED point light source chip aluminum substrate 3 includes an aluminum substrate and a high-power LED chip as the main and auxiliary light source disposed on the aluminum substrate. The aluminum substrate can transfer the heat of the LED point light source chip to the heat sink more quickly, and finally the heat dissipation device attached to the aluminum substrate dissipates the heat. This design greatly improves the heat dissipation function.

[0032] like Figures 1 to 9 As shown, circuit board 4 integrates a voltage input circuit 4-1, a rectifier and filter circuit 4-2, a voltage regulator and constant current circuit 4-3, a control circuit 4-4, a current detection circuit 4-5, and a current compensation circuit 4-6, all electrically connected in sequence. The LED point light source chip is electrically connected to the control circuit 4-4. The voltage input circuit 4-1 controls the input voltage of circuit 4-4. The rectifier and filter circuit 4-2 rectifies and reduces noise from the input voltage. The voltage regulator and constant current circuit 4-3 stabilizes the operating voltage and current of the circuit. The control circuit 4-4 controls the on / off state of the LED bulb on the aluminum substrate 3 of the LED point light source chip and the switching between main and auxiliary light sources. The current compensation circuit 4-6 compensates the primary input current to meet the operating requirements of the indoor filament monitoring relay. The current detection circuit 4-5 detects the primary input current. When the primary current is below a threshold value, the circuit will be in a blackout state to ensure the reliable tripping of the indoor filament monitoring relay, thus fulfilling the fault-oriented safety requirements of the railway system.

[0033] In this embodiment, the resistor module board 5 uses a resistor compensation module, which is electrically connected to the current compensation circuit 4-6. The resistor compensation module ensures that the incoming current meets the requirements for the indoor relay H18 to reliably pick up, and also functions as a current compensation module.

[0034] It should be noted that the voltage input circuit 4-1, the rectification filter circuit 4-2, the voltage stabilizing and constant current circuit 4-3, the control circuit 4-4, the current detection circuit 4-5, the current compensation circuit 4-6 and the resistance compensation module are all conventional technologies, and the circuit board 4 formed by integrating the above circuits is mainly stacked in function.

[0035] The protective cover plate 9 is attached to the surface of the heat dissipation plate 7, the protective cover plate 9 is provided with a light transmission hole 9-1, the light transmission hole 9-1 is opposite to the channel 1-1, so as to protect the LED point light source chip aluminum substrate 3 from being damaged during transportation, and has the function of being convenient to disassemble.

[0036] When the LED bulb works, the light generated by the LED point light source chip aluminum substrate 3 can be emitted through the light transmission hole 7-1, and different light signal requirements can be realized through the color glass of the color light signal mechanism.

[0037] In the embodiment, the nameplate 12 is arranged on the shell, and specifically can be arranged on the upper shell 1 or the surface of the heat dissipation device. The nameplate 12 has related parameters of the ETX-D type LED railway signal bulb, so that the user or the maintenance personnel can use or maintain correctly according to the product parameters.

[0038] In the embodiment, the side surface of the lower shell 2 is provided with a step 2-2, three bolt interfaces are arranged on the step 2-2 and correspond to the auxiliary wire terminal, the common terminal and the main wire terminal respectively, the number of the wire inlet bolt terminals 6 is three, and the three wire inlet bolt terminals 6 are connected with the three bolt interfaces respectively. Therefore, the LED bulb can be electrically connected with the light testing transformer through the three wire inlet bolt terminals 6, so as to change or control the working voltage of the LED point light source chip by using the light testing transformer. At the same time, the terminal protection shell 10 is arranged on the step 2-2, three receiving grooves 10-1 are arranged in the terminal protection shell 10 and correspond to the three wire inlet bolt terminals 6, and the wire inlet bolt terminals 6 are received in the receiving grooves 10-1, so as to protect the wire inlet bolt terminals 6.

[0039] In the embodiment, the bottom surface of the lower shell 2 is provided with a sink groove 2-3, the wiring groove 2-1 is arranged on the inner bottom surface of the sink groove 2-3, and the resistance module plate 5 is received in the sink groove 2-3. The wiring of the resistance module can also be arranged upwards from the wiring groove 2-1 below, so as to have the advantages of compact structure and simple wiring. In addition, the bottom surface of the lower shell 2 is connected with the base 11 through a screw lock, the base 11 covers the sink groove 2-3, and the base can be connected and fixed with the resistance module plate 5 at the same time through the screw, so as to have the advantages of simple installation and convenient replacement. The side surface of the base is provided with a fixing hook 11-1.

[0040] Based on this, the working process of the ETX-D type LED railway signal lamp is as follows:Figures 6 to 9 as shown:

[0041] The incoming line bolt terminal 6 of the ETX-D type LED railway signal bulb is provided with a secondary filament terminal, a common terminal and a main filament terminal from left to right, which are respectively connected with the secondary filament FS terminal, the common G terminal and the main filament ZS terminal of the original lighting unit.

[0042] When the overall device is powered by the main filament terminal and the common terminal of the lighting unit, the 12v power supply voltage after rectification is detected to be normal by the control circuit 4-4, the control current compensation circuit 4-6 is connected between the main filament and the common terminal loop, so that the main filament terminal of the lighting unit obtains stable current compensation, and the indoor H18 relay is reliably attracted. At this time, the compensation current is detected by the current detection circuit 4-5, and when the measurement result is lower than the set value, it indicates that the power supply voltage is too low or the compensation circuit is faulty, and the LED lamp of the ETX-D type railway signal lamp will work on the secondary filament terminal. When the current measurement result is normal, the control circuit 4-4 controls the constant current and lighting circuit (LED light source chip aluminum substrate 3) to be turned on, so that the main filament LED chip works normally.

[0043] When the LED main filament chip of the LED light source chip aluminum substrate 3 is broken or the main filament power supply detection circuit detects that the device incoming line main filament terminal side is open circuit and loses power, the control circuit 4-4 controls the main filament terminal side compensation circuit to be disconnected. At this time, the lighting unit will be switched to the secondary filament FS terminal and the common G terminal power supply due to insufficient current of the main filament terminal or no loop formed. The main filament power supply detection circuit detects that the ETX-D device is powered by the secondary filament terminal and the common terminal, and detects that the rectified 12v voltage is normal, and then controls the secondary filament side current compensation circuit 4-6 to be connected between the device incoming line secondary filament FS terminal and the common G terminal, so that the secondary filament terminal of the lighting unit obtains stable current compensation, and the indoor H18 relay is reliably attracted. At the same time, the control circuit 4-4 controls the lighting circuit to be switched to the secondary filament LED chip to work.

[0044] In summary, the ETX-D type LED railway signal bulb of the utility model, by setting LED light source chip aluminum substrate 3, circuit board 4, resistance module board 5, incoming line bolt terminal 6 in the shell, wherein, LED light source chip aluminum substrate 3 and resistance module board 5 are electrically connected with circuit board 4, incoming line bolt terminal 6 is electrically connected with circuit board 4. Therefore, during work, the circuit board 4 and the resistance module board 5 can adjust the current of the circuit to make the LED bulb reach the current when the incandescent lamp works, and at the same time, it can meet the adaptation to the original lighting unit. At the same time, the incoming line bolt terminal 6 is externally connected with the required lighting transformer, so that the LED light source of the LED light source chip aluminum substrate 3 is in a normal voltage working environment, and the indoor filament relay can work normally, and the original lighting system circuit is not changed.

[0045] Compared with the conventional signal bulb and the lamp holder structure, the ETX-D type LED railway signal bulb has the following advantages: the internal LED point light source chip aluminum substrate 3, the circuit board 4, the resistance module board 5, the wire inlet bolt terminal 6 and other components are connected in an electric connection mode, the problem of poor contact between the focusing disc of the railway signal bulb and the lamp holder spring piece is avoided, and the influence of the system work caused by the poor contact and other problems is prevented.

[0046] The embodiments of the utility model are not limited to this, according to the above content of the utility model, using the ordinary technical knowledge and usual means in the art, under the premise of not departing from the above basic technical thought of the utility model, the utility model can also make other various forms of modification, replacement or combination, all fall within the protection scope of the utility model.

Claims

1. An ETX-D type LED railway signal bulb using LED as the light source, characterized in that, The device includes a housing, and an LED point light source chip aluminum substrate, a circuit board, a resistor module board, and an inlet bolt terminal disposed within the housing; the LED point light source chip aluminum substrate, the resistor module board, and the inlet bolt terminal are all electrically connected to the circuit board; The LED point light source chip aluminum substrate includes an aluminum substrate and a high-power LED chip as the main and secondary light source disposed on the aluminum substrate. The circuit board integrates a voltage input circuit, a rectifier and filter circuit, a voltage regulator and constant current circuit, a control circuit, a current detection circuit, and a current compensation circuit that are connected in sequence. The LED point light source chip is electrically connected to the control circuit. The resistor module board uses a resistor compensation module, which is electrically connected to the current compensation circuit.

2. The ETX-D type LED railway signal bulb as described in claim 1, characterized in that, The housing includes an upper housing and a lower housing connected together. The upper housing has a channel, and the inner bottom surface of the channel has a through hole. The lower housing has a wiring groove. The LED point light source chip aluminum substrate and the circuit board are both disposed in the channel. The resistor module board and the inlet bolt terminal are both disposed on the lower housing. The lines of the resistor module board and the inlet bolt terminal pass through the wiring groove and the through hole and are electrically connected to the circuit board.

3. The ETX-D type LED railway signal bulb as described in claim 2, characterized in that, It also includes a heat sink and a heat sink cover, both of which are disposed on the upper housing. The heat sink and the heat sink cover cover each of the two ends of the channel. The LED point light source chip aluminum substrate and the circuit board are respectively disposed on the heat sink and the heat sink cover.

4. The ETX-D type LED railway signal bulb as described in claim 3, characterized in that, The heat sink has a plate-shaped groove, and the inner bottom surface of the plate-shaped groove has a through groove. The LED point light source chip aluminum substrate is disposed in the plate-shaped groove, and the LED lamp of the LED point light source chip aluminum substrate is directly opposite the through groove.

5. The ETX-D type LED railway signal bulb as described in claim 3, characterized in that, The heat dissipation cover is L-shaped, and an installation groove is provided on the inner surface of the L-shaped opening of the heat dissipation cover. One end of the heat dissipation cover extends into the channel and abuts against the heat dissipation plate. The circuit board is disposed in the installation groove.

6. The ETX-D type LED railway signal bulb as described in claim 4, characterized in that, It also includes a protective cover plate, which is disposed on the heat sink plate and has a light-transmitting hole that is directly opposite the channel.

7. The ETX-D type LED railway signal bulb as described in claim 2, characterized in that, The lower housing has a step on its side, the inlet bolt terminal is disposed on the step, a terminal protective shell is disposed on the step, and the terminal protective shell has a storage groove, in which the inlet bolt terminal is stored.

8. The ETX-D type LED railway signal bulb as described in claim 2, characterized in that, The bottom surface of the lower housing is provided with a recessed groove, the wiring groove is provided on the inner bottom surface of the recessed groove, and the resistor module board is disposed in the recessed groove.

9. The ETX-D type LED railway signal bulb as described in claim 8, characterized in that, The bottom surface of the lower housing is provided with a base, the base covers the sink groove, and the side of the base is provided with a fixing hook.

10. The ETX-D type LED railway signal bulb as described in claim 1, characterized in that, It also includes a nameplate, which is affixed to the housing.

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