Quick-release auxiliary device for heater and terminal strip

Abstract

The invention relates to the technical field of electrical equipment, in particular to a quick release auxiliary device for a heater and a terminal strip, which comprises a terminal strip body, a fixed clamping jaw, a movable clamping jaw and a locking mechanism, and a wire inlet terminal and a wire outlet terminal are arranged on the front side of the terminal strip body at an interval up and down. The terminal strip is reasonable and compact in structure, the terminal strip body adopts a standard interface, line connection is facilitated, the terminal strip body can be directly inserted into a pin guide rail, locking is performed through the rotary locking mechanism after insertion, connection stability and safety are ensured, the locking mechanism can ensure that a heater cannot be loosened due to vibration or other external force during working, and the service life of the heater is prolonged. According to the utility model, the structure is simple, the reliability of equipment is improved, when heaters need to be replaced, only the locking mechanism needs to be rotated, the terminal strip body is easily pulled out, the tedious steps in the dismounting process are reduced, the maintenance efficiency is improved, each terminal strip is connected with one heater, only the corresponding module needs to be replaced during replacement, and the replacement is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and is a quick-disassembly auxiliary device for a heater and a terminal block. Background Art

[0002] In an intelligent control cabinet, due to limitations in design and materials, existing heaters have a high failure rate, resulting in frequent replacements and long time consumption. The replacement process of traditional heaters is cumbersome, requiring the disassembly of multiple connecting components, increasing the workload and time cost of maintenance personnel. Therefore, there is an urgent need for a new type of auxiliary device to improve the replacement efficiency of heating devices and reduce the impact of failure rates. Summary of the Invention

[0003] The present invention provides a quick-disassembly auxiliary device for a heater and a terminal block, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems that the replacement process of traditional heaters is cumbersome, requires the disassembly of multiple connecting components, and increases the workload and time cost of maintenance personnel.

[0004] The technical solution of the present invention is realized by the following measures: A quick-disassembly auxiliary device for a heater and a terminal block includes a terminal block body, a fixed claw, a movable claw, and a locking mechanism. An incoming line terminal and an outgoing line terminal are arranged at intervals up and down on the front side of the terminal block body. The incoming line terminal includes a first connection terminal and a second connection terminal arranged at intervals left and right. The outgoing line terminal includes a third connection terminal corresponding to the first connection terminal one by one and a fourth connection terminal corresponding to the second connection terminal one by one. The third connection terminal and the fourth connection terminal are respectively connected to two wiring terminals of the heater. A fixed claw is fixedly installed on the rear side of the lower part of the terminal block body. A movable claw is slidably installed up and down along the vertical direction on the rear side of the upper part of the terminal block body corresponding to the position above the fixed claw. An installation through hole penetrating front and back is provided on the front side of the middle part of the terminal block body. A locking mechanism capable of moving the movable claw up and down after rotation is provided in the installation through hole. After the movable claw moves downward, it can be fixed to the DIN rail together with the fixed claw.

[0005] The following is a further optimization and / or improvement of the above-mentioned technical solution of the invention: The above locking mechanism may include an adjusting knob, an adjusting screw, a spring piece, a limiting frame and a retaining pin. The rear part of the adjusting knob is fixed with an adjusting screw screwed to the inner side of the front part of the installation channel. A spring piece detachably and fixedly installed together with the adjusting screw is arranged in the installation channel. The spring piece is in a U shape with an opening facing backward, and the length of the lower part of the spring piece is less than that of the upper part. The limiting frame is fixedly installed at the rear end of the upper part of the installation channel. The rear end of the upper part of the spring piece passes through the limiting frame and is fixedly installed together with the lower end of the movable claw. At least one card slot with an opening facing downward is arranged at intervals in the front and rear directions on the inner side of the rear part of the installation channel. A retaining pin is fixedly installed on the upper side of the front part of the spring piece. When the adjusting knob rotates, it can drive the spring piece to move back and forth so that the retaining pin is clamped in one of the card slots. When the spring piece moves back and forth, the movable claw moves up and down.

[0006] On the rear side of the terminal block body corresponding to the position above the installation through hole, a left guide rail and a right guide rail may be fixedly installed at intervals left and right. Left guide grooves and right guide grooves with opposite openings are respectively arranged on the right side of the left guide rail and the left side of the right guide rail. A slide plate slidably installed in the left guide groove and the right guide groove is fixedly installed on the front side of the movable claw. The lower side of the slide plate is fixedly installed together with the upper side of the spring piece slidably installed in the left guide groove and the right guide groove at the rear part.

[0007] A connecting through hole penetrating through the front and rear may be arranged on the front side of the above spring piece. The rear end of the adjusting screw is fixed with a connecting rod whose rear end passes through the connecting through hole. Two outer ring grooves are arranged at intervals in the front and rear on the outer side of the rear part of the connecting rod. A snap ring in contact with the outer side of the spring piece is clamped in each outer ring groove.

[0008] The cross section of the above limiting frame may be in a square frame shape, and the cross section of the rear part of the spring piece is rectangular.

[0009] Both the above movable claw and the fixed claw may be in an L shape.

[0010] An indicator light may be installed on the front side of the right part of the terminal block body corresponding to the position on the right side of the adjusting knob. The first end of the indicator light is electrically connected to the second connection terminal, and the second end of the indicator light is connected to the fourth connection terminal. A temperature controller is installed on the front side of the left part of the terminal block body corresponding to the position on the left side of the adjusting knob. The power supply terminals of the temperature controller are respectively electrically connected to the first connection terminal and the second connection terminal, and the control terminals of the temperature controller are respectively electrically connected to the third connection terminal and the fourth connection terminal.

[0011] The structure of the present invention is reasonable and compact. The terminal block body adopts a standardized interface, which is convenient for circuit connection. It can also be directly inserted into the DIN rail and locked by a rotary locking mechanism after insertion to ensure the stability and security of the connection. The locking mechanism can ensure that the heater will not loosen due to vibration or other external forces during operation, improving the reliability of the equipment. When the heater needs to be replaced, only the rotary locking mechanism needs to be rotated, and the terminal block body can be easily pulled out, reducing the cumbersome steps in the disassembly process and improving the maintenance efficiency. Each terminal block is connected to one heater, and only the corresponding module needs to be replaced during replacement, making the replacement more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG Figure 1 is a front view structural schematic diagram of Embodiments 1 to 7 of the present invention.

[0013] FIG Figure 2 is a right view structural schematic diagram of the terminal block body in Embodiments 1 to 7 of the present invention.

[0014] FIG Figure 3 is a top view structural schematic diagram of the terminal block body in Embodiments 1 to 7 of the present invention.

[0015] FIG Figure 4 is a right view cross-sectional structural schematic diagram of the terminal block body in Embodiments 1 to 7 of the present invention.

[0016] FIG Figure 5 is a right view cross-sectional structural schematic diagram of the latch being snapped into the card slot in the terminal block body in Embodiments 1 to 7 of the present invention.

[0017] FIG Figure 6 is FIG Figure 5 an enlarged structural schematic diagram of part A in FIG

[0018] FIG Figure 7 is a rear view structural schematic diagram of the terminal block body with the limit frame removed in Embodiments 2 to 7 of the present invention.

[0019] FIG Figure 8 is a front view structural schematic diagram of the connecting rod in Embodiments 4 to 7 of the present invention.

[0020] FIG Figure 9 is a circuit structural schematic diagram of Embodiment 7 of the present invention.

[0021] The codes in the attached drawings are as follows: 1 is the terminal block body, 2 is the fixed claw, 3 is the movable claw, 4 is the first connection terminal, 5 is the second connection terminal, 6 is the third connection terminal, 7 is the fourth connection terminal, 8 is the adjustment knob, 9 is the adjustment screw, 10 is the elastic piece, 11 is the limit frame, 12 is the retaining pin, 13 is the card slot, 14 is the left guide rail, 15 is the right guide rail, 16 is the left guide groove, 17 is the slide plate, 18 is the connecting rod, 19 is the outer ring groove, 20 is the snap ring, 21 is the temperature controller, 22 is the indicator light, and 23 is the heater. Specific Embodiment

[0022] The present invention is not limited by the following embodiments, and the specific implementation manner can be determined according to the technical solution of the present invention and the actual situation.

[0023] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the layout mode of the attached drawings of the specification. For example, the position relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 The layout direction of the attached drawings of the specification. Figure 1 is used to determine.

[0024] The present invention will be further described below in conjunction with the embodiments and the attached drawings: Embodiment 1: As shown in Figure 1 、 2 , the quick-release auxiliary device of the heater and the terminal block includes a terminal block body 1, a fixed claw 2, a movable claw 3 and a locking mechanism. The front side of the terminal block body 1 is provided with an incoming line terminal and an outgoing line terminal at intervals up and down. The incoming line terminal includes a first connection terminal 4 and a second connection terminal 5 arranged at intervals left and right. The outgoing line terminal includes a third connection terminal 6 corresponding to the first connection terminal 4 one by one and a fourth connection terminal 7 corresponding to the second connection terminal 5 one by one. The third connection terminal 6 and the fourth connection terminal 7 are respectively connected to the two wiring ends of the heater 23. The lower rear side of the terminal block body 1 is fixedly installed with a fixed claw 2. The upper rear side of the terminal block body 1 at a position corresponding to the upper side of the fixed claw 2 is slidably installed with a movable claw 3 in the vertical direction. The front side of the middle part of the terminal block body 1 is provided with an installation through hole penetrating from front to back. The installation through hole is provided with a locking mechanism that can make the movable claw 3 move up and down after rotation. After the movable claw 3 moves downward, it can be fixed to the din rail together with the fixed claw 2.

[0025] According to requirements, the material of the terminal block body 1 is a well-known insulating material in the prior art, such as polycarbonate or nylon in engineering plastics, and the heater 23 is a well-known technology in the prior art, such as a heating rod or an electric heating wire. During use, the terminal block body 1 adopts a standardized interface, which is convenient for circuit connection and can also be directly inserted onto the DIN rail. After insertion, it is locked by a rotary locking mechanism to ensure the stability and safety of the connection. The locking mechanism can ensure that the heater 23 will not become loose due to vibration or other external forces during operation, improving the reliability of the equipment. When the heater 23 needs to be replaced, only the rotary locking mechanism needs to be rotated, and the terminal block body 1 can be easily pulled out, reducing the cumbersome steps during disassembly and improving the maintenance efficiency. Each terminal block is connected to a heater 23, and only the corresponding module needs to be replaced during replacement, making the replacement more convenient.

[0026] According to actual needs, the quick-release auxiliary device for the above-mentioned heater and terminal block can be further optimized and / or improved: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figures 1 to 7 figure, the locking mechanism includes an adjustment knob 8, an adjustment screw 9, a spring piece 10, a limit frame 11 and a retaining pin 12. The rear part of the adjustment knob 8 is fixed with an adjustment screw 9 screwed to the inner side of the front part of the installation channel. A spring piece 10 detachably and fixedly installed together with the adjustment screw 9 is arranged in the installation channel. The spring piece 10 is in a U shape with an opening facing backward, and the length of the lower part of the spring piece 10 is less than the length of the upper part of the spring piece 10. The upper rear end of the installation channel is fixedly installed with a limit frame 11. The upper rear end of the spring piece 10 passes through the limit frame 11 and is fixedly installed together with the lower end of the movable claw 3. At least one downward-opening slot 13 is arranged at intervals in the front and rear of the inner side of the rear part of the installation channel. A retaining pin 12 is fixedly installed on the upper side of the front part of the spring piece 10. When the adjustment knob 8 rotates, it can drive the spring piece 10 to move back and forth so that the retaining pin 12 is clamped in one of the slots 13, and when the spring piece 10 moves back and forth, the movable claw 3 moves up and down.

[0027] According to requirements, the elastic piece 10 is a known prior art, such as a stainless steel elastic piece 10. During use, by adjusting the setting of the adjusting knob 8, it is convenient to adjust the rotation of the adjusting screw 9, thereby converting the rotational motion of the adjusting screw 9 into a linear reciprocating motion of the elastic piece 10. The linear reciprocating motion of the elastic piece 10 can cause the movable claw 3 to move up and down. The length of the lower part of the elastic piece 10 is less than the length of the upper part of the elastic piece 10. In this way, when the upper part of the elastic piece 10 moves back and forth, it can avoid the situation that the lower part of the elastic piece 10 moves backward and abuts against the DIN rail, which affects the installation of the quick-release auxiliary device for the heater and the terminal block. There are 1 to 3 downward-opening clamping grooves 13 arranged at intervals in the front-back direction on the inner side of the rear part of the installation channel. After the pin 12 moves, it can be bounced up by the elastic piece 10 so that the pin 12 is stuck in the clamping groove 13. The cross-sections of both the clamping groove 13 and the pin 12 are circular, and the upper end of the pin 12 has an arc chamfer. In this way, after the movable claw 3 and the fixed claw 2 are clamped on the DIN rail, it can prevent the elastic piece 10 from moving backward due to the inadvertent movement of the adjusting knob 8, which may cause the movable claw 3 to move upward and loosen from the DIN rail, resulting in a malfunction. When disassembly is required, only by increasing the torque of the adjusting knob 8 can the pin 12 be separated from the clamping groove 13. To prevent the separation of the pin 12 from the clamping groove 13 from being difficult, the height of the pin 12 and the depth of the clamping groove 13 are both not greater than 3 mm. By setting multiple downward-opening clamping grooves 13, the movable claw 3 can be positioned at different positions, so as to be installed together with DIN rails of different widths, and the applicable range is wider.

[0028] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 4 , 5 , 7, on the left and right sides of the rear side of the terminal block body 1 corresponding to the position above the installation through hole, a left guide rail 14 and a right guide rail 15 are fixedly installed at intervals. On the right side of the left guide rail 14 and on the left side of the right guide rail 15, left guide grooves 16 and right guide grooves with opposite openings are respectively provided. A slide plate 17 slidably installed in the left guide groove 16 and the right guide groove is fixedly installed on the front side of the movable claw 3. The lower side of the slide plate 17 is fixedly installed together with the upper side of the elastic piece 10 slidably installed in the left guide groove 16 and the right guide groove at the rear.

[0029] According to requirements, the left guide rail 14 is a U-shaped frame with an opening to the right, the right guide rail 15 is a U-shaped frame with an opening to the left, the left guide rail 14 and the right guide rail 15 are integrally provided with the terminal block body 1, the slide plate 17 is T-shaped with a wider front and a narrower rear, and there is an arc transition between the inner wall of the lower part of the left guide groove 16, the inner wall of the lower part of the right guide groove and the inner wall of the rear end of the installation through hole. In this way, when the rear end of the elastic piece 10 moves, the deformation amount is smaller, and the service life of the elastic piece 10 can be extended.

[0030] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figures 4 to 8As shown in the figure, a connecting through hole penetrating from front to back is provided on the front side of the elastic piece 10. A connecting rod 18 with its rear end fixed to the rear end of the adjusting screw rod 9 and passing through the connecting through hole is provided. Two outer ring grooves 19 are arranged at intervals in the front and back on the outer side of the rear part of the connecting rod 18. A snap spring 20 that contacts the outer side of the elastic piece 10 is clamped in each outer ring groove 19.

[0031] According to requirements, the snap spring 20 is a known prior art, such as an open retaining ring. During use, by providing the connecting rod 18 and the snap spring 20, it is convenient to detachably install the adjusting screw rod 9 and the elastic piece 10 together. In this way, when the adjusting screw rod 9 rotates, the elastic piece 10 can be prevented from rotating together with the adjusting screw rod 9. The rotation of the adjusting screw rod 9 can cause the elastic piece 10 to move back and forth in the installation through hole. When the elastic piece 10 moves back and forth in the installation through hole, the movable claw 3 can move up and down. Specifically, when the adjusting knob 8 and the adjusting screw rod 9 rotate clockwise, the elastic piece 10 moves forward, and the pin 12 is stuck in the slot 13. After the movable claw 3 moves downward, it is stuck on both side edges of the din rail with the fixed claw 2 and finally fixedly installed with the din rail. In this way, the disassembly and assembly between the adjusting screw rod 9 and the elastic piece 10 can be made more convenient and easier to maintain. When the adjusting knob 8 and the adjusting screw rod 9 rotate counterclockwise, the elastic piece 10 moves backward, and the pin 12 is separated from the slot 13. After the movable claw 3 moves upward, the distance between it and the fixed claw 2 increases, and finally it is separated from the din rail.

[0032] Embodiment Five: As an optimization of the above embodiment, as shown in the attached Figure 4 、 5 figure, the cross-section of the limiting frame 11 is in a shape of a Chinese character 'hui', and the cross-section of the rear part of the elastic piece 10 is rectangular.

[0033] According to requirements, the installation through hole includes a threaded hole section and a square hole section that are connected in sequence from front to back. The adjusting screw rod 9 is screwed in the threaded hole section, and the front part of the elastic piece 10 is installed in the square hole section. During use, the cross-section of the limiting frame 11 is in a shape of a Chinese character 'hui'. The front side of the limiting frame 11 can limit the lower rear end of the elastic piece 10. The outer contour of the limiting frame 11 matches the square hole section. The cross-section of the rear part of the elastic piece 10 is rectangular, which is convenient for the manufacture of the elastic piece 10 and the connection between the elastic piece 10, the connecting rod 18, and the movable claw 3.

[0034] Embodiment Six: As an optimization of the above embodiment, as shown in the attached Figure 2 、 4 Figure 5, both the movable claw 3 and the fixed claw 2 are in an L shape.

[0035] According to requirements, after the rear end of the fixed jaw 2 is bent upward, it forms an L shape. The lower side surface of the fixed jaw 2 is an inclined surface where the front part slopes downward relative to the rear part. After the rear end of the movable jaw 3 is bent downward, it forms an L shape. The upper side surface of the movable jaw 3 is an inclined surface where the front part slopes upward relative to the rear part. This can ensure the strength of the movable jaw 3 and the fixed jaw 2, and also improve the aesthetics.

[0036] Embodiment Seven: As an optimization of the above embodiment, as shown in the attached Figures 1 to 3 Figures 6 and 7, an indicator light 22 is installed on the front side of the right part of the terminal block body 1 corresponding to the right side position of the adjusting knob 8. The first end of the indicator light 22 is electrically connected to the second connection terminal 5, and the second end of the indicator light 22 is connected to the fourth connection terminal 7. A temperature controller 21 is installed on the front side of the left part of the terminal block body 1 corresponding to the left side position of the adjusting knob 8. The power supply terminals of the temperature controller 21 are respectively electrically connected to the first connection terminal 4 and the second connection terminal 5, and the control terminals of the temperature controller 21 are respectively electrically connected to the third connection terminal 6 and the fourth connection terminal 7.

[0037] During use, by setting the indicator light 22, the working state of the heater 23 can be monitored in real time, and faults can be detected and processed in a timely manner. When the temperature of the heater 23 is abnormal or a fault occurs, the indicator light 22 goes out, prompting the maintenance personnel to handle it. The temperature controller 21 can be a known prior art, such as a GZS-15 gear temperature control knob. This can adjust the heating power of the heater 23, which is convenient to adjust, improves the replacement efficiency of the heater 23 in practical applications, reduces the maintenance cost, and improves the overall reliability of the intelligent control cabinet.

[0038] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and the best implementation effects. Non-essential technical features can be added or subtracted according to actual needs to meet the requirements of different situations.

Claims

1. A quick-release auxiliary device for a heater and a terminal block, characterized in that It includes a terminal block body, fixed claws, movable claws and a locking mechanism. On the front side of the terminal block body, an incoming line terminal and an outgoing line terminal are arranged at intervals up and down. The incoming line terminal includes a first connection terminal and a second connection terminal arranged at intervals left and right. The outgoing line terminal includes a third connection terminal corresponding to the first connection terminal one by one and a fourth connection terminal corresponding to the second connection terminal one by one. The third connection terminal and the fourth connection terminal are respectively connected to two wiring ends of the heater. A fixed claw is fixedly installed at the rear side of the lower part of the terminal block body. At the rear side of the upper part of the terminal block body corresponding to the position above the fixed claw, a movable claw is slidably installed up and down. An installation through hole penetrating from front to back is provided at the front side of the middle part of the terminal block body. A locking mechanism capable of moving the movable claw up and down after rotation is provided in the installation through hole. After the movable claw moves downward, it can be fixed on the DIN rail together with the fixed claw.

2. The quick-release auxiliary device for a heater and a terminal block according to claim 1, characterized in that The locking mechanism includes an adjustment knob, an adjustment screw, a spring piece, a limit frame and a pin. The adjustment screw screwed to the inner side of the front part of the installation channel is fixed to the rear part of the adjustment knob. A spring piece detachably and fixedly installed together with the adjustment screw at the front side is provided in the installation channel. The spring piece is in a U shape with an opening facing backward and the length of the lower part of the spring piece is less than the length of the upper part of the spring piece. A limit frame is fixedly installed at the rear end of the upper part of the installation channel. The rear end of the upper part of the spring piece passes through the limit frame and is fixedly installed together with the lower end of the movable claw. At least one downward-opening card slot is provided at intervals front and back on the inner side of the rear part of the installation channel. A pin is fixedly installed on the upper side of the front part of the spring piece. When the adjustment knob rotates, it can drive the spring piece to move back and forth so that the pin is clamped in one of the card slots. When the spring piece moves back and forth, the movable claw moves up and down.

3. The quick-release auxiliary device for the heater and the terminal block according to claim 2, characterized in that On the rear side of the terminal block body corresponding to the position above the installation through hole, a left rail and a right rail are fixedly installed at intervals left and right. Left guide grooves and right guide grooves with opposite openings are respectively provided on the right side of the left rail and the left side of the right rail. A slide plate slidably installed in the left guide groove and the right guide groove is fixedly installed on the front side of the movable claw. The lower side of the slide plate is fixedly installed together with the upper side of the spring piece slidably installed in the left guide groove and the right guide groove at the rear part.

4. The quick-release auxiliary device for a heater and a terminal block according to claim 2 or 3, characterized in that A connection through hole penetrating from front to back is provided on the front side of the spring piece. A connecting rod with the rear end passing through the connection through hole is fixed to the rear end of the adjustment screw. Two outer ring grooves are provided at intervals front and back on the outer side of the rear part of the connecting rod. A snap ring in contact with the outer side of the spring piece is clamped in each outer ring groove; Or / and, the cross section of the limit frame is in a shape of a Chinese character 'hui', and the cross section of the rear part of the spring piece is rectangular.

5. The quick-release auxiliary device for a heater and a terminal block according to claim 1 or 2 or 3, characterized in that Both the movable claw and the fixed claw are in an L shape.

6. The quick-disassembly auxiliary device for a heater and a terminal block according to claim 4, characterized in that Both the movable claw and the fixed claw are in an L shape.

7. The quick-disassembly auxiliary device for a heater and a terminal block according to claim 2 or 3 or 6, characterized in that An indicator lamp is installed on the front side of the right part of the terminal block body corresponding to the right side of the adjustment knob. The first end of the indicator lamp is electrically connected to the second connection terminal, and the second end of the indicator lamp is connected to the fourth connection terminal. A temperature controller is installed on the front side of the left part of the terminal block body corresponding to the left side of the adjustment knob. The power supply end of the temperature controller is electrically connected to the first connection terminal and the second connection terminal respectively, and the control end of the temperature controller is electrically connected to the third connection terminal and the fourth connection terminal respectively.

8. The quick-release auxiliary device for a heater and a terminal block according to claim 4, wherein An indicator light is installed on the front side of the right part of the terminal block body corresponding to the right position of the adjustment knob. The first end of the indicator light is electrically connected to the second connection terminal, and the second end of the indicator light is connected to the fourth connection terminal. A temperature controller is installed on the front side of the left part of the terminal block body corresponding to the left position of the adjustment knob. The power supply terminals of the temperature controller are respectively electrically connected to the first connection terminal and the second connection terminal, and the control terminals of the temperature controller are respectively electrically connected to the third connection terminal and the fourth connection terminal.

9. The quick-disassembly auxiliary device for a heater and a terminal block according to claim 5, characterized in that An indicator light is installed on the front side of the right part of the terminal block body corresponding to the right position of the adjustment knob. The first end of the indicator light is electrically connected to the second connection terminal, and the second end of the indicator light is connected to the fourth connection terminal. A temperature controller is installed on the front side of the left part of the terminal block body corresponding to the left position of the adjustment knob. The power supply terminals of the temperature controller are respectively electrically connected to the first connection terminal and the second connection terminal, and the control terminals of the temperature controller are respectively electrically connected to the third connection terminal and the fourth connection terminal.

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