Detachable integrated power distribution system

Abstract

A detachable integrated power distribution system. The system comprises: a segmented bus duct (10), wherein the segmented bus duct (10) comprises a plurality of bus duct segments (11), and the the segmented bus duct (10) is electrically connected to bus duct electric connectors (20), a step-by-step power-taking apparatus (30) and a power distribution device; a plurality of bus duct electric connectors (20), which connect the plurality of bus duct segments (11) into a whole; and the step-by-step power-taking apparatus (30), which is inserted into the bus duct segments (11), wherein the step-by-step power-taking apparatus (30) is provided with a main box body (31), a clamping mechanism (32), a step-by-step power-taking mechanism (33) and a control mechanism (34), the step-by-step power-taking apparatus (30) is clamped with the bus duct segments (11) by means of the clamping mechanism (32), and is connected to the bus duct segments (11) by means of the step-by-step power-taking mechanism (33) to take power, and the step-by-step power-taking apparatus (30) is electrically connected to a PDU device by means of a plurality of power sockets (41) or industrial electric connectors (42) for power supply output.

Description

Detachable integrated power distribution system

Technical field

[0001] The present invention relates to a power distribution system for distributing power to equipment such as PDUs, and in particular to a detachable integrated power distribution system that plugs multiple bus ducts into one and can draw power in steps. [Background Technology]

[0002] Busbar trunk distribution devices, or bus ducts, are widely used in the power distribution systems of low-voltage complete switchgear and control equipment. They are used to replace cables and wires to distribute power to electrical equipment loads such as high-rise buildings, factories, IDC (Internet Data Center) rooms, and PDUs (Power Distribution Units). Existing bus ducts are a new type of conductor formed by using copper or aluminum as conductors, supported by insulators, and then installed in a metal trough. They have become an indispensable wiring method in power systems. In actual applications, due to the different application environments and objects of bus ducts, the layout length of bus ducts also varies, so the bus ducts need to be connected in sections. However, although some people have proposed certain connection structures that can be used to connect bus ducts, due to reasons such as complex structures, it is impossible to achieve rapid connection of bus ducts, and the reliability and safety of the connection are insufficient.

[0003] [Summary of the invention]

[0004] The present invention aims to solve the above problems and provide a detachable integrated power distribution system that can easily and quickly connect multiple sections of bus duct into one, and can easily and quickly connect the step-by-step power supply mechanism to the bus duct to obtain power through a snap-on method. The power transmitted by the bus duct can be distributed to electrical equipment in a variety of ways. It is not only reliable in connection but also safe to use.

[0005] To achieve the above objectives, the present invention provides a detachable integrated power distribution system, which includes:

[0006] The segmented bus duct includes multiple sections of bus duct, which are electrically connected to the bus duct electrical connector, the step-by-step power supply device and the power distribution equipment respectively;

[0007] Multiple bus duct electrical connectors, which connect multiple sections of bus duct into one;

[0008] The step-by-step power taking device is plugged into the bus duct. The step-by-step power taking device is provided with a main box, a clamping mechanism, a step-by-step power taking mechanism and a control mechanism. The step-by-step power taking device is clamped with the bus duct through the clamping mechanism and connected to the bus duct through the step-by-step power taking mechanism to take power. The step-by-step power taking device is electrically connected to the PDU device through multiple power sockets or industrial electrical connectors for power output, and

[0009] The system connects multiple sections of bus ducts into one detachable whole and conducts them, and a step-by-step power supply device for step-by-step power supply and safety control is integrated on the bus duct.

[0010] Each section of the segmented bus duct is provided with a trough body with open ends and a bottom. A convex edge for connecting to the clamping mechanism is provided on the outside of the trough body along the length direction. Several insulating sheaths are arranged at intervals in the width direction inside the trough body. A first conductive plate is provided in each insulating sheath. Multiple first conductive plates are arranged into a first conductive plate group. The two ends of each first conductive plate extend from the two ends of the insulating sheath. The ends of each section of the bus duct are respectively provided with end covers connected to the bus duct electrical connector.

[0011] The trough body is made of aluminum alloy material, the insulating sheath is made of fire-resistant and flame-retardant insulating material, and the first conductive plate is a strip-shaped copper plate.

[0012] The bus duct electrical connector is provided with a plurality of insulating partitions, which are arranged at intervals along the width direction of the bus duct electrical connector. A second conductive plate is provided on each opposite side of each pair of adjacent insulating partitions. Multiple second conductive plates are arranged into a second conductive plate group. The gap between adjacent second conductive plates corresponds to the thickness of the first conductive plate. A metal spring is provided in the middle of each pair of adjacent second conductive plates, and the metal spring is respectively connected to the second conductive plates located on both sides thereof. The outside of each bus duct electrical connector is clamped with an upper and lower protective shell. The plurality of insulating partitions, the plurality of second conductive plates, and the plurality of metal springs are connected as a whole by a screw passing through the center thereof and a nut connected to the end of the screw.

[0013] The protective shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixed at both side edges by screws.

[0014] The insulating partition is made of heat-resistant, corrosion-resistant and aging-resistant insulating material. Among the several insulating partitions of the busbar duct electrical connector, the insulating partitions located at both ends are flat plates with a screw hole in the center. Rectangular recesses for accommodating the second conductive plate are provided on both sides of each insulating partition located between the insulating partitions at the two ends. A first connecting protrusion with a connecting hole is provided in the center of the rectangular recess on one side, and a second connecting protrusion with a hole that can accommodate the first connecting protrusion on the opposite side is provided in the center of the rectangular recess on the other side.

[0015] The metal spring includes a connecting portion and an elastic support portion, wherein the connecting portion is rectangular and is provided with a connecting hole matching the shape of the first connecting protrusion, and the elastic support portion includes two arc-shaped supporting feet located on the outside of the connecting portion, and the two ends of the two supporting feet extend outward beyond the connecting portion, and their ends have a reverse bend and their ends pass through the second conductive plate in contact with them.

[0016] Two second conductive plates and metal springs located between adjacent insulating partitions are sleeved on the first connecting protrusion on one side of the insulating partition, and the first connecting protrusion is inserted into the inner hole of the second connecting protrusion of the insulating partition on the opposite side, so that several insulating partitions, several second conductive plates, and several metal springs are connected in sequence.

[0017] The step-by-step power supply mechanism and control mechanism are provided in the main box of the step-by-step power supply device. A concealed power socket for connecting to the PDU device is provided on the front panel of the main box, which is hidden behind the openable and closable outer cover. A window is provided on the top of the main box for the upper end of the step-by-step power supply mechanism to extend out, and a hole is provided on the side of the main box for the operating handle of the step-by-step power supply mechanism to extend out.

[0018] The clamping mechanism of the step-by-step power-taking device is provided with two clamping boxes, which are symmetrically fixed to the upper ends of both sides of the main box body, and the clamping boxes are provided with a first claw groove, a second claw groove and a spring groove. Each clamping box is symmetrically provided with a retractable first claw and a second claw on both sides along the width direction, the first claw and the second claw are respectively connected to the first return spring, and a first limiting protrusion is respectively provided on the first claw and the second claw, and a first clamping claw opening and closing key and a second clamping claw opening and closing key that can be moved laterally are symmetrically provided at the lower part of the clamping box, and a first guide groove and a second guide groove are respectively provided on the first claw opening and closing key and the second claw opening and closing key, and a vertically movable clamping claw release button is provided on both sides of the clamping box, and the clamping claw release button is provided with a second limiting protrusion that cooperates with the first limiting protrusion on the clamping claw arm to limit the position.

[0019] The first claw and the second claw are respectively arranged in the first claw groove and the second claw groove in the two card connection boxes, the first return spring is arranged in the spring groove, the first claw and the second claw are in an inverted L-shape, one end of which is formed with a longitudinal protrusion and a transverse protrusion that turn at a right angle, the longitudinal protrusion is respectively inserted into the first guide groove and the second guide groove on the first claw opening and closing key and the second claw opening and closing key, the length of the first guide groove and the second guide groove is greater than the length of the longitudinal protrusion of the first claw and the second claw, so that the longitudinal protrusion can move in the first guide groove and the second guide groove to push the first claw and the second claw to move, the two transverse protrusions are located at both ends of the spring groove, the two ends of the first return spring are connected to the two transverse protrusions, the free ends of the first claw and the second claw extend out of the card connection box, and the ends thereof are provided with a hook that turns inward, and the first limiting protrusion is arranged on the claw arm.

[0020] The first claw opening and closing key and the second claw opening and closing key are symmetrically arranged in the notches on both sides of the lower part of the card box, separated by a partition in the middle, and a second return spring is installed in the spring hole on the partition, and the two ends of the second return spring are respectively connected to the first claw opening and closing key and the second claw opening and closing key. When the first claw opening and closing key is pushed inward, the first claw and the second claw are opened outward, and the first claw and the second claw are placed on the convex edge of the busbar trough and the first claw opening and closing key and the second claw opening and closing key are released, so that the hook can be locked on the convex edge.

[0021] The step-by-step power taking mechanism of the step-by-step power taking device is arranged at an upper part of one side of the main box body, and includes a power taking part for connecting to the bus duct and an operating part for performing power taking operations.

[0022] The power taking part is provided with an electrical connection plate group corresponding to the first conductive plate group in the bus duct. Each electrical connection plate of the electrical connection plate group is connected to multiple insulators, and its upper end extends out of the main box body. The electrical connection plate group and multiple insulators are arranged on a fixed seat, and the fixed seat is fixed on a bracket connected to the main box body.

[0023] The operating part is connected to the lower side of the power taking part, and is provided with a connecting rod mechanism that drives the power taking part to move up and down. The connecting rod mechanism is connected to a connecting seat fixed to the side wall of the main box body. The input end of the connecting rod mechanism is connected to the operating handle. The main body of the operating handle extends to the outside of the main box body. The output end of the connecting rod mechanism is connected to a vertical lifting rod. The upper end of the lifting rod is fixed to the bracket. Two guide columns are fixed on the bracket. The two guide columns enter the bracket upward. The bracket can move up and down along the two guide columns under the action of the lifting rod to connect or disconnect the electrical connection plate group and the first conductive plate group in the bus duct to take power.

[0024] The connecting rod mechanism includes an active connecting rod and two pairs of driven connecting rods, wherein the active connecting rod has three arms, the first arm of which is hinged to the operating handle and rotates around a first pin fixed to the side wall of the connecting seat, the second arm is placed in a limiting groove at the top of the connecting seat, and the end of the third arm is hinged to the two pairs of driven connecting rods through a second pin, one end of the driven connecting rod is hinged to the third pin, and the other end of the driven connecting rod is hinged to the lifting rod of the operating part. When the operating handle is pressed down or lifted, the connecting rod mechanism pushes the lifting rod to move up and down, so that the electrical connection plate group of the power-taking mechanism is plugged into or disconnected from the first conductive plate group in the bus duct to take power.

[0025] The control mechanism of the step-by-step power supply device includes a control unit, a power supply unit, an output unit and a monitoring module, wherein the monitoring module integrates a switching power supply, a current acquisition unit, a voltage acquisition unit, a monitoring unit, a communication interface unit and a display screen. The control unit is a circuit breaker, on which the power supply unit and the output unit are connected. The power supply unit is electrically connected to the power supply part of the step-by-step power supply mechanism, and the output unit is electrically connected to the power socket or the industrial electrical connector. A switching power supply is connected between the power supply unit and the control unit, and a current acquisition unit and a voltage acquisition unit are connected between the control unit and the output unit. The current acquisition unit and the voltage acquisition unit are respectively electrically connected to the power supply part of the step-by-step power supply mechanism, and the current acquisition unit and the voltage acquisition unit are also respectively connected to the monitoring unit. The monitoring unit is a single-chip microcomputer, which is respectively connected to the switching power supply, the communication interface unit and the display screen.

[0026] The contribution of the present invention is that it effectively solves the problem of fast and reliable connection of segmented bus ducts in bus duct type power distribution systems. The present invention can quickly and conveniently connect multiple sections of bus ducts into one by providing a connector that matches the bus duct, and make each conductor conductive. For the output of electricity transmitted through the bus duct, the present invention provides a step-by-step power extraction device, which can quickly extract electricity and output it to the terminal electrical equipment by quickly snapping into the bus duct and its conductive components. The control mechanism of the present invention can monitor the current, voltage and other data of each conductor in real time, thereby ensuring safety of use. The system of the present invention can make the setting of bus duct type power distribution facilities simpler and faster, more efficient and safer to use.

Brief Description of the Drawings

[0027] FIG1 is a perspective schematic diagram of the overall structure of the present invention, wherein FIG1A is a perspective schematic diagram of an output end being a power socket, and FIG1B is a perspective schematic diagram of an output end being an industrial electrical connector.

[0028] FIG2 is an exploded perspective schematic diagram of the overall structural components of the present invention, wherein FIG2A is an exploded schematic diagram of the components with the output end being a power socket, and FIG2B is a schematic diagram of the output end being an industrial electrical connector.

[0029] Figure 3 is a schematic diagram of the bus duct structure of the present invention, wherein Figure 3A is a stereoscopic schematic diagram, Figure 3B is a stereoscopic schematic diagram of component decomposition, Figure 3C is a stereoscopic schematic diagram of the bus duct body structure, and Figure 3D is a stereoscopic schematic diagram of the bus duct insulation sheath.

[0030] Figure 4 is a schematic diagram of the structure of the bus duct electrical connector of the present invention, wherein Figure 4A is a stereoscopic schematic diagram, Figure 4B is a stereoscopic schematic diagram of the component decomposition structure, Figure 4C is a stereoscopic schematic diagram of the component decomposition structure on the other side, Figure 4D is a structural sectional view, and Figure 4E is a schematic diagram of the connection state of the bus duct electrical connector and the bus duct with the upper cover removed.

[0031] Figure 5 is a schematic diagram of the structure of the step-by-step power-taking device of the present invention, wherein Figure 5A is a three-dimensional schematic diagram of the overall structure, Figure 5B is a three-dimensional schematic diagram of the decomposed components, Figure 5C is a cross-sectional view of the structure, Figure 5D is a three-dimensional schematic diagram of the decomposed upper components of the clamping mechanism, Figure 5E is a three-dimensional schematic diagram of the decomposed lower components of the clamping mechanism, Figure 5F is a three-dimensional schematic diagram of the clamping mechanism with the upper cover removed, Figure 5G is a three-dimensional schematic diagram of the clamping claw release button, Figure 5H is a schematic diagram of the clamping claw in an open state, Figure 5I is a schematic diagram of the clamping claw in a retracted state, Figure 5J is a three-dimensional schematic diagram of the step-by-step power-taking mechanism, Figure 5K is a three-dimensional schematic diagram of the decomposed components of the step-by-step power-taking mechanism, Figure 5L is a decomposed view of the power-taking part, Figure 5M is a decomposed view of the operating part, Figure 5N is a cross-sectional view of the operating part structure, and Figure 5O is a circuit block diagram of the control mechanism. [Specific implementation method]

[0032] The following examples are provided to further explain and illustrate the present invention and do not constitute any limitation to the present invention.

[0033] Referring to Figures 1 and 2, the present invention's detachable integrated power distribution system includes a segmented bus duct 10, multiple bus duct electrical connectors 20, and a step-by-step power extraction device 30. The multiple bus duct segments 11 of the segmented bus duct are connected together via multiple bus duct electrical connectors 20. The step-by-step power extraction device 30 is clipped onto the bus duct and is used to distribute and safely control power transmission and output within the bus duct. The present invention will be described in more detail below with reference to the accompanying drawings.

[0034] As shown in Figures 3A to 3D, the segmented bus duct 10 is divided into multiple bus duct sections 11 according to the design and connection length requirements. The segmented bus duct 10 is connected as a whole by a bus duct electrical connector 20. Its input end is electrically connected to the power distribution input device. The bus duct is clamped with a step-by-step power extraction device 30 for realizing the step-by-step power extraction function of clamping and extracting power, monitoring the power transmission process of the bus duct, and collecting, transmitting, and displaying data on the current and voltage of the bus duct conductors. The output end of the segmented bus duct 10 can be equipped with different power output connection devices. In the embodiment shown in Figures 1A and 2A, the step-by-step power extraction device 30 provided on one side of the output end of the bus duct is provided with a plurality of power sockets 41 for power output. In this embodiment, the power sockets 41 are concealed power sockets. The plurality of power sockets 41 are provided on the front panel of the main box 31 and are used to connect terminal electrical equipment such as PDUs. They are hidden behind the retractable outer cover 311. 1B and 2B , a plurality of industrial electrical connectors 42 for power output are provided on the step-by-step power extraction device 30. The user can select the appropriate power socket 41 or industrial electrical connector 42 according to their needs.

[0035] As shown in Figures 3A to 3D , each bus duct segment 11 of the segmented bus duct 10 comprises a trough body 111 with open ends and a bottom. As shown in Figure 3C , the trough body 111 is made of aluminum alloy. A first conductive plate assembly 113A within the bus duct extends from the two open ends of the trough body 111 and connects to the bus duct electrical connector 20 . The open bottom of the trough body 111 is used to electrically connect the first conductive plate assembly 113A within the trough body 111 to the electrical connection plate assembly 331A of the step-by-step power extraction device 30 . Lugs 1111 are provided along the length of the outer sides of the trough body 111 for connection to the latching mechanism 32 . Several vertical partitions 1112 are provided along the width of the trough body 111. The upper ends of the vertical partitions 1112 are connected to the top of the trough body 111. Three inwardly projecting inner steps 11121 are spaced apart on one sidewall of each vertical partition 1112, extending from one end of the vertical partition to the other. An insulating sheath 112 is provided in the cavity formed by each two adjacent vertical partitions 1112. As shown in FIG3D , the insulating sheath 112 is a sleeve-shaped body with an open bottom. An arc-shaped groove 1121 folded inward is provided at the lower end of the insulating sheath, which is used to place the first conductive plate 113. The end of the insulating sheath expands outward to facilitate the introduction of the electrical connection plate group 331A of the step-by-step power supply device. A limit baffle 1122 extending from one end to the other is connected to the edge of the arc-shaped groove 1121 at the top of the insulating sheath. One of the outer sides of the insulating sheath is provided with an outwardly protruding outer step 1123. The insulating sheath 112 is made of fire-retardant insulating material. The insulating sheath 112 is supported on the inner step 11121 of the vertical partition 1112 by its outer step 1123. Each insulating sheath 112 is provided with a first conductive plate 113, with the upper and lower ends of the first conductive plate 113 being limited by the limiting baffle 1122 and the arcuate slot 1121, respectively. The first conductive plate 113 is a strip of copper plate, and its input end is electrically connected to an external power distribution device, such as a distribution cabinet. Multiple first conductive plates 113 are arranged into a first conductive plate group 113A. Each end of the bus duct 11 is provided with an end cap 114, which is provided with a number of slots 1141 for the ends of the first conductive plate group 113A to extend. The ends of each first conductive plate 113 extend from the ends of the insulating sheath 112 and the end cap 1141, respectively, to facilitate connection with another bus duct electrical connector 20.

[0036] The multiple bus duct sections 11 of the segmented bus duct 10 are connected together via a plurality of bus duct electrical connectors 20. Specifically, as shown in Figures 4A to 4D, the bus duct electrical connector 20 is provided with a plurality of rectangular insulating partitions 21 made of high-strength thermosetting insulating plastic that is heat-resistant, corrosion-resistant, and aging-resistant. Among the several insulating partitions 21 of the bus duct electrical connector, the insulating partitions 21 located at the two ends are flat plates with screw holes 214 in their centers. Rectangular recesses 211 are provided on both sides of each insulating partition 21 located between the two end portions for accommodating the second conductive plate 22. A rectangular block-shaped first connecting protrusion 212 is provided in the center of one of the rectangular recesses for connecting the second conductive plate 22 and the metal spring 23. A first connecting hole 2121 is provided in the center of the first connecting protrusion 212. A rectangular, block-shaped second connection protrusion 213 is located in the center of the rectangular recess on the other side of the insulating partition 21. This protrusion is used to accommodate the first connection protrusion 212 on the opposite side. A hole 2131 is located in the center of the second connection protrusion 213, matching the shape of the first connection protrusion 212. Several insulating partitions 21 are spaced apart along the width of the busbar connector 20. Each pair of adjacent insulating partitions 21 is provided with a second conductive plate 22 on each opposing side. The two second conductive plates 22 are sleeved onto the first connection protrusions 212 of the insulating partitions. The plurality of second conductive plates 22 are arranged into a second conductive plate group 22A. The gaps between adjacent second conductive plates 22 correspond to the thickness of the first conductive plates 113, allowing the first conductive plate 113 to be inserted into the gaps and maintain close contact with the two second conductive plates 22. A metal spring 23 is positioned in the middle of each pair of adjacent second conductive plates 22. This metal spring 23 comprises a connecting portion 231 and an elastic support portion 232. The connecting portion 231 is rectangular and defines a second connecting hole 2311 that matches the shape of the first connecting protrusion 212. The metal spring 23 is sleeved onto the first connecting protrusion 212 of the insulating spacer through its second connecting hole 2311. The elastic support portion 232 includes two arcuate support legs 2321 located outside the connecting portion 231. Both ends of the support legs 2321 extend outward from the connecting portion 231, with their ends bent in opposite directions and extending through the second conductive plates 22 with which they contact. Positioned between the two second conductive plates 22, this metal spring 23 not only maintains close contact with them but also provides strong support for them through its elastic force. At the same time, when the first conductive plate 113 is inserted between the two second conductive plates 22, the elastic deformation of the metal spring 23 makes it easier for the first conductive plate 113 to be inserted between the second conductive plates 22. After the first conductive plate 113 is inserted into the second conductive plate 22, its elastic deformation can make the first conductive plate 113 and the second conductive plate 22 fit more closely, thereby ensuring the reliability of the conductive device.Each bus duct electrical connector 20 is secured to its exterior with a protective housing 24 comprising an upper housing 241 and a lower housing 242. Once the bus duct electrical connector 20 is connected to the bus duct 11, the upper and lower housings 241, 242 can be aligned on the upper and lower sides of the bus duct electrical connector 20 and secured at their edges with screws. As shown in Figures 4A and 4D, the insulating baffles 21, the second conductive plates 22, and the metal springs 23 are connected together via a screw 25 extending through their centers and a nut 26 attached to the ends of the screw.

[0037] As shown in FIG4E , the ends of the first conductive plate group 113A of the two sections of bus duct 11 extending out of the end cover 114 are inserted into the second conductive plate group 22A of the bus duct electrical connector from both ends of the bus duct electrical connector 20, so that the first conductive plates 113 of the first conductive plate group 113A are plugged into the second conductive plates 22 of the second conductive plate group 22A, thereby realizing the electrical connection between the bus duct 11 and the bus duct electrical connector 20.

[0038] To control and distribute the power transmitted through the bus duct, a step-by-step power draw device 30 is plugged into the bus duct 11. As shown in Figures 5A to 5C, the step-by-step power draw device 30 comprises a main body 31, a snap-in mechanism 32, a step-by-step power draw mechanism 33, and a control mechanism 34. The step-by-step power draw device 30 snaps onto the bus duct 11 via the snap-in mechanism 32 and draws power from the bus duct 11 via the step-by-step power draw mechanism 33 located at the bottom of the bus duct. The step-by-step power draw device 30 is electrically connected to the PDU equipment via multiple power outlets 41 or industrial electrical connectors 42 for power output.

[0039] Specifically, as shown in Figure 5B, the main box 31 is located at the lower part of the bus duct 11, and is provided with the step-by-step power supply mechanism 33 and the control mechanism 34. The front panel of the main box 31 is provided with a plurality of concealed power sockets 41 or industrial electrical connectors 42 for connecting to the PDU equipment, which can be plugged into multiple sets of power plugs or connected to multiple electrical devices. In this embodiment, three power sockets 41 are provided on the front panel of the main box 31, and the power sockets 41 are hidden behind the openable and closable outer cover 311. A window 312 is provided on the top of the main box 31 for the upper end of the step-by-step power supply mechanism 33 to extend. A hole is provided on the side of the main box 31 for the operating handle of the step-by-step power supply mechanism 33 to extend.

[0040] As shown in Figures 5D-5F , the latching mechanism 32 of the step-by-step power extraction device includes a latching box 321, a first latching claw 322, a second latching claw 323, a first return spring 324, a first latching claw opening and closing key 325, a second latching claw opening and closing key 326, and a latching claw release button 327. The two latching boxes 321 are symmetrically fixed to the upper ends of the two side surfaces of the main housing 31. Each latching box 321 is provided with a first latching claw slot 3211, a second latching claw slot 3212, and a spring slot 3213. The latching mechanism 32 is disposed on each of the two latching boxes 321. Each latching box 321 is symmetrically provided with a first latching claw 322 and a second latching claw 323 along its width. These first and second latching claws 322 and 323 are movable and retractable along the width of the latching box 321. The first and second clamping jaws 322 and 323 are respectively disposed within the first and second clamping jaw slots 3211 and 3212 within the two clamping boxes 321. The first return spring 324 is disposed within the spring slot 3213. The first and second clamping jaw opening and closing keys 325 and 326 are respectively provided with first and second guide slots 3251 and 3261. The first and second clamping jaws 322 and 323 are inverted L-shaped, with longitudinal projections 3222 and 3232 and transverse projections 3223 and 3233 formed at one end at right angles. The longitudinal projection 3222 of the first clamping jaw is inserted into the first guide slot 3251 of the first clamping jaw opening and closing key, and the longitudinal projection 3232 of the second clamping jaw is inserted into the second guide slot 3261 of the second clamping jaw opening and closing key. The transverse lengths of the first and second guide grooves 3251 and 3261 are greater than the transverse lengths of the longitudinal protrusions 3222 and 3232 of the first and second clamping claws, allowing the longitudinal protrusions 3222 and 3232 to move within the first and second guide grooves 3251 and 3261, thereby pushing the first and second clamping claws 322 and 323 to move, thereby engaging or disengaging from the bus duct 11. The two transverse protrusions 3223 and 3233 of the first and second clamping claws 322 and 323 are located at both ends of the spring groove 3213, and the two ends of the first return spring 324 are connected to the two transverse protrusions 3223 and 3233. The free ends of the first and second clamping claws 322 and 323 extend outside the clamping box 321, and are provided with inwardly bent hooks 3224 and 3234 at their ends for engaging with the ridge 1111 of the bus duct. Block-shaped first limiting protrusions 3221 and 3231 are respectively provided on the claw arms of the first claw 322 and the second claw 323, which cooperate with the second limiting protrusions 3271 and 3272 on the claw release button 327 to limit the first claw 322, the second claw 323 and the claw release button 327.The first and second jaw opening and closing keys 325 and 326 are symmetrically positioned within the notches on either side of the lower portion of the coupling box 321, separated by a partition 3242. A second return spring 328 is housed within a spring hole 3243 in the center of the partition. The ends of the second return spring 328 are connected to the first and second jaw opening and closing keys 325 and 326, respectively, for resetting the two opening and closing keys. A vertically movable jaw release button 327 is provided on either side of the coupling box 321. As shown in FIG5G , the jaw release button 327 is a rectangular block with a smaller top and a larger bottom. Second limiting protrusions 3271 and 3272 are provided on one side of the lower portion, and a vertical spring hole is located in the center of the button. A third return spring 3273 is housed within the spring hole. The two claw release buttons 327 are movably mounted within button holders 3274, which are fixed to the connecting box 321 located on either side of the first claw 322 and the second claw 323. A convex notch is defined in the button holders 3274, and the lower portion of the claw release buttons 327 is movably positioned within the lower notch, allowing for up and down movement within the notch. The claw release buttons 327 are provided with second limiting protrusions 3271 and 3272, which cooperate with the first limiting protrusions 3221 and 3231 on the claw arms to provide a position limit. These second limiting protrusions 3271 and 3272 extend beyond the notch in the button holder 3274. As shown in Figures 5H and 5I, when the first claw 322 and the second claw 323 are in the retracted state, the first limiting protrusion 3221 and the second limiting protrusion 3231 on their claw arms are located above the second limiting protrusions 3271 and 3272 on the claw release button 327. At this time, the claw release button 327 cannot move up and down. When the step-by-step power extraction device 30 is to be connected to the bus duct 11, the first claw opening and closing key 324 and the second claw opening and closing key 325 can be pushed inward, which pushes the first claw 322 and the second claw 323 to open outward through the longitudinal protrusions 3222 and 3232 of the first claw 322 and the second claw 323. At this time, the first limiting protrusion 3221 and the second limiting protrusion 3231 on the first claw 322 and the second claw 323 move to the outside of the second limiting protrusion 3271 and 3272 on the claw release button 327, and the claw release button 327 is disengaged from the limit and bounces upward. When the claw release button 327 is pressed and the first claw opening and closing key 324 and the second claw opening and closing key 325 are released, the first claw 322 and the second claw 323 move to opposite sides, and their hooks 3224 and 3234 are locked on the convex edge 1111 of the bus duct, and the step-by-step power extraction device 30 is connected to the bus duct 11, thereby completing the first step of step-by-step power extraction.

[0041] As shown in Figures 5J to 5L , the step-by-step power extraction mechanism 33 of the step-by-step power extraction device 30 is located on one upper side of the main housing 31. It includes a power extraction unit 331 for connecting to the busbar and an operating unit 332 for performing power extraction operations. The power extraction unit 331 includes several electrical connection plates 3311, several insulating plates 3312, and a fixing seat 3313. The electrical connection plates 3311 are strip-shaped conductive copper plates, the upper ends of which are composed of an outward-bending inclined surface, a vertical plane formed by the inclined surface, and an arcuate surface formed by the vertical plane. The turning surface is used to increase the elasticity of the electrical connection plate and the reliability of the electrical connection. Several slits 33111 are spaced apart along the width of the upper middle portion of the electrical connection plate 3311, and the lower end is L-shaped. The L-shaped connection ends of each electrical connection plate 3311 are fixed to the fixing seat 3313 with screws, and the fixing seat is fixed to the bracket 3315. A front baffle 3314 is screwed to the front side of the fixing base 3313. The upper end of each electrical connection plate 3311 abuts against a resilient conductive copper plate 3316 on one side of the insulating plate 3312. This resilient conductive copper plate 3316 is a curved plate formed by multiple transition surfaces. Its upper end is provided with a U-shaped arc surface, which abuts against the insulating plate 3312. The curved shape of the resilient conductive copper plate 3316 helps increase the elastic deformation of the electrical connection plate 3311 when plugged into the first conductive plate 113, and ensures close contact after plugging. Several electrical connection plates 3311 of the power extraction unit 331 are arranged along the width of the main housing 31, corresponding to the first conductive plate group 113A in the bus duct, to form an electrical connection plate group 331A. The upper end of the electrical connection plate group 331A extends outside the main housing 31 and is inserted from the bottom of the bus duct into the first conductive plate group 113A, connecting the electrical connection plate group 331A and the first conductive plate group 113A to each other, allowing power to be extracted. This completes the second step of the step-by-step power extraction system.

[0042] As shown in Figures 5M and 5N, the operating part 332 includes a connecting rod mechanism 3321, a connecting seat 3322, an operating handle 3323, a lifting rod 3324 and a guide column 3325. The operating part 332 is connected to the lower side of the power taking part 331 and is provided with a connecting rod mechanism 3321 that drives the power taking part to move up and down. The connecting rod mechanism 3321 includes an active connecting rod 33211 and two pairs of driven connecting rods 33212 and 33213. Among them, the active connecting rod 33211 is a multi-arm connecting rod with three arms, the first arm 33211A of which is fixedly connected to the operating handle 3323 and rotates around a first pin 33214 fixed to the side wall of the connecting seat 3322. The second arm 33211B is placed in the limiting groove 33221 at the top of the connecting seat to limit the left and right movement of the active connecting rod 33211. The end of the third arm 33211C is hinged to two pairs of driven links 33212 and 33213 via a second pin 33215. Each pair of driven links 33212 and 33213 is composed of two symmetrical links in front and back. The other end of the driven link 33212 is hinged to the third pin 33216. The other end of the driven link 33213 is hinged to the lifting rod 3324 of the operating part. The connecting rod mechanism 3321 is connected to the connecting seat 3322 fixed to the side wall of the main box body. The input end of the connecting rod mechanism 3321 is connected to the operating handle 3323, the main body of the operating handle 3323 extends to the outside of the main box body 31. The output end of the connecting rod mechanism 3321 is connected to the vertical lifting rod 3324, the upper end of which is fixed to the bracket 3315. Two guide posts 3325 are fixed to the bracket 3315 of the power supply unit. The lower ends of the two guide posts 3325 are fixed to a support plate 3326 connected to the side wall of the main box 31. The two guide posts 3325 extend upward into the bracket 3315. Under the action of the lifting rod 3324, the bracket 3315 can move up and down along the two guide posts 3325, thereby connecting or disconnecting the electrical connection plate group 331A with the first conductive plate group 113A in the bus duct to draw power. When the operating handle 3323 is pressed or lifted, the linkage mechanism 3321 pushes the lifting rod 3324 up and down, connecting or disconnecting the electrical connection plate group 331A of the power supply unit with the first conductive plate group 113A in the bus duct to draw power.

[0043] When taking power in steps, first, the step-by-step power taking device 30 is clamped to the bottom of the bus duct 11 through the clamping mechanism 32. After the clamping is completed, the electrical connection plate group 331A of the step-by-step power taking device is located below the first conductive plate group 113A of the bus duct. When the operating handle 3323 of the step-by-step power taking device is pressed, the electrical connection plate group 331A moves upward under the drive of the connecting rod mechanism 3321 and is inserted into the first conductive plate group 113A of the bus duct, so that each electrical connection plate 3311 of the electrical connection plate group 331A is in close contact with each first conductive plate 113 of the first conductive plate group 113A and is conductive, thereby completing the step-by-step power taking of the step-by-step power taking device 30 from the bus duct. If you want to disconnect, just lift the operating handle 3323.

[0044] As shown in Figure 5O , the control mechanism 34 of the step-by-step power extraction device includes a control unit 341, a power extraction unit 342, an output unit 343, and a monitoring module 344. The monitoring module 344 integrates a switching power supply 3441, a current acquisition unit 3442, a voltage acquisition unit 3443, a monitoring unit 3444, a communication interface unit 3445, and a display screen 3446. The control unit 341 is a circuit breaker that distributes power to the busbar and connects and disconnects power-consuming devices to the busbar circuit, protecting the power distribution system. When a line is severely overloaded or a fault occurs, it automatically disconnects the circuit, ensuring the safe use of the busbar and the step-by-step power extraction device. The control unit 341 is electrically connected to the power extraction unit 342 and the output unit 343, respectively. The power extraction unit 342 is electrically connected to the first conductive plate assembly 113A of the power extraction unit 331. The output unit 343 is electrically connected to the power socket 41 or industrial electrical connector 42. A switching power supply 3441 is connected between the power extraction unit 342 and the control unit 341. A current acquisition unit 3442 and a voltage acquisition unit 3443 are connected between the control unit 341 and the output unit 343. These current acquisition unit 3442 and voltage acquisition unit 3443 are current and voltage sensors, respectively, electrically connected to the power extraction portion 331 of the step-by-step power extraction mechanism and used to collect real-time data on the current and voltage of the power extraction unit 342. These current acquisition unit 3442 and voltage acquisition unit 3443 are also connected to a monitoring unit 3444, a single-chip microcomputer, which is connected to the switching power supply 3441, the communication interface unit 3445, and the display screen 3446. The monitoring unit 3444 analyzes and processes the monitored current and voltage data, converting them into data such as power, energy, and temperature, and sends signals to the switching power supply 3441 and the communication interface unit 3445 for display on the display screen 3446.

[0045] Thus, the present invention connects multiple sections of bus duct into one through multiple bus duct electrical connectors, forming a length that can be adjusted as needed. The connection between the bus duct and the bus duct electrical connector is convenient and fast, easy to assemble and use, and uses a safe and reliable high-power power transmission line. Equally important, the present invention provides a step-by-step power supply device that can draw power in steps. It can be quickly connected to the bus duct through a snap-on mechanism, and the step-by-step power supply mechanism can be operated to draw power from the bus duct and safely distribute the obtained electrical energy to electrical equipment. It can also effectively and safely control the power supply and output process, thereby providing a safe and efficient power distribution system for equipment such as PDUs.

[0046] Although the present invention is disclosed through the above embodiments, the protection scope of the present invention is not limited thereto. Without departing from the concept of the present invention, any deformation or replacement of the above components shall fall within the scope of the claims of the present invention.

Claims

1. A detachable integrated power distribution system, characterized in that: The system includes: A segmented bus duct (10), comprising a plurality of segmented bus ducts (11), wherein the segmented bus duct (10) is electrically connected to a bus duct electrical connector (20), a step-by-step power extraction device (30) and a power distribution device respectively; A plurality of bus duct electrical connectors (20) which connect a plurality of sections of bus duct (11) into one; The step-by-step power taking device (30) is plugged into a bus duct (11). The step-by-step power taking device (30) is provided with a main box (31), a clamping mechanism (32), a step-by-step power taking mechanism (33) and a control mechanism (34). The step-by-step power taking device (30) is clamped with the bus duct (11) through the clamping mechanism (32), and is connected to the bus duct (11) through the step-by-step power taking mechanism (33) to take power. The step-by-step power taking device (30) is electrically connected to a PDU device through a plurality of power sockets (41) or industrial electrical connectors (42) for power output, and The system connects multiple sections of bus duct (11) into one body in a detachable manner and conducts the connections, and a step-by-step power taking device (30) for step-by-step power taking and safety control is integrated on the bus duct (11).

2. The detachable integrated power distribution system according to claim 1, characterized in that: Each section of the bus duct (11) in the segmented bus duct (10) is provided with a trough body (111) with two ends and an open bottom, a convex edge (1111) for connecting the clamping mechanism (32) is provided on the outer side of the trough body (111) along the length direction, a plurality of insulating sheaths (112) are arranged at intervals in the width direction in the trough body (111), a first conductive plate (113) is provided in each insulating sheath (112), a plurality of first conductive plates (113) are arranged to form a first conductive plate group (113A), two ends of each first conductive plate (113) extend from two ends of the insulating sheath (112), and an end cover (114) connected to a bus duct electrical connector (20) is provided at the end of each section of the bus duct (11).

3. The detachable integrated power distribution system according to claim 2, characterized in that: The trough body (111) is made of an aluminum alloy material, the insulating sheath (112) is made of a fire-resistant and flame-retardant insulating material, and the first conductive plate (113) is a strip-shaped copper plate.

4. The detachable integrated power distribution system according to claim 2, characterized in that: The bus duct electrical connector (20) is provided with a plurality of insulating partitions (21), which are arranged at intervals along the width direction of the bus duct electrical connector (20), and a second conductive plate (22) is provided on the opposite sides of each pair of adjacent insulating partitions (21), and a plurality of second conductive plates (22) are arranged into a second conductive plate group (22A), and the gap between adjacent second conductive plates (22) corresponds to the thickness of the first conductive plate (113), and a metal spring (23) is provided in the middle of each pair of adjacent second conductive plates (22), and the metal spring (23) is respectively connected to the second conductive plates (22) located on both sides thereof, and the outer part of each bus duct electrical connector (20) is clamped with a protective shell (24) that matches with each other up and down, and the plurality of insulating partitions (21), the plurality of second conductive plates (22), and the plurality of metal springs (23) are connected as a whole through a screw (25) passing through the center thereof and a nut (26) connected to the end of the screw.

5. The detachable integrated power distribution system according to claim 4, characterized in that: The protective shell (24) comprises an upper shell (241) and a lower shell (242), and the upper shell (241) and the lower shell (242) are fixed at both side edges by screws.

6. The detachable integrated power distribution system according to claim 4, characterized in that: The insulating partition (21) is made of a heat-resistant, corrosion-resistant and anti-aging insulating material. Among the several insulating partitions (21) of the bus duct electrical connector, the insulating partitions (21) located at the two end portions are flat plates with a screw hole (214) opened in the center. Rectangular recesses (211) for accommodating the second conductive plate (22) are respectively provided on both sides of each insulating partition (21) located between the insulating partitions at the two end portions, wherein a first connecting protrusion (212) with a connecting hole is provided in the center of the rectangular recess on one side, and a second connecting protrusion (213) with a hole for accommodating the first connecting protrusion (212) on the opposite side is provided in the center of the rectangular recess on the other side.

7. The detachable integrated power distribution system according to claim 4, characterized in that: The metal spring (23) comprises a connecting portion (231) and an elastic support portion (232), wherein the connecting portion (231) is rectangular and is provided with a connecting hole (2311) matching the shape of the first connecting protrusion (212), and the elastic support portion (232) comprises two arc-shaped supporting feet (2321) located outside the connecting portion (231), and both ends of the two supporting feet (2321) extend outwardly beyond the connecting portion (231), and the ends thereof are reversely bent and pass through the second conductive plate (22) in contact with the connecting portion (231).

8. The detachable integrated power distribution system according to any one of claims 4 or 6, characterized in that: Two second conductive plates (22) and a metal spring sheet (23) located between adjacent insulating partitions (21) are sleeved on a first connecting protrusion (212) on one side of the insulating partition (21), and the first connecting protrusion (212) is inserted into the inner hole of the second connecting protrusion (213) of the insulating partition on the opposite side, so that a plurality of insulating partitions (21), a plurality of second conductive plates (22), and a plurality of metal spring sheets (23) are connected in sequence.

9. The detachable integrated power distribution system according to claim 1, characterized in that: The main box (31) of the step-by-step power supply device (30) is provided with the step-by-step power supply mechanism (33) and the control mechanism (34), and the front panel of the main box (31) is provided with a concealed power socket (41) connected to the PDU device, which is hidden behind an openable and closable outer cover (311). The top of the main box (31) is provided with a window (312) for the upper end of the step-by-step power supply mechanism (33) to extend out, and the side of the main box (31) is provided with a hole for the operating handle of the step-by-step power supply mechanism (33) to extend out.

10. The detachable integrated power distribution system according to claim 1, characterized in that: The clamping mechanism (32) of the step-by-step power extraction device is provided with two clamping boxes (321), which are symmetrically fixed to the upper ends of both sides of the main box body (31), and the clamping boxes (321) are provided with a first clamping claw groove (3211), a second clamping claw groove (3212) and a spring groove (3213), and each clamping box (321) is symmetrically provided with a retractable first clamping claw (322) and a second clamping claw (323) on both sides along the width direction, and the first clamping claw (322) and the second clamping claw (323) are respectively connected to the first reset spring (324), and the first clamping claw (322) and the second clamping claw (323) are respectively connected to the first reset spring (324). A first limiting protrusion (3221, 3231) is respectively provided, and a first clamping claw opening and closing key (325) and a second clamping claw opening and closing key (326) which can be moved laterally are symmetrically provided at the lower part of the clamping box (321), and a first guide groove (3251) and a second guide groove (3261) are respectively provided on the first clamping claw opening and closing key and the second clamping claw opening and closing key, and a vertically movable clamping claw release button (327) is provided on both sides of the clamping box (321), and a second limiting protrusion (3271, 3272) is provided on the clamping claw release button (327) for cooperating with the first limiting protrusion (3221, 3231) on the clamping claw arm for limiting.

11. The detachable integrated power distribution system according to claim 10, characterized in that: The first clamping claw (322) and the second clamping claw (323) are respectively arranged in the first clamping claw groove (3211) and the second clamping claw groove (3212) in the two clamping boxes (321); the first reset spring (324) is arranged in the spring groove (3213); the first clamping claw (322) and the second clamping claw (323) are in an inverted L shape, and one end of each of the first clamping claw (3222, 3232) and the first transverse protrusion (3223, 3233) are formed with a right-angled longitudinal protrusion (3222, 3232); the longitudinal protrusion (3222, 3232) are respectively inserted into the first guide groove (3251) and the second guide groove (3261) on the first clamping claw opening and closing key and the second clamping claw opening and closing key; the length of the first guide groove (3251) and the second guide groove (3261) is greater than the first The lengths of the longitudinal protrusions (3222, 3232) of the clamping claw and the second clamping claw enable the longitudinal protrusions (3222, 3232) to move in the first guide groove (3251) and the second guide groove (3261) to push the first clamping claw (322) and the second clamping claw (323) to move. The two transverse protrusions (3223, 3233) are located at both ends of the spring groove (3213). The two ends of the first return spring (324) are connected to the two transverse protrusions (3223, 3233). The free ends of the first clamping claw (322) and the second clamping claw (323) extend out of the clamping box (321). The ends of the free ends of the first clamping claw (322) and the second clamping claw (323) are provided with hooks (3224, 3234) that turn inward. The first limiting protrusions (3221, 3231) are arranged on the clamping claw arms.

12. The detachable integrated power distribution system according to claim 11, characterized in that: The first clamping claw opening and closing key (325) and the second clamping claw opening and closing key (326) are symmetrically arranged in the notches on both sides of the lower part of the clamping box (321), and are separated by a partition (3242) in the middle. A second return spring (328) is installed in the spring hole (3243) on the partition. The two ends of the second return spring (328) are respectively connected to the first clamping claw opening and closing key (325) and the second clamping claw opening and closing key (326). When the first clamping claw opening and closing key (325) and the second clamping claw opening and closing key (326) are pushed inward, the second return spring (328) is pressed inward. When a claw opening and closing key (325) and a second claw opening and closing key (326) are opened, the first claw (322) and the second claw (323) are opened outward, the first claw (322) and the second claw (323) are placed on the convex edge (1111) of the busbar duct, and the first claw opening and closing key (325) and the second claw opening and closing key (326) are released, so that the hooks (3224, 3234) can be locked on the convex edge (1111).

13. The detachable integrated power distribution system according to claim 2, characterized in that: The step-by-step power taking mechanism (33) of the step-by-step power taking device is arranged at an upper portion of one side inside the main box (31), and comprises a power taking part (331) for connecting to a bus duct and an operating part (332) for performing power taking operations.

14. The detachable integrated power distribution system according to claim 13, characterized in that: The power taking part (331) is provided with an electrical connection plate group (331A) corresponding to the first conductive plate group (113A) in the bus duct, and each electrical connection plate (3311) of the electrical connection plate group (331A) is connected to a plurality of insulators (3312), and the upper ends thereof extend out of the main box body (31); the electrical connection plate group (331A) and the plurality of insulators (3312) are provided on a fixing seat (3313), and the fixing seat is fixed on a bracket (3315) connected to the main box body.

15. The detachable integrated power distribution system according to claim 13, characterized in that: The operating part (332) is connected to the lower side of the power taking part (331), and is provided with a connecting rod mechanism (3321) for driving the power taking part to move up and down. The connecting rod mechanism (3321) is connected to a connecting seat (3322) fixed to the side wall of the main box body. The input end of the connecting rod mechanism (3321) is connected to an operating handle (3323). The main body of the operating handle (3323) extends to the outside of the main box body (31). The output end of the connecting rod mechanism (3321) is connected to a vertical lifting rod (3323). 324), the upper end of the lifting rod (3324) is fixed to the bracket (3315), and two guide columns (3325) are fixed to the bracket (3315), and the two guide columns (3325) enter the bracket (3315) upward. Under the action of the lifting rod (3324), the bracket (3315) can move up and down along the two guide columns (3325) to connect or disconnect the electrical connection plate group (331A) and the first conductive plate group (113A) in the bus duct.

16. The detachable integrated power distribution system according to claim 14, characterized in that: The connecting rod mechanism (3321) comprises an active connecting rod (33211) and two pairs of driven connecting rods (33212, 33213), wherein the active connecting rod (33211) has three arms, the first arm (33211A) is hinged to the operating handle (3323) and rotates around a first pin (33214) fixed on the side wall of the connecting seat (3322), the second arm (33211B) is placed in a limiting groove (33221) on the top of the connecting seat, the end of the third arm (33211C) is hinged to the two pairs of driven connecting rods (33212, 33213) through a second pin (33215), and one end of the driven connecting rod (33212) is hinged to the third pin (33216). The other end of the driven connecting rod (33213) is hinged to the lifting rod (3324) of the operating part. When the operating handle (3323) is pressed down or lifted up, the connecting rod mechanism (3321) pushes the lifting rod (3324) to move up and down, so that the electrical connection plate group (331A) of the power-taking mechanism is connected to or disconnected from the first conductive plate group (113A) in the bus duct to take power.

17. The detachable integrated power distribution system according to claim 13, characterized in that: The control mechanism (34) of the step-by-step power extraction device comprises a control unit (341), a power extraction unit (342), an output unit (343) and a monitoring module (344), wherein the monitoring module (344) integrates a switching power supply (3441), a current acquisition unit (3442), a voltage acquisition unit (3443), a monitoring unit (3444), a communication interface unit (3445) and a display screen (3446); the control unit (341) is a circuit breaker, to which the power extraction unit (342) and the output unit (343) are connected; the power extraction unit (342) is electrically connected to the power extraction part (331) of the step-by-step power extraction mechanism; the output unit (343) is electrically connected to the power socket (41) or an industrial electrical connector. The device (42) is electrically connected, a switching power supply (3441) is connected between the power taking unit (342) and the control unit (341), a current collection unit (3442) and a voltage collection unit (3443) are connected between the control unit (341) and the output unit (343), the current collection unit (3442) and the voltage collection unit (3443) are respectively electrically connected to the power taking part (331) of the step-by-step power taking mechanism, the current collection unit (3442) and the voltage collection unit (3443) are also respectively connected to the monitoring unit (3444), the monitoring unit (3444) is a single chip microcomputer, which is respectively connected to the switching power supply (3441), the communication interface unit (3445) and the display screen (3446).

Images