KR20230170422A - Apparatus for testing electric seat in automotive seat assembly line - Google Patents

Abstract

The present invention relates to an electric seat inspection device that inspects the operation of motors for multiple functions installed on an electric seat during the automobile seat assembly process, with multiple inspection channels (CH1) corresponding to each of the motors for multiple functions installed on one automobile electric seat. An inspection panel (2) for an electric seat inspection machine, including an integrated unit box (6) per electric seat equipped with a relay module having ~CH4) and a test controller (4) for controlling the motor function test for each channel of multiple relay modules. Construct; The integrated unit box (6) per electric seat is a multi-layer circuit board ( It is configured to be formed on 10, and the relays 24, 26 for each channel and the current sensor 28 are located on the upper and lower cases 12 and 14 of the integrated unit box 6 per electric sheet. 18), and each inspection channel CH1 to CH4 of the multilayer circuit board 10 is connected in parallel to each of the multilayers (L1 to L4) of the multilayer circuit board 10 so that the high current of the motor power is distributed. It is configured to form a distribution strip line 40.

Description

Electric seat tester device in automobile seat assembly line {APPARATUS FOR TESTING ELECTRIC SEAT IN AUTOMOTIVE SEAT ASSEMBLY LINE}

The present invention relates to an automobile seat assembly line, and in particular, an electric seat inspection device that facilitates field installation of an electric seat inspection machine that inspects the operation of an electric seat assembled on an automobile seat assembly line and reduces the inspection machine manufacturing period and cost. It is about the improvement of .

Generally, an automobile factory consists of a press shop, body shop, paint shop, assembly shop, and engine shop. The assembly process also includes assembling car seats.

Looking at the automobile assembly process in detail, interior and exterior design components such as interior, instrument panel, and seats are installed on the painted car body, and units such as the engine and transmission are assembled to complete vehicle assembly through electrical components, wiring, and piping work. In this process, a large number of parts, up to 3,000 types, are installed and assembled, so logistics management to ensure that parts are supplied to the right place at the right time and inspection of assembled products are essential.

The assembly process is labor-intensive and requires few dedicated facilities. Even if the car model changes, there is no major equipment change, and compared to other processes, the automation rate is the lowest at around 10%. Therefore, in this process, it is most important to reduce manual errors as much as possible and to assemble the supplied parts properly according to the assembly parts list, as this is directly related to the quality of the finished product.

In the case of car seats, they are assembled at the end of the assembly process and are the most expensive single automotive parts after the engine and transmission. Luxury cars may be equipped with seats that are more expensive than the engine. Therefore, if defects that differ from the parts specifications or inspection defects occur during the car seat assembly process, the loss is very large.

Most car seats these days are composed of electric seats, and convenience functions such as back and forth sliding function, height adjustment function, backrest angle adjustment function, heating function and seating detection function, and leg support function are added to the electric car seat. At the assembly and inspection line, defects are inspected for each additional function, and only products that pass the inspection are installed in vehicles.

The automobile seat assembly line system includes convenience functions for each electric seat, such as forward and backward sliding function (slide), height adjustment function (hight), backrest angle adjustment function (tilt), and leg support function (extension). ) is equipped with an electric seat tester used to drive and inspect the performance of motors for each function, such as ).

Since the electric seat tester must perform multiple tests related to the motor drive for each function of the electric seat, numerous relays or inspection circuit parts must be used to implement the electric seat tester, so wiring connections between multiple relays and input/output connectors or wiring connections between relays are required. Since wiring work must be performed one by one to connect circuit components, it takes several weeks (approximately one month) to manufacture an inspection machine for inspecting electric seats on an automobile seat assembly line. In addition, the existing electric seat inspection machine requires the use of many inspection panels (enclosures) for mounting circuit components, and requires a large inspection panel space such that the front area of each inspection panel is as large as 950*800 mm, for example.

Due to the characteristics of the automobile seat assembly and inspection line, the smaller the space occupied by the inspection panel (box) of the electric seat inspection machine, the better, but the automobile seat is equipped with a large number of motors for each function, and the number of inspection panels must be large to inspect the motors for each function. The space occupied by the inspection unit also increases.

As a result, the size of the test panel of the electric seat tester increases, causing difficulties in field installation, and the need to connect wires one by one causes the tester to take a long time and cost a lot.

Registered Patent Publication No. 10-1793645 “Automobile power seat inspection device”

Therefore, the purpose of the present invention is to provide an electric seat inspection device that facilitates field installation of an electric seat inspection device that inspects the operation of motors for each function installed in the electric seat during assembly and fixation of the automobile seat and reduces the inspection machine manufacturing period and cost. .

Another object of the present invention is to provide forward and backward sliding function (slide), height adjustment function (hight), backrest angle adjustment function (tilt), and leg support function (extension) employed in automobile electric seats in the automobile seat assembly line system. The aim is to provide an electric seat inspection device optimized for driving and inspecting the performance of motors for each function such as.

The present invention for the above purpose is an electric seat inspection device that inspects the operation of a motor for each function of a plurality of functions installed on an electric seat during the automobile seat assembly process. An inspection panel for an electric seat inspection machine is composed of an integrated unit box per electric seat equipped with a relay module with multiple inspection channels corresponding to each motor, and an inspection controller to control motor function inspection for each channel of multiple relay modules. and;

Each of the multiple inspection channels of the relay module of the integrated unit box per electric seat is formed on an integrated multilayer circuit board, and polarity relays for each channel are used to select the (+) (-) polarity of the motor power for each function. And, link relays for each channel to select on/off of the motor power applied to the motor for each function, current sensors for each channel to monitor the output current of the motor power applied to the motor for each function, and the voltage of the motor for each function. It is modularized and consists of voltage check units for each channel to check whether it is normal.

The current of the motor power is between the motor power input connector and the polarity relay on the inspection channel of the multilayer circuit board, between the polarity relay and the link relay on the inspection channel, and between the link relay on the inspection channel and the motor power output connector of the multilayer circuit board. It is characterized in that distribution strip lines connected in parallel for distribution are formed on each layer of the multilayer circuit board.

In addition, in the electric seat inspection device in the automobile seat assembly process of the present invention, link relays for each channel and current sensors for each channel mounted on a multilayer circuit board are installed in close proximity to each other, and the current sensors are provided so that they are shielded from the magnetic fields of the link relays. It is characterized by being spatially separated by a magnetic barrier for shielding.

In addition, in the electric seat inspection device in the automobile seat assembly process of the present invention, the multilayer circuit board includes a relay control connector through which a relay control signal from the inspection controller is input, a channel-specific current monitoring connector connected to channel-specific current sensors, and It is characterized by further comprising a voltage check output connector connected to the voltage check units for each channel.

In addition, as another aspect of the present invention, in the electric seat inspection device for inspecting the operation of a plurality of motors for each function installed on the electric seat during the car seat assembly process, a plurality of motors corresponding to each of the plurality of motors for each function installed on one electric car seat are provided. An inspection panel for an electric seat inspection machine is configured to include an integrated unit box per electric seat equipped with a relay module having an inspection channel and an inspection controller for controlling motor function inspection for each channel of multiple relay modules;

The integrated unit box per electric seat consists of a relay module in which channel-specific relays for motor function inspection, current sensors, and voltage confirmation units are centrally arranged, formed on a multi-layer circuit board, and the channel-specific relays and current sensors are The integrated unit box per electric seat is spatially separated by shielding magnetic partitions within the upper and lower cases, and distribution strip lines are connected in parallel to each layer of the multilayer circuit board to distribute the high current of the motor power to each inspection channel of the multilayer circuit board. It is characterized by being formed.

The present invention has the advantage of facilitating field installation of an electric seat inspection machine that inspects the operation of motors for each function installed on the electric seat during the automobile seat assembly process and reducing the inspection machine manufacturing period and cost. In particular, motors for each function, such as forward and backward sliding function (slide), height adjustment function (hight), backrest angle adjustment function (tilt), and leg support function (extension), are used in automobile electric seats in the automobile seat assembly line system. There is also the advantage of being optimized through modularization in driving and inspecting performance.

1 is a schematic front configuration diagram of an inspection panel for an electric seat inspection machine on an automobile seat assembly line according to an embodiment of the present invention;
Figure 2 is an external configuration diagram of the integrated unit box for each electric seat mounted on the inspection panel for the electric seat inspection machine of Figure 1;
Figure 3 is an exploded perspective view of the multilayer circuit board built into the integrated unit box for each electric seat of Figure 2;
Figure 4 is a longitudinal cross-sectional view of the integrated unit box for each electric seat of the present invention;
Figure 5 is a plan view of a multi-layer circuit board with a relay module mounted on the integrated unit box for each electric seat of the present invention;
Figure 6 is a conceptual configuration diagram of a distribution strip line in which a circuit pattern is printed on a multilayer circuit board on which the relay module of the present invention is mounted;
Figure 7 is a circuit block diagram for each channel of the multilayer circuit board on which the relay module of the present invention is mounted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. In the specification of the present invention, the multiple inspection channels (CH1) to (CH4) are described as four channels, but it should be understood that this is a preferred example.

Figure 1 is a schematic front configuration diagram of an inspection panel 2 for an electric seat inspection machine on an automobile seat assembly line according to an embodiment of the present invention.

As shown in FIG. 1, the inspection panel 2 for an electric seat inspection machine according to the present invention is equipped with a motor for each function (e.g., forward and backward sliding function (slide), height adjustment function (hight)) mounted on the electric seat on the automobile seat assembly line. ), backrest angle adjustment function (tilt), leg support function (extension, etc.), etc.] as a device for testing the operation of the enclosure 1, where the left and right widths (x) and top and bottom widths (y) of the front area are miniaturized to 870*500mm. Just configure it as it is.

The inspection panel (2) for the electric seat inspection machine is equipped with an inspection controller (4), a minicomputer for control, and multiple integrated unit boxes (6) per electric seat that modularize the inspection functions of motors for each function of each car seat are installed in each slot. am.

Among the components of the inspection panel (2) for electric seat inspection, the inspection controller (4) is connected with a cable to a plurality of integrated unit boxes (6) per electric seat installed in the inspection panel (2), and the integrated unit per electric seat In addition to applying the inspection control signal to the box (6), each result data output from the integrated unit box (6) for each electric seat is collected and analyzed, and the performance of the motors for each function provided in the electric seat of the car is judged pass/fail. Make decisions and monitor the results.

Among the components of the inspection panel for electric seat inspection (2), the integrated unit box (6) per electric seat is miniaturized to the size of one to two adult palms (horizontal and vertical sizes), and is divided into motor functions for motor polarity inspection and motor drive inspection. Not only does it contribute to the ease of installation at the assembly site by modularizing all test circuit components for the test relay function, motor current value inspection function, and motor voltage abnormality inspection function, but also requires existing workers to manually connect wiring between test circuit components. It was implemented to minimize the period.

FIG. 2 is an external configuration diagram of the integrated unit box 6 for each electric seat mounted on the inspection panel 2 for the electric seat inspection machine of FIG. 1, and FIG. 3 is a diagram showing the external configuration of the integrated unit box 6 for each electric seat shown in FIG. 2. It is an exploded perspective view of the multilayer circuit board 10, and Figure 4 is a longitudinal cross-sectional view of the integrated unit box 6 for each electric sheet of the present invention. And, Figure 5 is a plan view of the multi-layer circuit board 10 on which the relay module is mounted in the integrated unit box 6 for each electric seat of the present invention.

Figure 6 is a conceptual configuration diagram of a distribution strip line 40 formed in a printed pattern on a multilayer circuit board 10 on which the relay module of the present invention is mounted, and Figure 7 is a multilayer circuit board 10 on which the relay module of the present invention is mounted. ) This is a circuit block diagram for each channel.

The integrated unit box 6 for each electric seat of the present invention implements a relay module having a plurality of inspection channels (CH1) to (CH4) corresponding to each of the motors for each function mounted on one electric seat. Rather than adopting a wiring connection method, the circuit components of the relay module for motor function inspection are centrally arranged and electrically connected on the circuit board.

However, since the integrated unit box 6 for each electric seat has the size of an adult's palm for ease of installation in the field, the size of the circuit board built into the integrated unit box 6 for each electric seat must be reduced accordingly.

In the present invention, in order to reduce the size of the circuit board built into the integrated unit box 6 for each electric seat, the circuit board is implemented as a multilayer circuit board 10 with multiple layers (4 layers in the example of the present invention). The size of the multilayer circuit board 10 of the present invention is miniaturized to a size slightly smaller than the palm of an adult's palm.

Nevertheless, the multilayer circuit board 10 of the present invention is a motor power supplied to the motors for each function of the electric seat, and must be designed to ensure that there is no problem with heat generation or burnout even when a high current such as DC 15V/30A is applied. In addition, it must be implemented so that there are no problems with circuit operation even though inspection circuit components such as modular motor relays are concentrated. In addition, it must have an input/output connector configuration to facilitate cable connection with the inspection controller (4), a minicomputer for inspection control.

Referring to Figures 2 and 3, a multi-layer circuit board 10 miniaturized to the size of a palm is built into the upper and lower cases 12 and 14, and the relay module modularized in the integrated unit box 6 for each electric seat is configured. In order to be connected with a cable to the test controller (4 in Figure 1) for controlling the motor function test for each channel, the multilayer circuit board 10 is equipped with a plurality of input and output connectors (20a) (20b) (20c) (20d) (22a) ) (22b) (22c) are provided.

In the present invention, as shown in FIG. 7, a plurality of motors for each function (e.g., forward and backward sliding function (slide), height adjustment function (hight), backrest angle adjustment) are installed on one electric seat of a car on an integrated multilayer circuit board (10). function (tilt), leg support function (extension, etc.)] A plurality of inspection channels (CH1) to (CH4) corresponding to each are formed, and electrical connections are made for each channel on the multilayer circuit board (10).

In other words, one inspection channel is equipped with circuit parts for inspection of one function-specific motor among the multiple function-specific motors mounted on one electric seat and is electrically connected. As in the example of the present invention, the multilayer circuit board 10 is provided with four inspection channels (CH1) to (CH4), and four motors for each function mounted on one electric seat (forward and backward sliding function (slide)) , height adjustment function (hight), backrest angle adjustment function (tilt), and leg support function (extension)]. It has a modular configuration so that circuit components for each channel are centrally arranged for inspection.

For test connection according to the present invention, the multilayer circuit board 10 is provided with a plurality of input/output connectors 20a, 20b, 20c, 20d, 22a, 22b, and 22c.

That is, the input and output connectors formed on the multilayer circuit board 10 according to the present invention include motor power input and output connectors 20a and 22a related to motor power, and relay control signals (PR1 to PR1) from the inspection controller 4. 4) Relay control connectors (20b) (20c) where (LR1 to 4) are input, fan driving power connector (20d), and current monitor output connector (22b) for each channel connected to the output of the current sensors (28) for each channel. and a voltage confirmation output connector 22c connected to the output of the voltage confirmation units 30 for each channel. In addition, the multilayer circuit board 10 is also provided with a fan connector 36 for connecting the output of the fan driving unit 34 to the cooling fan 18 installed above the relays 24 and 26 with a cable.

The modularized circuit components mounted on the integrated multilayer circuit board 10 according to the present invention include polarity relays 24 for each channel, link relays 26 for each channel, and current sensors 28 for each channel. and voltage checking units 30 for each channel are provided, and the relay 24 (24) in the integrated unit box 6 per electric seat is provided to prevent overheating due to the operation of the relays 24 and 26 distributed intensively through modularization. 26) A fan driving unit 34 is also provided to drive the cooling fan 18 installed above.

The polarity relay 24 for each channel is a relay for selecting the (+) (-) polarity of the motor power for each function. The polarity is transmitted by wire from the inspection controller (4 in FIG. 1) and applied through the relay control connector 20b. Select the (+) (-) polarity of the motor power according to the selection control signal (PR1~4).

The link relay 26 for each channel is a relay for selecting the motor power on/off applied to the motor for each function. The motor power on/off signal is transmitted by wire from the inspection controller (4 in FIG. 1) and applied through the relay control connector 20c. Select the switch-on or switch-off state of the motor power according to the control signals (LR1~4).

The current sensor 28 for each channel is a means for monitoring the output current of the motor power applied to the motor for each function and includes a Hall sensor and an amplifier, and measures the current values (S1 to S4) sensed for each channel. It is output through the current monitor output connector (22b) and transmitted to the inspection controller (4). The sensing current value (S1~S4) is in the range of 0~25A (0~10V).

The voltage check unit 30 for each channel is a means to check whether the voltage of the motor for each function is normal. If the voltage of the motor for each function is higher than the preset reference voltage (12.3 V), it uses binary logic as voltage check signals (TF1 to 4). A “high” state is output, and if it is less than the reference voltage (12.3V), a binary logic “low” state is output as a voltage confirmation signal (TF1 to 4). The voltage confirmation signals (TF1 to 4) are output through the voltage confirmation output connector (22c) and transmitted to the inspection controller (4).

Between the motor power input connector (20a) and the motor power output connector (22a) of the multilayer circuit board (10), a polarity relay (24) and link relay (26) for each channel, a current sensor (28), and a voltage confirmation unit (30) are provided. are arranged in a row, and are electrically connected to each other by forming a printed circuit pattern.

Therefore, the motor power (B+) applied to the motor power input connector (20a) passes through the polarity relay (24), link relay (26), current sensor (28), and voltage confirmation unit (30) to the motor control power (V1 ~ V4). ) is output through the motor power output connector 22a, and the motor power output connector 22a is electrically connected to the motors for each function per electric seat via a cable.

In the embodiment of the present invention, since the motor power is a high current such as 15V/30A, in order to prevent damage to the circuit board or circuit components due to electrical connection by the printed circuit pattern, the multilayer circuit board 10 is used as shown in FIG. 6. An electrical connection structure is adopted in which current is distributed equally for each layer (L1 to L4).

That is, distribution strip lines 40 are formed in a printed pattern on each layer (L1 to L4) of the multilayer circuit board 10 so that the high current of the motor power is distributed equally for each inspection channel of the multilayer circuit board 10, but are parallel to each other. It has a connected configuration.

More specifically, between the motor power input connector (20a) and the polarity relay 24 on the inspection channels (CH1 to CH4) of the multilayer circuit board 10, the polarity relay ( 24) and the link relay 26, and between the link relay 26 on the inspection channels (CH1 to CH4) and the motor power output connector 22a of the multilayer circuit board 10, are connected in parallel for current distribution of the motor power. The connected distribution strip lines 40 are formed in each layer (L1) (L2) (L3) (34) of the multilayer circuit board (10). In this case, it should be understood that the polarity relay 24 and the link relay 26 are connected to each layer through pinholes of the multilayer circuit board 10.

Then, if the multilayer circuit board 10 has four layers as shown in FIG. 6, the current is distributed at 7.3A and flows through the distribution strip line 40 of each layer (L1), (L2) (L3) (34), and thus overheating due to overcurrent. It eliminates the risk of damage or damage.

However, in the multilayer circuit board 10, the current sensor 28 and the voltage confirmation unit 30 are mounted only on the uppermost layer (L1) of the multilayer circuit board 10, and the output of the current sensor 28 and the current monitor output connector The strip line in the form of a printed pattern formed between (22b) and the strip line in the form of a printed pattern formed between the output of the voltage confirmation unit 30 and the voltage confirmation output connector (22c) is a relationship in which high current does not flow (not a line related to motor power). Printing is formed only on the uppermost layer (L1) of the multilayer circuit board 10.

In the present invention, relays 24 and 26 suitable for high current in a modular configuration are centrally distributed on the multilayer circuit board 10, which is reduced in size, as shown in FIG. 3, and furthermore, relays for each channel on the multilayer circuit board 10 ( 24) Among (26), the link relays 26 are installed close to each other with the current sensors 28 for each channel in order to miniaturize the board size (separation distance 5~10mm). In that case, the sensing current value of the current sensor 28 randomly fluctuates by 0.9 to 1A due to the magnetic field of the link relay 26, making the measured value of the current sensor 28 unreliable.

In order to ensure the reliability of the current sensor 28, there is a method of separating it from the relay 26 by more than 150 mm, but this is not suitable for miniaturizing the circuit board.

In the present invention, in order to secure the reliability of the current sensor 28 while keeping the relay 26 and the current sensor 28 close, as shown in FIG. 3, link relays 26 for each channel mounted on the multilayer circuit board 10 and The current sensors 28 for each channel are installed close to each other, but the current sensors 28 are spaced apart by a shielding magnetic barrier 16 that shields them from the magnetic field of the link relays 26.

The magnetic barrier wall 16 for shielding is formed across the channel-specific link relays 26 and the channel-specific current sensors 28 as shown in FIG. 5, and is screwed to the upper case 12 with a thickness of 0.5 to 1.2 mm. It is desirable to secure it by fastening.

When the multilayer circuit board 10 of the above-mentioned configuration constitutes the integrated unit box 6 per electric sheet configured to be built into the upper and lower cases 12 and 14, the inspection controller 4 performs the integrated unit box 6 per electric sheet. Each result data output from the unit box 6 is stored and provided for inspection by the inspector, and the performance pass/fail of the motors for each function provided in the automobile electric seat is determined by collecting and analyzing the result data.

When the inspection panel (2) for the electric seat inspection machine is configured with the configuration of the integrated unit box (6) per electric seat and the inspection controller (4) as in the present invention, field installation of the electric seat inspection machine on the automobile seat assembly line is possible. It is easy and minimizes the tester manufacturing period and inspection costs. Previously, the manufacturing period of the electric seat inspection machine took several weeks due to difficulties such as wiring connection work for relays, but with the present invention, it was possible to reduce it to 1 to 2 days.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be determined by the described embodiments, but by the claims and equivalents to the claims.

(2)-- Inspection panel for electric seat inspection machine (4)-- Inspection controller
(6)-- Integrated unit box per electric seat (10)-- Multilayer circuit board
(12)(14)-- Upper and lower case (16)-- Magnetic bulkhead for shielding
(18)-- Cooling fan (20a)(20b)(20c)(20d)-- Input connector
(22a)(22b)(22c)-- Output connector (24)-- Polarity relay
(26)-- Link relay (28)-- Current sensor
(30)-- Voltage check unit (34)-- Fan driving unit
(36)-- Fan connector (40)-- Distribution strip line

Claims (4)

In the electric seat inspection device that inspects the operation of motors for each function installed on the electric seat during the car seat assembly process,
An integrated unit box per electric seat equipped with a relay module having multiple inspection channels corresponding to each of the motors for each function mounted on a single automobile electric seat on an integrated multilayer circuit board and motor function inspection for each channel of multiple relay modules. Constructing an inspection panel for an electric seat inspection machine, including an inspection controller for control;
Each of the multiple inspection channels of the relay module of the integrated unit box per electric seat is formed on an integrated multilayer circuit board,
Polarity relays for each channel to select the (+) (-) polarity of the motor power for each function,
Link relays for each channel to select on and off the motor power applied to the motor for each function,
Current sensors for each channel to monitor the output current of the motor power applied to the motor for each function,
It is modularized and consists of voltage check units for each channel to check whether the voltage of the motor for each function is normal.
The current of the motor power is between the motor power input connector and the polarity relay on the inspection channel of the multilayer circuit board, between the polarity relay and the link relay on the inspection channel, and between the link relay on the inspection channel and the motor power output connector of the multilayer circuit board. An electric seat inspection device on an automobile seat assembly line, characterized in that distribution strip lines connected in parallel for distribution are formed for each layer of a multilayer circuit board.
According to claim 1, the link relays for each channel mounted on the multilayer circuit board and the current sensors for each channel are installed in close proximity to each other, but the current sensors are spatially separated by a shielding magnetic barrier provided to shield them from the magnetic fields of the link relays. An electric seat inspection device on a car seat assembly line, characterized by a.
The method of claim 1 or 2, wherein the multilayer circuit board includes a relay control connector through which a relay control signal from the inspection controller is input, a current monitoring connector for each channel connected to current sensors for each channel, and a current monitoring connector for each channel connected to voltage confirmation units for each channel. An electric seat inspection device on an automobile seat assembly line, further comprising a voltage check output connector.
In the electric seat inspection device that inspects the operation of motors for each function installed on the electric seat during the car seat assembly process,
An integrated unit box per electric seat equipped with a relay module having multiple inspection channels corresponding to each of the motors for each function installed in one automobile electric seat, and a test controller to control motor function inspection for each channel of multiple relay modules. Constructing an inspection team for an electric seat inspection machine, including;
The integrated unit box per electric seat is configured to form a relay module on a multi-layer circuit board in which relays for each channel for motor function inspection, current sensors, and voltage confirmation units are centrally arranged,
Relays and current sensors for each channel are spaced apart by magnetic partition walls for shielding within the upper and lower cases of the integrated unit box per electric seat,
An electric seat inspection device on an automobile seat assembly line, characterized in that distribution strip lines are formed in parallel to each layer of the multilayer circuit board so that high current of the motor power is distributed for each inspection channel of the multilayer circuit board.

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