CN222522526U - Signal transmission box, ISOFIX device and safety seat - Google Patents

Abstract

The application provides a signal transmission box, an ISOFIX device and a safety seat. The signal transmission box comprises a micro switch, a metal sheet and an extending hole, wherein the micro switch and the metal sheet are arranged in the signal transmission box, and the extending hole is formed in the side wall of the signal transmission box. The micro switch is used for outputting an electric signal, the micro switch is separated from or abutted against the metal sheet, the second direction of the micro switch pointing to the metal sheet is not collinear with and intersects with the first direction, and the extending hole is used for extending in the second end of the linkage rod. The linkage rod moves in a first direction, the first end is used for driving the locking piece to be in a locking state or an unlocking state, and the second end of the linkage rod drives the metal sheet to be separated from or abutted against the micro switch. The signal transmission box can facilitate the user to judge the locking state of the safety seat and reduce the assembly cost.

Description

Signal transmission box, ISOFIX device and safety seat

Technical Field

The application relates to the field of safety seats, in particular to a signal transmission box, an ISOFIX device and a safety seat.

Background

The safety seat is a safety protection system for children with different weights (or ages), is arranged in a vehicle, can effectively improve the riding safety of the children, can be fixed on a motor vehicle, and is composed of a safety belt component or a flexible component with ISOFIX (safety seat fixing system for children), an adjusting mechanism, accessories and the like. In the event of a vehicle collision or sudden deceleration, the impact on the child may be reduced and the child's body movement restricted to mitigate injury to them.

ISOFIX devices are typically mounted on either side of the rear end of the safety seat to mate with ISOFIX interfaces provided on the vehicle body. When the user installs and dismantles, inconvenient judgement safety full seat and the locking and the unblock state between the automobile body also bring inconvenience for the user's use when increasing the potential safety hazard.

Disclosure of utility model

The application provides a signal transmission box, an ISOFIX device and a safety seat, which are convenient for a user to judge the locking state of the safety seat and reduce the assembly cost.

Specifically, the application is realized by the following technical scheme:

In one aspect of the present application, there is provided a signal transmission box configured to be mounted side by side with an ISOFIX assembly including a locking member for fixing a safety seat to a vehicle body, including a locked state and an unlocked state, and a link lever having a first direction in a length direction, the link lever including a first end and a second end and being movable in the first direction, the locking member being connected to the first end of the link lever;

the signal transmission box comprises a micro switch, a metal sheet and an extending hole, wherein the micro switch and the metal sheet are arranged in the signal transmission box, and the extending hole is formed in the side wall of the signal transmission box;

The micro switch is used for outputting an electric signal, the micro switch is separated from or abutted against the metal sheet, the second direction of the micro switch pointing to the metal sheet is not collinear with and intersects with the first direction, and the extending hole is used for extending in the second end of the linkage rod;

The linkage rod moves in the first direction, the first end is used for driving the locking piece to be in a locking state or an unlocking state, and the second end of the linkage rod drives the metal sheet to be separated from or abutted to the micro switch.

In another aspect of the application, an ISOFIX device is provided, comprising the signal transmission box and an ISOFIX assembly;

ISOFIX subassembly, including gangbar and locking piece, the gangbar includes extension bar, extension bar fixed connection in the second end, the locking piece includes locking state and unlocking state, the locking piece is connected in first end;

The extension rod moves along with the linkage rod in the first direction, and the extension rod stretches into the signal transmission box through the stretching hole;

The linkage rod moves in the first direction, the first end drives the locking piece to be in a locking state or an unlocking state, and the extension rod drives the metal sheet to be separated from or abutted to the micro switch.

Optionally, in the second direction, the micro switch, the metal sheet and the extension bar are sequentially arranged, the metal sheet is movable relative to the micro switch, the extension bar comprises a first position and a second position, in the first position, the metal sheet is mutually separated from the micro switch, in the second position, the micro switch, the metal sheet and the extension bar are mutually abutted, along the direction that the first end points to the second end, the extension bar moves from the first position to the second position, and the extension bar pushes the metal sheet to be close to the micro switch.

Optionally, the metal sheet is fixed in the extension bar, the extension bar includes a first position and a second position, in the first position, the metal sheet is separated from the micro-gap switch, in the second position, the metal sheet is in the micro-gap switch butt, the extension bar moves from the first position to the second position, and the extension bar drives the metal sheet to be close to the micro-gap switch.

Optionally, the micro-gap switch is perpendicular to the extension bar, the sheetmetal is inclined to the extension bar, along the direction that first end pointed to the second end, the sheetmetal includes relative first side and second side, first side rotatable coupling is in the signal transmission box, and with the extension bar separation and relative position are fixed, the second side overlap joint is in the extension bar.

Optionally, the signal transmission box further comprises a circuit board, the circuit board is used for transmitting signals outwards, and the micro switch is electrically connected to the circuit board;

The micro switch is abutted with the metal sheet, the circuit of the circuit board is closed, signals are transmitted outwards, the micro switch is separated from the metal sheet, and the circuit of the circuit board is disconnected.

Optionally, the signal transmission box with ISOFIX subassembly sets up side by side, the signal transmission box includes towards ISOFIX subassembly stretches out the mounting hole, and passes the connecting piece of mounting hole, the mounting hole passes through the connecting piece will signal transmission box with ISOFIX subassembly fixed mounting.

Optionally, the signal transmission box is provided with a port, the port is electrically connected with the circuit board, and the port is used for connecting an external power supply with the circuit board.

Optionally, the linkage rod moves along the direction that the first end points to the second end, the first end drives the locking piece to be in an unlocking state, and the extension rod drives the metal sheet to be abutted with the micro switch;

The linkage rod moves along the direction that the second end points to the first end, the first end drives the locking piece to be in a locking state, and the extension rod drives the metal sheet to be separated from the micro switch.

In another aspect of the application there is provided a safety seat comprising an ISOFIX device for a safety seat as claimed in any one of the preceding claims.

The signal transmission box can judge the locking and unlocking states of the safety seat and the car body according to the electric signals. And, utilize sheetmetal and micro-gap switch subassembly, rather than using elastic component and micro-gap switch subassembly. And the second direction of the micro switch pointing to the metal sheet is not collinear with and intersects with the first direction, the position of the linkage rod does not need to be changed in the process of installing the signal transmission box, and the second end of the linkage rod is enabled to change the distance between the micro switch and the metal sheet in the signal transmission box by utilizing the displacement generated by switching the driving locking piece of the linkage rod between the locking state and the unlocking state. The signal transmission box can be manufactured independently and then assembled with the ISOFIX assembly, the process is simple and easy to operate, and the manufacturing cost can be saved. And is not affected by the size of the end of the linkage rod in the assembly process.

Drawings

FIG. 1 is a perspective view of a safety seat shown in an exemplary embodiment of the present application;

Fig. 2 is a perspective view of an ISOFIX device according to an exemplary embodiment of the present application;

FIG. 3 is an exploded view of an ISOFIX device shown in accordance with an exemplary embodiment of the present application;

FIG. 4 is a cross-sectional view of an ISOFIX device lock shown in accordance with an exemplary embodiment of the present application;

fig. 5 is a cross-sectional view of a signaling box according to an exemplary embodiment of the present application;

FIG. 6 is a partial schematic diagram of a signaling box according to an exemplary embodiment of the present application;

fig. 7 is an unlock cross-sectional view of an ISOFIX device according to an exemplary embodiment of the present application.

Detailed Description

The technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described herein with reference to the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.

If there are terms (e.g., upper, lower, left, right, front, rear, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, lateral, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.) related to directional indications or positional relationships in embodiments of the present application, such terms are used merely to explain the relative positional relationships, movement, etc. between the components at a particular pose (as shown in the drawings), and if the particular pose is changed, the directional indications or positional relationships are correspondingly changed. In addition, the terms "first", "second", etc. in the embodiments of the present application are used for descriptive convenience only and are not to be construed as indicating or implying relative importance.

In one prior embodiment, the spring is arranged at one end of the linkage rod, and the spring and the micro switch are used for opening or closing, so that the locking state is judged, and the connecting line direction of the spring and the micro switch is consistent with the length direction of the linkage rod. In the manufacturing process, in order to increase the spring on the manufactured ISOFIX assembly and reserve the distance between the spring and the micro switch, the position of the linkage rod needs to be moved on the original ISOFIX assembly, so that the installation space is reserved, the operation difficulty is high, and the cost is high. And the sizes of the linkage rods produced by different manufacturers have small differences, so that the assembly effect of the springs and the linkage rods is inconsistent.

In the present application, referring to fig. 1 to 3, a signal transmission box 100 is assembled with an ISOFIX assembly 20 mounted on a safety seat 10. The vehicle safety seat 10 is mounted to the vehicle body by ISOFIX assemblies 20, the ISOFIX assemblies 20 being distributed on both sides of the safety seat 10. The safety seat 10 further includes support legs 30, and the support legs 30 are supported after the safety seat 10 is fixed to the vehicle body. Referring to fig. 2, the isofix assembly 20 includes a telescoping member 21 and a fixed seat 22, the fixed seat 22 being fixed to the safety seat 10, the telescoping member 21 being received or extended within the fixed seat 22 relative to the safety seat 10. When the ISOFIX assembly 20 is used for mounting with a vehicle body, the telescopic piece 21 is extended from the fixed seat 22 and inserted into an ISOFIX interface of the vehicle body, so that the safety seat 10 is fixed with the vehicle body. Referring to fig. 3, the telescopic member 21 includes at least a housing 221 and a link lever 222, and the link lever 222 is surrounded by two housings 221 engaged with each other in the housing 221. The linkage bar 222 is movable relative to the housing 221.

Referring to fig. 5, a signaling box 100 is provided in the present application. Referring to fig. 2, the signal transfer cassette 100 is configured to be mounted side-by-side with the ISOFIX assembly 20. The ISOFIX assembly includes a linkage bar 222 and a lock 200. The lock 200 is used to fix the safety seat 10 to the vehicle body, and the lock 200 includes a locked state in which the safety seat is fixed to the vehicle body and an unlocked state in which the safety seat can be separated from the vehicle body. The length direction of the link lever 222 is a first direction (the direction of the double arrow in fig. 4), and the link lever 222 includes a first end 222a and a second end 222b, and is movable in the first direction, that is, movable with respect to the housing 221. The locking member 200 is coupled to a first end 222a of the linkage rod 222.

Referring to fig. 4 and 5, the signal transmission box 100 includes a micro switch 110, a metal sheet 120, and an insertion hole 130, where the micro switch 110 and the metal sheet 120 are disposed inside the signal transmission box 100, and the insertion hole 130 is formed on a side wall of the signal transmission box. The micro switch 110 is used for outputting an electrical signal, the micro switch 110 is separated from or abutted against the metal sheet 120, and the micro switch 110 can be connected in a circuit by a lead wire or can be directly connected to a circuit board. When the micro switch 110 is abutted against the metal sheet 120, a circuit communicating with the micro switch 110 is closed, and when the micro switch 110 is separated from the metal sheet 120, the circuit communicating with the micro switch 110 is opened. By closing and opening the circuit, an electrical signal can be transmitted to the central processor. The second direction of the micro switch 110 pointing to the metal sheet 120 is not collinear with and intersects the first direction, i.e. the length direction and the moving direction of the link lever 222, and is not parallel or coincident with the direction of the micro switch 110 pointing to the metal sheet 120, which is intersected. Due to the intersection, such movement of the linkage rod 222 in the first direction affects the distance between the micro switch and the metal sheet 120. The insertion hole 130 is used for inserting the second end 222b of the linkage rod 222 into the signal transmission box 100.

The linkage rod 222 moves in the first direction, the first end 222a is used for driving the locking piece 200 to be in a locking state or an unlocking state, and the second end 222b of the linkage rod 222 drives the metal sheet 120 to be separated from or abutted against the micro switch 110. When the linkage rod 222 moves along the direction that the first end 222a points to the second end 222b, the first end 222a is far away from the locking piece 200, and the second end 222b is close to the signal transmission box 100, so that the distance between the micro switch 110 and the metal sheet 120 is affected. Similarly, when the linkage rod 222 moves along the direction in which the second end 222b points toward the first end 222a, the distance between the micro switch 110 and the metal sheet 120 is also affected. Further, the locked state or the unlocked state of the lock 200 corresponds to the contact or disconnection between the microswitch 110 and the metal piece 120.

The micro switch 110 transmits an electrical signal to the central processor, and then the central processor can determine the locking and unlocking states of the safety seat and the car body according to the electrical signal. Also, the present application utilizes the sheet metal 120 and micro switch 110 assembly rather than using an elastic member in combination with the micro switch. In addition, the second direction of the micro switch 110 pointing to the metal sheet 120 is not collinear with and intersects with the first direction, the position of the linkage rod 222 does not need to be changed in the process of installing the signal transmission box, and the second end 222b of the linkage rod 222 is further enabled to change the distance between the micro switch 110 and the metal sheet 120 in the signal transmission box 100 by utilizing the displacement generated by the switching of the driving locking piece 200 of the linkage rod 222 between the locking state and the unlocking state. The signal transmission box 100 can be manufactured independently and then assembled with the ISOFIX assembly, and the process is simple and easy to operate, so that the manufacturing cost can be saved. And is not affected by the size of the end of the linkage rod 222 during assembly.

For example, when the second end 222b is far away from the locking member 200, and the locking member 200 is driven to be in the unlocked state, and the first end 222a of the linkage rod 222 is close to the signal transmission box 100, the distance between the metal sheets 120 of the micro switch 110 is reduced to be in contact with each other. At this time, the circuit connected with the micro switch 110 is closed, and an electric signal can be output outwards to be marked as a signal for unlocking the safety seat and the car body, so that a user can receive the unlocking signal and further take down the safety seat.

When the second end 222b approaches the locking member 200, and thus drives the locking member 200 to be in a locked state, and at the same time, the first end 222a of the linkage rod 222 is far away from the signal transmission box 100, so that the distance between the micro-switch 110 and the metal sheet 120 is increased, and the micro-switch 110 and the metal sheet 120 are separated from each other. At this time, the circuit connected with the micro switch 110 is disconnected, and the disconnected electric signal can be transmitted outwards, so that the signal is marked as a signal for locking the safety seat and the car body, and the user can receive the locking signal to judge that the fixing of the safety seat and the car body is completed.

Referring to fig. 3 and 4, the present application further provides an ISOFIX device, which includes the signal transmission box 100 and the ISOFIX assembly 20.ISOFIX subassembly 20 includes gangbar 222 and locking member 200, and gangbar 222 includes extension bar 2221, and extension bar 2221 fixed connection is in second end 222b, and locking member 200 includes locking state and unlocking state, locking member 200 is connected in first end 222a.

The extension bar 2221 moves in the first direction with the link lever 222, and the extension bar 2221 protrudes into the interior of the signal transmission case 100 through the protruding hole 130. The extension bar 2221 and the second end 222b of the linkage rod 222 may be riveted, screwed, welded, or integrally formed together. Avoiding that the distance between the micro switch 110 and the metal sheet 120 cannot be affected due to insufficient length of the original linkage rod 222.

The linkage bar 222 moves in a first direction, the first end 222a drives the lock 200 in a locked state or unlocked loading, and the extension bar 2221 drives the metal sheet 120 to be separated from or abutted against the micro switch 110. The ISOFIX device provided in this embodiment installs the signal transmission box 100 and the ISOFIX component together, stretches the extension bar 2221 into the signal transmission box 100 from the stretch-in hole 130, and the signal transmission box 100 can be fixed on the ISOFIX component by a threaded connection. The ISOFIX device can be installed on the safety seat, so that a user can conveniently judge the locking state of the safety seat and the vehicle body.

In an embodiment, referring to fig. 5, in the second direction, the micro switch 110, the metal plate 120 and the extension bar 2221 are sequentially arranged, and the metal plate 120 is movable relative to the micro switch 110, that is, the position of the metal plate 120 is changed to change the distance between the metal plate 120 and the micro switch 110. The extension bar 2221 includes a first position in which the metal plate 120 is separated from the micro switch 110, and a second position in which the micro switch 110, the metal plate 120, and the extension bar 2221 are abutted against each other, and the extension bar 2221 moves from the first position to the second position along the direction in which the first end 222a points to the second end 222b, and the extension bar 2221 pushes the metal plate 120 to approach the micro switch 110. In this embodiment, the micro switch 110, the metal sheet 120 and the extension bar 2221 are separately provided, and the extension bar 2221 moves from the first position to the second position, and the metal sheet 120 is pushed by the extension bar 2221, and moves from a position separated from the micro switch 110 to a position abutting against the micro switch 110. In this embodiment, as shown in fig. 5, the metal sheet 120 may be obliquely placed on the extension bar 2221, and the extension bar 2221 movably pushes the metal sheet 120. Alternatively, the extension bar 2221 may be formed in a shape having a size narrowed from a wide width along the direction in which the first end 222a is directed to the second end 222b, and the distance between the metal plate 120 and the micro switch 110 may be changed by the shape of the extension bar 2221 itself. In this embodiment, during the movement of the extension bar 2221, the metal sheet 120 and the micro switch 110 are separated from each other or are in point contact, so that the loss of the metal sheet and the micro switch is small.

In an embodiment, please refer to fig. 6, wherein the left view is the first position and the right view is the second position. The metal sheet 120 is fixed on the extension bar 2221, the extension bar 2221 includes a first position and a second position, in the first position, the metal sheet 120 is separated from the micro switch 110, in the second position, the metal sheet 120 is abutted against the micro switch 110, the extension bar 2221 moves from the first position to the second position, and the extension bar 2221 drives the metal sheet 120 to be close to the micro switch 110. The metal sheet 120 is fixed on the extension bar 2221, and the metal sheet 120 can move along with the movement of the extension bar 2221, so that the structure of the embodiment is simple.

Referring to fig. 5, in an embodiment, the signal transmission box 100 further includes a circuit board 150 inside for transmitting signals to the outside, and the micro switch 110 is electrically connected to the circuit board 150. The micro switch 110 is abutted against the metal sheet 120, the circuit of the circuit board 150 is closed, signals are transmitted outwards, the micro switch 110 is separated from the metal sheet 120, and the circuit of the circuit board 150 is disconnected. Compared with the micro switch 110 connected to an external circuit through a lead, the present embodiment directly adds the circuit board 150 in the signal transmission box 100, which can reduce the length of the lead, has higher mechanical strength, and avoids the risk of easy breakage, loosening, and short circuit of the lead. And the circuit board can reduce the complexity of the assembly wiring, reduce the cost of labor.

In a further embodiment, referring to fig. 4 and 5, the signal transmission box 100 is disposed side by side with the ISOFIX assembly 20, and the signal transmission box 100 includes a mounting hole 140 extending toward the ISOFIX assembly 20, and a connector passing through the mounting hole 140, and the mounting hole 140 fixedly mounts the signal transmission box 100 to the ISOFIX assembly 20 through the connector. The connector may be a screw, bolt, etc., and a worker may fix the signal transmission box 100 and the ISOFIX assembly 20 by passing the connector through the mounting hole 140 during the assembly process. The fixing mode is simple and easy to operate.

In an embodiment, referring to fig. 5, the signal transmission box 100 is provided with a port 160, the port 160 is electrically connected to the circuit board 150, and the port 160 is used for connecting an external power source with the circuit board 150, so as to energize the circuit board 150. In addition, a battery may be used to energize the circuit board 150. The port 160 is used, so that the universality is higher, and the replacement is easy.

In one embodiment, please refer to fig. 4 and 7. The linkage rod 222 moves along the direction that the first end 222a points to the second end 222b, the first end 222a drives the locking piece 200 to be in an unlocking state, and the extension rod 2221 drives the metal sheet 120 to be abutted with the micro switch 110;

The linkage rod 222 moves along the direction that the second end 222b points to the first end 222a, the first end 222a drives the locking piece 200 to be in a locking state, and the extension rod 2221 drives the metal sheet 120 to be separated from the micro switch 110.

Specifically, the locking member 200 includes a stopper rod 202, a transmission tension spring 201, and a locking plate 203. The drive tension spring 201 connects the second end 222a of the linkage rod 222 with the locking tab 203. One end of the limiting lock rod 202 and the linkage rod 222 are fixedly connected with each other, and can be clamped, and the other end of the limiting lock rod abuts against the surface of the locking plate 203. The notch in the locking tab 203 is engaged with a pin on the car body for locking or unlocking.

Referring to fig. 2 and 4, the isofix device includes a pressing unlocking member 23, in which the locking member is in the locked state in fig. 4, and the pressing of the unlocking member 23 is controlled to enable the linkage rod 222 to move along the direction of the first end 222a to the second end 222b, so that the limit lock rod 202 moves out of the L-shaped notch, and under the action of the transmission tension spring 201, the lock plate 203 is pulled to rotate anticlockwise until the limit lock rod 202 abuts against the arc surface of the lock plate 203. Meanwhile, the notch is separated from the pin of the car body, so that the unlocking of the safety seat and the car body is realized. The linkage rod 222 moves along the direction that the first end 222a points to the second end 222b, so that the extension rod 2221 movably drives the micro switch 110 and the metal sheet 120 to approach each other, then abuts against each other, and outputs an electrical signal to the central processor. The user can judge that the safety seat is unlocked with the car body.

Referring to fig. 7, in an unlocked state of the locking member 200, at this time, the transmission tension spring 201 is in a stressed state, the user pushes the safety seat to combine the notch of the locking plate 203 with the pin of the vehicle body, the process can rotate the locking plate 203 clockwise, the limit lock rod 202 slides from the arc surface of the locking plate 203 to the L-shaped notch of the locking plate 203, and under the action force of the shrinkage of the transmission tension spring 201, the limit lock rod 202 moves along the direction of the second end 222b pointing to the first end 222a, and simultaneously, the notch of the locking plate 203 is combined with the pin of the vehicle body to lock the safety seat with the vehicle body. The movement of the limit lock lever 202, the link lever 222, and the extension bar 2221 are identical, so that the link lever 222 and the extension bar 2221 also move in the direction in which the second end 222b points to the first end 222 a. The extension bar 2221 is movable to disengage the microswitch 110 from the metal plate 120 and transmit an open electrical signal to the central processor. The user can judge that the safety seat is locked with the car body.

In addition to the signal transmission box 100 and the locking member 200 described above, referring to fig. 2 and 4, the isofix assembly further includes a limiting pin 101 disposed on the telescopic member 21, and a slot 11 on the fixing base 22, where the limiting pin 101 is just clamped at the slot 11 of the fixing base when the telescopic member 21 is pushed out the longest distance.

The application also provides a safety seat comprising the ISOFIX device.

It should be noted that the technical solutions or technical features described in the above embodiments may be combined or supplemented with each other without generating a conflict. The scope of the present application is not limited to the exact construction described in the above embodiments and illustrated in the accompanying drawings, but modifications, equivalents, improvements, etc. that fall within the spirit and principle of the present application are intended to be included in the scope of the present application.

Claims (10)

1. A signal transmission box, characterized by being configured to be installed side by side with an ISOFIX assembly, the ISOFIX assembly comprising a locking member and a linkage rod, the locking member being used for fixing a safety seat with a vehicle body, the locking member comprising a locking state and an unlocking state, the length direction of the linkage rod being a first direction, the linkage rod comprising a first end and a second end and being movable in the first direction, the locking member being connected with the first end of the linkage rod;

the signal transmission box comprises a micro switch, a metal sheet and an extending hole, wherein the micro switch and the metal sheet are arranged in the signal transmission box, and the extending hole is formed in the side wall of the signal transmission box;

The micro switch is used for outputting an electric signal, the micro switch is separated from or abutted against the metal sheet, the second direction of the micro switch pointing to the metal sheet is not collinear with and intersects with the first direction, and the extending hole is used for extending in the second end of the linkage rod;

The linkage rod moves in the first direction, the first end is used for driving the locking piece to be in a locking state or an unlocking state, and the second end of the linkage rod drives the metal sheet to be separated from or abutted to the micro switch.

2. An ISOFIX device comprising the signal transmission cassette of claim 1 and an ISOFIX assembly;

ISOFIX subassembly, including gangbar and locking piece, the gangbar includes extension bar, extension bar fixed connection in the second end, the locking piece includes locking state and unlocking state, the locking piece is connected in first end;

The extension rod moves along with the linkage rod in the first direction, and the extension rod stretches into the signal transmission box through the stretching hole;

The linkage rod moves in the first direction, the first end drives the locking piece to be in a locking state or an unlocking state, and the extension rod drives the metal sheet to be separated from or abutted to the micro switch.

3. The ISOFIX apparatus of claim 2 wherein said microswitch, said metal sheet and said extension bar are sequentially disposed in said second orientation, said metal sheet being movable relative to said microswitch, said extension bar comprising a first position wherein said metal sheet is spaced from said microswitch and a second position wherein said microswitch, said metal sheet and said extension bar are in abutment with each other, said extension bar moving from said first position to said second position along said first end in a direction toward said second end, said extension bar pushing said metal sheet adjacent said microswitch.

4. The ISOFIX device of claim 2, wherein said metal sheet is fixed to said extension bar, said extension bar comprising a first position wherein said metal sheet is separated from said micro-switch and a second position wherein said metal sheet abuts said micro-switch, said extension bar moving from said first position to said second position, said extension bar moving said metal sheet closer to said micro-switch.

5. The ISOFIX apparatus of claim 3 wherein said microswitch is disposed vertically with respect to said extension bar, said metal sheet is disposed obliquely with respect to said extension bar in a direction of said first end toward said second end, said metal sheet includes opposite first and second sides, said first side being rotatably connected to said signal transmission box and spaced apart from and fixed in relative position with respect to said extension bar, said second side overlapping said extension bar.

6. The ISOFIX device of any of claims 2-5, wherein the interior of said signal transfer box further comprises a circuit board for transmitting signals outwardly, said micro-switch being electrically connected to said circuit board;

The micro switch is abutted with the metal sheet, the circuit of the circuit board is closed, signals are transmitted outwards, the micro switch is separated from the metal sheet, and the circuit of the circuit board is disconnected.

7. The ISOFIX apparatus of claim 6, wherein said signal transfer box is disposed side-by-side with said ISOFIX assembly, said signal transfer box including a mounting hole extending toward said ISOFIX assembly, and a connector passing through said mounting hole, said mounting hole fixedly mounting said signal transfer box to said ISOFIX assembly via said connector.

8. The ISOFIX device of claim 6, wherein said signal transmission box is provided with a port, said port being electrically connected to said circuit board, said port being adapted to interface an external power source to said circuit board.

9. The ISOFIX device of claim 2, wherein said linkage bar moves in a direction in which said first end points toward said second end, said first end driving said locking member in an unlocked state, said extension bar driving said metal sheet into abutment with said microswitch;

The linkage rod moves along the direction that the second end points to the first end, the first end drives the locking piece to be in a locking state, and the extension rod drives the metal sheet to be separated from the micro switch.

10. A safety seat comprising an ISOFIX device according to any one of claims 2 to 9.