Signal transmission box, ISOFIX device and safety seat

Abstract

The utility model provides a signal transmission box, an ISOFIX device and a safety seat. The signal transmission box comprises a microswitch, a metal sheet and an extending hole, the microswitch 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 microswitch is used for outputting electric signals, the microswitch is separated from or abuts against the metal sheet, the second direction, pointing to the metal sheet, of the microswitch is not collinear with the first direction and intersects with the first direction, and the extending-in hole is used for allowing the second end of the linkage rod to extend in. 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 abut against the microswitch. According to the signal transmission box, a user can conveniently judge the locking state of the safety seat, and the assembly cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of safety seats, and in particular to a signal transmission box, an ISOFIX device and a safety seat. Background Art

[0002] A safety seat is a child safety protection system that is designed for children of different weights (or ages) and installed in vehicles. It can effectively improve the safety of children in vehicles and can be fixed to motor vehicles. It is a child safety protection system composed of a seat belt assembly or flexible components, adjustment mechanisms, accessories, etc. with ISOFIX (child safety seat fixing system). In the event of a vehicle collision or sudden deceleration, it can reduce the impact pressure on children and restrict their body movement, thereby reducing their injuries.

[0003] The ISOFIX device is usually installed on both sides of the rear end of the safety seat and matches the ISOFIX interface set on the vehicle body. When the user installs and removes it, it is not convenient to judge the locking and unlocking status between the safety seat and the vehicle body, which increases safety risks and brings inconvenience to the user. Utility Model Content

[0004] The present application provides a signal transmission box, an ISOFIX device and a safety seat, which are convenient for users to judge the locking state of the safety seat and reduce assembly costs.

[0005] Specifically, the present application is implemented through the following technical solutions:

[0006] In one aspect of the present application, a signal transmission box is provided, which is configured to be installed side by side with an ISOFIX assembly, wherein the ISOFIX assembly includes a locking member and a linkage rod, wherein the locking member is used to fix the safety seat to the vehicle body, including a locked state and an unlocked state, wherein the length direction of the linkage rod is a first direction, wherein the linkage rod includes a first end and a second end and is movable in the first direction, and wherein the locking member is connected to the first end of the linkage rod;

[0007] The signal transmission box comprises a micro switch, a metal sheet and an insertion hole, wherein the micro switch and the metal sheet are arranged inside the signal transmission box, and the insertion hole is opened on a side wall of the signal transmission box;

[0008] The micro switch is used to output an electrical signal, the micro switch is separated from or abuts against the metal sheet, the second direction of the micro switch pointing to the metal sheet is not colinear with the first direction and intersects, and the insertion hole is used for the second end of the linkage rod to be inserted into;

[0009] The linkage rod moves in the first direction, the first end is used to drive the locking member to be in a locked state or an unlocked state, and the second end of the linkage rod drives the metal sheet to separate from or abut against the micro switch.

[0010] Another aspect of the present application provides an ISOFIX device, comprising the above-mentioned signal transmission box and an ISOFIX assembly;

[0011] The ISOFIX assembly comprises a linkage rod and a locking member, wherein the linkage rod comprises an extension rod, the extension rod is fixedly connected to the second end, the locking member comprises a locking state and an unlocking state, and the locking member is connected to the first end;

[0012] The extension rod moves along with the linkage rod in the first direction, and the extension rod extends into the interior of the signal transmission box through the insertion hole;

[0013] The linkage rod moves in the first direction, the first end drives the locking member to be in a locked state or an unlocked state, and the extension rod drives the metal sheet to separate from or abut against the micro switch.

[0014] Optionally, in the second direction, the microswitch, the metal sheet and the extension rod are arranged in sequence, and the metal sheet is movable relative to the microswitch; the extension rod includes a first position and a second position, in the first position, the metal sheet and the microswitch are separated from each other, in the second position, the microswitch, the metal sheet and the extension rod are abutted against each other, and along the direction from the first end to the second end, the extension rod moves from the first position to the second position, and the extension rod pushes the metal sheet close to the microswitch.

[0015] Optionally, the metal sheet is fixed to the extension rod, and the extension rod includes a first position and a second position. In the first position, the metal sheet is separated from the micro switch, and in the second position, the metal sheet abuts against the micro switch. The extension rod moves from the first position to the second position, and the extension rod drives the metal sheet close to the micro switch.

[0016] Optionally, the micro switch is vertically arranged relative to the extension rod, and the metal sheet is inclined relative to the extension rod, along the direction of the first end pointing to the second end, the metal sheet includes a first side and a second side relative to each other, the first side is rotatably connected to the signal transmission box, and is separated from the extension rod and fixed in relative position, and the second side is overlapped on the extension rod.

[0017] Optionally, the signal transmission box further includes a circuit board inside for transmitting signals to the outside, and the micro switch is electrically connected to the circuit board;

[0018] When the micro switch contacts the metal sheet, the circuit of the circuit board is closed and transmits a signal to the outside; when the micro switch separates from the metal sheet, the circuit of the circuit board is disconnected.

[0019] Optionally, the signal transmission box is arranged side by side with the ISOFIX component, and the signal transmission box includes a mounting hole extending toward the ISOFIX component, and a connecting piece passing through the mounting hole, and the mounting hole fixes the signal transmission box and the ISOFIX component through the connecting piece.

[0020] Optionally, the signal transmission box is provided with a port, the port is electrically connected to the circuit board, and the port is used to connect an external power source to the circuit board.

[0021] Optionally, the linkage rod moves in a direction from the first end to the second end, the first end drives the locking member to be in an unlocked state, and the extension rod drives the metal sheet to abut against the micro switch;

[0022] The linkage rod moves in a direction from the second end to the first end, the first end drives the locking member to be in a locked state, and the extension rod drives the metal sheet to separate from the micro switch.

[0023] Another aspect of the present application provides a safety seat, comprising the ISOFIX device of the safety seat described in any one of the above items.

[0024] The signal transmission box of the present application can determine the locked and unlocked states of the safety seat and the vehicle body based on the electrical signal. In addition, a metal sheet and a micro switch assembly are used instead of an elastic member and a micro switch assembly. In addition, the second direction of the micro switch pointing to the metal sheet is not colinear and intersects with the first direction. During the installation of the signal transmission box, there is no need to change the position of the linkage rod. The displacement generated by the driving locking member of the linkage rod switching between the locked state and the unlocked state is used to make the second end of the linkage rod change the distance between the micro switch and the metal sheet in the signal transmission box. The signal transmission box in the present application can be manufactured separately and then assembled with the ISOFIX assembly. The process is simple and easy to operate, which can save manufacturing costs. In addition, the assembly process will not be affected by the size of the end of the linkage rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a safety seat shown in an exemplary embodiment of the present application;

[0026] Figure 2 is a perspective view of an ISOFIX device shown in an exemplary embodiment of the present application;

[0027] Figure 3is an exploded view of an ISOFIX device shown in an exemplary embodiment of the present application;

[0028] Figure 4 is a cross-sectional view of an ISOFIX device locking device shown in an exemplary embodiment of the present application;

[0029] Figure 5 is a cross-sectional view of a signal transmission box shown in an exemplary embodiment of the present application;

[0030] Figure 6 is a partial schematic diagram of a signal transmission box shown in an exemplary embodiment of the present application;

[0031] Figure 7 It is a cross-sectional view of an unlocked ISOFIX device shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0032] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0033] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0034] In an existing embodiment, a spring is installed at one end of the linkage rod, and the locking state is determined by the opening or closing of the spring and the micro switch. Here, the connection 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 add a spring to the manufactured ISOFIX component and reserve the distance between the spring and the micro switch, it is necessary to move the position of the linkage rod on the original ISOFIX component to make room for installation, which is difficult to operate and costly. In addition, since the sizes of linkage rods produced by different manufacturers may be slightly different, the assembly effects of the spring and the linkage rod are inconsistent.

[0035] In this application, please refer to Figures 1 to 3The signal transmission box 100 is assembled with the ISOFIX assembly 20, and the ISOFIX assembly is installed on the safety seat 10. The vehicle safety seat 10 is installed with the vehicle body through the ISOFIX assembly 20, and the ISOFIX assembly 20 is distributed on both sides of the safety seat 10. The safety seat 10 also includes a support leg 30, and after the safety seat 10 is fixed to the vehicle body, the support leg 30 is propped up. Figure 2 The ISOFIX assembly 20 includes a telescopic member 21 and a fixing seat 22. The fixing seat 22 is fixed to the safety seat 10. The telescopic member 21 is stored or extended in the fixing seat 22 relative to the safety seat 10. When the ISOFIX assembly 20 is used to install the vehicle body, the telescopic member 21 is extended from the fixing seat 22 and inserted into the ISOFIX interface of the vehicle body, thereby fixing the safety seat 10 to the vehicle body. Figure 3 The telescopic member 21 at least includes a housing 221 and a linkage rod 222. The linkage rod 222 is surrounded by two housings 221 that are buckled with each other and is inside the housing 221. The linkage rod 222 can move relative to the housing 221.

[0036] Please refer to Figure 5 In the present application, a signal transmission box 100 is provided. Figure 2 The signal transmission box 100 is configured to be installed side by side with the ISOFIX assembly 20. The ISOFIX assembly includes a linkage rod 222 and a locking member 200. The locking member 200 is used to fix the safety seat 10 to the vehicle body. The locking member 200 includes a locked state and an unlocked state. In the locked state, the safety seat is fixed to the vehicle body. In the unlocked state, the safety seat can be separated from the vehicle body. The length direction of the linkage rod 222 is the first direction ( Figure 4 The linkage rod 222 includes a first end 222a and a second end 222b, and is movable in a first direction, that is, relative to the housing 221. The locking member 200 is connected to the first end 222a of the linkage rod 222.

[0037] Combination Figure 4 and Figure 5The signal transmission box 100 includes a micro switch 110, a metal sheet 120 and an insertion hole 130. The micro switch 110 and the metal sheet 120 are arranged inside the signal transmission box 100, and the insertion hole 130 is opened on the side wall of the signal transmission box. The micro switch 110 is used to output electrical signals. The micro switch 110 is separated from or abutted against the metal sheet 120. The micro switch 110 can be connected in the circuit with an extended lead, or can be directly connected to the circuit board. When the micro switch 110 and the metal sheet 120 are abutted, the circuit connected to the micro switch 110 is closed. When the micro switch 110 and the metal sheet 120 are separated, the circuit connected to the micro switch 110 is disconnected. Through the closing and disconnection of the circuit, the 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 the first direction and intersects, that is, the length direction and the movement direction of the linkage rod 222 are not parallel or coincident with the direction of the micro switch 110 pointing to the metal sheet 120, but intersect. Due to the intersection, the movement of the linkage rod 222 along the first direction will affect the distance between the micro switch and the metal sheet 120. The insertion hole 130 is used for the second end 222b of the linkage rod 222 to be inserted into the signal transmission box 100.

[0038] The linkage rod 222 moves in a first direction, and the first end 222a is used to drive the locking member 200 to be in a locked state or an unlocked state, and the second end 222b of the linkage rod 222 drives the metal sheet 120 to separate from or abut against the micro switch 110. When the linkage rod 222 moves in a direction from the first end 222a to the second end 222b, the first end 222a is away from the locking member 200, and the second end 222b is close to the signal transmission box 100, which affects the distance between the micro switch 110 and the metal sheet 120. Similarly, when the linkage rod 222 moves in a direction from the second end 222b to the first end 222a, the distance between the micro switch 110 and the metal sheet 120 is also affected. Then, the locked state or unlocked state of the locking member 200 corresponds to the abutment or disconnection of the micro switch 110 and the metal sheet 120.

[0039] The micro switch 110 transmits an electrical signal to the central processor, and then the central processor can determine the locking and unlocking status of the safety seat and the vehicle body based on the electrical signal. In addition, the present application utilizes a metal sheet 120 and a micro switch 110 assembly, rather than a combination of an elastic member and a micro switch. In addition, the second direction of the micro switch 110 pointing to the metal sheet 120 is not colinear and intersects with the first direction. In the process of installing the signal transmission box, it is not necessary to change the position of the linkage rod 222. The displacement generated by the driving locking member 200 of the linkage rod 222 switching between the locked state and the unlocked state, thereby causing the second end 222b of the linkage rod 222 to change the distance between the micro switch 110 and the metal sheet 120 in the signal transmission box 100. In the present application, the signal transmission box 100 can be manufactured separately and then assembled with the ISOFIX assembly. The process is simple and easy to operate, and can save manufacturing costs. In addition, the size of the end of the linkage rod 222 will not be affected during the assembly process.

[0040] For example, when the second end 222b is away from the locking member 200, the locking member 200 is driven to be in the unlocked state, and at the same time, the first end 222a of the linkage rod 222 is close to the signal transmission box 100, so that the distance between the metal sheet 120 of the micro switch 110 is reduced to abut each other. At this time, the circuit connected to the micro switch 110 is closed, and an electrical signal can be output to the outside, which is marked as a signal that the safety seat is unlocked from the vehicle body, and the user can receive the unlocking signal and then take off the safety seat.

[0041] When the second end 222b approaches the locking member 200, the locking member 200 is driven to be in a locked state, and at the same time, the first end 222a of the linkage rod 222 moves away from the signal transmission box 100, so that the distance between the micro switch 110 and the metal sheet 120 increases, thereby separating the micro switch 110 from the metal sheet 120. At this time, the circuit connected to the micro switch 110 is disconnected, and a disconnected electrical signal can be transmitted to the outside, which is then marked as a signal that the safety seat is locked with the vehicle body. The user can receive the locking signal and determine that the safety seat is fixed to the vehicle body.

[0042] Please combine Figure 3 and Figure 4 The present application also provides an ISOFIX device, including the above-mentioned signal transmission box 100 and an ISOFIX assembly 20. The ISOFIX assembly 20 includes a linkage rod 222 and a locking member 200, the linkage rod 222 includes an extension rod 2221, the extension rod 2221 is fixedly connected to the second end 222b, the locking member 200 includes a locked state and an unlocked state, and the locking member 200 is connected to the first end 222a.

[0043] The extension rod 2221 moves along with the linkage rod 222 in the first direction, and the extension rod 2221 extends into the signal transmission box 100 through the insertion hole 130. The extension rod 2221 and the second end 222b of the linkage rod 222 can be fixed together by riveting, screwing, welding or integral molding, etc., so as to avoid that the original linkage rod 222 is not long enough to affect the distance between the micro switch 110 and the metal sheet 120.

[0044] The linkage rod 222 moves in the first direction, the first end 222a drives the locking member 200 to be in a locked state or unlocked, and the extension rod 2221 drives the metal sheet 120 to separate from or abut against the micro switch 110. The ISOFIX device provided in this embodiment installs the signal transmission box 100 and the ISOFIX assembly together, extends the extension rod 2221 into the signal transmission box 100 from the insertion hole 130, and the signal transmission box 100 can be fixed to the ISOFIX assembly through a threaded connector. The ISOFIX device can be installed on a safety seat, which is convenient for users to judge the locking state of the safety seat and the vehicle body.

[0045] In one embodiment, in combination Figure 5 In the second direction, the micro switch 110, the metal sheet 120 and the extension rod 2221 are arranged in sequence, and the metal sheet 120 is movable relative to the micro switch 110, that is, the position of the metal sheet 120 changes and thus changes the distance between the metal sheet 120 and the micro switch 110. The extension rod 2221 includes a first position and a second position. In the first position, the metal sheet 120 and the micro switch 110 are separated from each other. In the second position, the micro switch 110, the metal sheet 120 and the extension rod 2221 abut against each other. In the direction from the first end 222a to the second end 222b, the extension rod 2221 moves from the first position to the second position, and the extension rod 2221 pushes the metal sheet 120 close to the micro switch 110. In this embodiment, the micro switch 110, the metal sheet 120 and the extension rod 2221 are separately arranged. When the extension rod 2221 moves from the first position to the second position, the metal sheet 120 is pushed by the extension rod 2221, and moves from a position separated from the micro switch 110 to a position abutting against the micro switch 110. Figure 5 As shown, the metal sheet 120 is placed obliquely on the extension rod 2221, and the extension rod 2221 moves to push the metal sheet 120. Alternatively, the extension rod 2221 is processed into a shape with a size that changes from wide to narrow along the direction from the first end 222a to the second end 222b, and the distance between the metal sheet 120 and the micro switch 110 is changed by the shape of the extension rod 2221 itself. In this embodiment, during the movement of the extension rod 2221, the metal sheet 120 and the micro switch 110 are separated from each other or in point contact, and the loss of the metal sheet and the micro switch is small.

[0046] In one embodiment, please combine Figure 6 The left picture shows the first position, and the right picture shows the second position. The metal sheet 120 is fixed to the extension rod 2221. The extension rod 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 abuts against the micro switch 110. The extension rod 2221 moves from the first position to the second position, and the extension rod 2221 drives the metal sheet 120 close to the micro switch 110. The metal sheet 120 is fixed to the extension rod 2221, and the metal sheet 120 can move with the movement of the extension rod 2221. The structure of this embodiment is simple.

[0047] Combination Figure 5 In one embodiment, the interior of the signal transmission box 100 further includes a circuit board 150 for transmitting signals to the outside, and the micro switch 110 is electrically connected to the circuit board 150. The micro switch 110 abuts against the metal sheet 120, the circuit of the circuit board 150 is closed, and the signal is transmitted to the outside, 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 being connected to the external circuit through a lead, this embodiment directly adds a circuit board 150 to the signal transmission box 100, which can reduce the length of the lead, has higher mechanical strength, and avoids the risk of the lead being easily broken, loose, and short-circuited. In addition, the circuit board can reduce the complexity of assembly wiring and reduce labor costs.

[0048] In another embodiment, in combination Figure 4 and Figure 5 The signal transmission box 100 and the ISOFIX assembly 20 are arranged side by side. 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. The mounting hole 140 fixes the signal transmission box 100 and the ISOFIX assembly 20 through the connector. The connector can be a screw, a bolt or other parts. During the assembly process, the worker can fix the signal transmission box 100 and the ISOFIX assembly 20 by passing the connector through the mounting hole 140. The fixing method is simple and easy to operate.

[0049] In one embodiment, in combination Figure 5 The signal transmission box 100 is provided with a port 160, which is electrically connected to the circuit board 150. The port 160 is used to connect an external power source to the circuit board 150, thereby powering the circuit board 150. In addition, a battery can also be used to power the circuit board 150. The use of the port 160 is more versatile and easy to replace.

[0050] In one embodiment, please combine Figure 4 and Figure 7The linkage rod 222 moves in a direction from the first end 222a to the second end 222b, the first end 222a drives the locking member 200 to be in an unlocked state, and the extension rod 2221 drives the metal sheet 120 to abut against the micro switch 110;

[0051] The linkage rod 222 moves in a direction from the second end 222 b to the first end 222 a , the first end 222 a drives the locking member 200 to be in a locked state, and the extension rod 2221 drives the metal sheet 120 to separate from the micro switch 110 .

[0052] Specifically, the locking member 200 includes a limit lock rod 202, a transmission tension spring 201 and a lock plate 203. The transmission tension spring 201 connects the second end 222a of the linkage rod 222 with the lock plate 203. One end of the limit lock rod 202 is fixedly connected to the linkage rod 222, which may be a clamping connection, and the other end abuts against the surface of the lock plate 203. The notch on the lock plate 203 is combined with a pin on the vehicle body for locking or unlocking.

[0053] Combination Figure 2 and Figure 4 The ISOFIX device includes a push-release member 23, Figure 4 The middle is the locked state of the locking member. By controlling and pressing the unlocking member 23, the linkage rod 222 can move in the direction from the first end 222a to the second end 222b. The limit lock rod 202 moves out of the L-shaped cutout. Under the force of the transmission tension spring 201, the lock plate 203 is pulled counterclockwise until the limit lock rod 202 abuts against the arc surface of the lock plate 203. At the same time, the notch and the pin of the vehicle body are separated from each other, and the safety seat is unlocked from the vehicle body. The linkage rod 222 moves in the direction from the first end 222a to the second end 222b, so that the extension rod 2221 moves to drive the micro switch 110 and the metal sheet 120 to approach each other, and then abut, and output an electrical signal to the central processor. The user can then determine that the safety seat is unlocked from the vehicle body.

[0054] Combination Figure 7, the locking member 200 is in an unlocked state. 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. This process causes the locking plate 203 to rotate clockwise, and the limit lock rod 202 slides from the arc surface of the locking plate 203 to the L-shaped cutout of the locking plate 203. Under the force of the contraction of the transmission tension spring 201, the limit lock rod 202 moves in the direction from the second end 222b to the first end 222a. At the same time, the notch of the locking plate 203 combines with the pin of the vehicle body to lock the safety seat with the vehicle body. The limit lock rod 202, the linkage rod 222 and the extension rod 2221 move in the same way, so the linkage rod 222 and the extension rod 2221 also move in the direction from the second end 222b to the first end 222a. The movement of the extension rod 2221 separates the micro switch 110 from the metal sheet 120, and transmits a disconnection electrical signal to the central processor. The user can then determine whether the safety seat is locked to the vehicle body.

[0055] In addition to the signal transmission box 100 and the locking member 200 described above, Figure 2 and Figure 4 The ISOFIX assembly also includes a limit stop pin 101 arranged on the telescopic member 21 and a slot 11 on the fixing seat 22. When the telescopic member 21 is pushed out to the longest distance, the limit stop pin 101 is just stuck in the slot 11 of the fixing seat.

[0056] The present application also provides a safety seat, comprising any of the ISOFIX devices described above.

[0057] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A signal transmission box, characterized in that: The ISOFIX assembly is configured to be installed side by side with the safety seat, the ISOFIX assembly includes a locking member and a linkage rod, the locking member is used to fix the safety seat to the vehicle body, including a locked state and an unlocked state, the length direction of the linkage rod is a first direction, the linkage rod includes a first end and a second end, and is movable in the first direction, the locking member is connected to the first end of the linkage rod; The signal transmission box comprises a micro switch, a metal sheet and an insertion hole, wherein the micro switch and the metal sheet are arranged inside the signal transmission box, and the insertion hole is opened on a side wall of the signal transmission box; The micro switch is used to output an electrical signal, the micro switch is separated from or abuts against the metal sheet, the second direction of the micro switch pointing to the metal sheet is not colinear with the first direction and intersects, and the insertion hole is used for the second end of the linkage rod to be inserted into; The linkage rod moves in the first direction, the first end is used to drive the locking member to be in a locked state or an unlocked state, and the second end of the linkage rod drives the metal sheet to separate from or abut against the micro switch.

2. An ISOFIX device, characterized in that: The device comprises the signal transmission box and ISOFIX assembly as claimed in claim 1; The ISOFIX assembly comprises a linkage rod and a locking member, wherein the linkage rod comprises an extension rod, the extension rod is fixedly connected to the second end, the locking member comprises a locking state and an unlocking state, and the locking member is connected to the first end; The extension rod moves along with the linkage rod in the first direction, and the extension rod extends into the interior of the signal transmission box through the insertion hole; The linkage rod moves in the first direction, the first end drives the locking member to be in a locked state or an unlocked state, and the extension rod drives the metal sheet to separate from or abut against the micro switch.

3. The ISOFIX device according to claim 2, characterized in that: In the second direction, the micro switch, the metal sheet and the extension rod are arranged in sequence, and the metal sheet is movable relative to the micro switch; the extension rod includes a first position and a second position, in the first position, the metal sheet and the micro switch are separated from each other, in the second position, the micro switch, the metal sheet and the extension rod are abutted against each other, and along the direction from the first end to the second end, the extension rod moves from the first position to the second position, and the extension rod pushes the metal sheet close to the micro switch.

4. The ISOFIX device according to claim 2, characterized in that: The metal sheet is fixed to the extension rod, and the extension rod includes a first position and a second position. In the first position, the metal sheet is separated from the micro switch, and in the second position, the metal sheet abuts against the micro switch. The extension rod moves from the first position to the second position, and the extension rod drives the metal sheet to approach the micro switch.

5. The ISOFIX device according to claim 3, characterized in that: The micro switch is vertically arranged relative to the extension rod, and the metal sheet is inclined relative to the extension rod, along the direction of the first end pointing to the second end. The metal sheet includes a first side and a second side opposite to each other, the first side is rotatably connected to the signal transmission box, and is separated from the extension rod and fixed in relative position, and the second side is overlapped on the extension rod.

6. The ISOFIX device according to any one of claims 2 to 5, characterized in that: The signal transmission box also includes a circuit board inside, which is used to transmit signals to the outside, and the micro switch is electrically connected to the circuit board; When the micro switch abuts against the metal sheet, the circuit of the circuit board is closed and transmits a signal to the outside; when the micro switch is separated from the metal sheet, the circuit of the circuit board is disconnected.

7. The ISOFIX device according to claim 6, characterized in that: The signal transmission box is arranged side by side with the ISOFIX component. The signal transmission box includes a mounting hole extending toward the ISOFIX component, and a connector passing through the mounting hole. The mounting hole fixes the signal transmission box and the ISOFIX component through the connector.

8. The ISOFIX device according to claim 6, characterized in that: The signal transmission box is provided with a port, the port is electrically connected to the circuit board, and the port is used to connect an external power source to the circuit board.

9. The ISOFIX device according to claim 2, characterized in that: The linkage rod moves in a direction from the first end to the second end, the first end drives the locking member to be in an unlocked state, and the extension rod drives the metal sheet to abut against the micro switch; The linkage rod moves in a direction from the second end to the first end, the first end drives the locking member to be in a locked state, and the extension rod drives the metal sheet to separate from the micro switch.

10. A safety seat, characterized in that: The ISOFIX device comprises the ISOFIX device according to any one of claims 2 to 9.

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