Safety belt cutting device

Abstract

A safety belt cutting device comprises a shell, and a containing groove used for containing a safety belt is formed in the shell. The cutter is installed on the shell and can move along the containing groove, so that the safety belt contained in the containing groove is cut; and the limiting mechanism comprises a movable limiting block, the movable limiting block is arranged on the shell, the movable limiting block moves between a limiting position and a limiting releasing position, and when the movable limiting block is located at the limiting position, the limiting mechanism limits the safety belt to move out of the containing groove. Therefore, when the safety belt enters the safety belt containing groove, the movable limiting block can be moved to the limiting releasing position, movement of the safety belt is prevented from being hindered, and therefore the safety belt can easily enter the safety belt containing groove, and the operation difficulty is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety belt cutting device. BACKGROUND

[0002] The safety belt cutting device is an emergency rescue tool, which is usually used to quickly cut off the safety belt to rescue the trapped personnel in a vehicle accident. The design purpose of this tool is to provide rapid and effective help in an emergency, especially when the vehicle is deformed or the electrical system fails, causing the electric safety belt release mechanism to fail to work.

[0003] At present, there are various safety belt cutting devices on the market, and these safety belt cutting devices have room for improvement in terms of reducing the operation difficulty and improving the operation efficiency.

[0004] For example, there is a safety belt cutting device in the prior art: it has a long strip-shaped accommodating groove for accommodating the safety belt, and the accommodating groove has an opening at one end through which the safety belt can enter the accommodating groove. In addition, a protrusion is provided near the opening in the accommodating groove, and the safety belt entering the accommodating groove can be limited by the protrusion and the bottom wall of the accommodating groove to easily perform the cutting operation of the safety belt.

[0005] However, the safety belt needs to pass over the protrusion to enter the accommodating groove, so that the operation of the safety belt entering the accommodating groove becomes more difficult, and therefore this safety belt cutting device has room for improvement in terms of reducing the operation difficulty. SUMMARY

[0006] Therefore, the utility model provides a safety belt cutting device which can reduce the operation difficulty.

[0007] The present application provides a safety belt cutting device, which comprises a housing, a housing accommodating groove for accommodating the safety belt; a cutter, the cutter is installed on the housing and can move along the accommodating groove, so as to cut the safety belt accommodated in the accommodating groove; and a limiting mechanism, the limiting mechanism comprises a movable limiting block, the movable limiting block is arranged on the housing, and the movable limiting block moves between the limiting position and the release position, when the movable limiting block is located at the limiting position, the limiting mechanism limits the safety belt to move out of the accommodating groove.

[0008] With the above structure, when the safety belt enters the safety belt accommodating groove, the movable limiting block can be moved to the release position to avoid hindering the movement of the safety belt, so that the safety belt can easily enter the safety belt accommodating groove, reducing the operation difficulty.

[0009] In addition, when the cutter cuts the safety belt in the accommodating groove, the movable limiting block can be in the limiting position, and the limiting mechanism limits the safety belt. Thus, the operation difficulty can be reduced when the safety belt is cut. Meanwhile, the movable limiting block in the limiting position limits the safety belt from moving out of the accommodating groove when cutting, and the safety belt is limited in the accommodating groove, so that the cutting can be easily performed, the cutting effect is not affected, and the cutting efficiency is improved.

[0010] In summary, the movable limiting block is provided, the safety belt can be easily put into the safety belt accommodating groove by moving the movable limiting block to the limiting releasing position, the operation difficulty is reduced, and the operation efficiency is improved. The movable limiting block is moved to the limiting position, and the safety belt cutting effect is good.

[0011] As a possible implementation, the accommodating groove has a first side wall and a second side wall arranged oppositely, the movable limiting block is arranged on the first side wall, the movable limiting block is close to the second side wall when the movable limiting block is in the limiting position, and the movable limiting block is away from the second side wall when the movable limiting block is in the releasing position.

[0012] With the above structure, the movable limiting block moves between the limiting position and the releasing position by being close to or away from the second side wall. Since the movable limiting block is arranged on the first side wall, the size of the safety belt cutting device can be reduced, and miniaturization is facilitated.

[0013] As a possible implementation, the thickness of the safety belt is defined as a, the distance between the movable limiting block and the second side wall when the movable limiting block is in the limiting position is defined as b, and 0≤b

[0014] With the above structure, the safety belt can be reliably prevented from passing over the movable limiting block, so that the safety belt can be stably and reliably limited.

[0015] As a possible implementation, the movable limiting block is in sliding connection with the shell.

[0016] With the above structure, the movable limiting block is in sliding connection with the shell, so that the movable limiting block can move more smoothly between the limiting position and the contact limiting position.

[0017] As a possible implementation, the limiting mechanism further includes a force applying member, the force applying member moves the movable limiting block from the releasing position to the limiting position.

[0018] By adopting the above structure, the movable limiting block is forced to the limiting position by the force applying member, so that the movable limiting block can be forced to the limiting position to limit the safety belt during cutting without manual driving, and the force applying member can ensure that the movable limiting block is in the limiting position to limit the safety belt, thereby reducing the operation difficulty of the safety belt cutting device.

[0019] The force applying member can be a spring, but can also be other structures, such as a rubber block.

[0020] As one possible implementation, the movable limiting block has a stop portion for stopping and limiting the safety belt, and the movement track of the cutter at least partially overlaps the stop portion.

[0021] By adopting the above structure, the safety belt can be blocked from moving out of the accommodating groove, improving the cutting effect of the safety belt.

[0022] As one possible implementation, the movable limiting block is provided with a limiting portion for stopping and limiting the cutter, and the movement track of the cutter at least partially overlaps the limiting portion.

[0023] By adopting the above structure, since the movement track of the cutter at least partially overlaps the limiting portion on the movable limiting block, the cutter can completely cut off the safety belt.

[0024] As one possible implementation, the accommodating groove is a slot, and the movable limiting block is close to the slot opening of the slot.

[0025] By adopting the above structure, since the movable limiting block is close to the slot opening, the accommodating groove can be made shorter, which is beneficial to the miniaturization of the safety belt cutting device.

[0026] As one possible implementation, the slot opening is in the shape of an expanding flange.

[0027] Thus, by setting the slot opening in the shape of an expanding flange, the safety belt can be conveniently guided into the accommodating groove through the slot opening. Thus, the operation difficulty of the safety belt cutting device can be reduced.

[0028] As one possible implementation, the accommodating groove has oppositely arranged first and second side walls, the movable limiting block is arranged on the first side wall, one end of the movable limiting block towards the second side wall has a bevel portion, and the bevel portion gradually inclines towards the second side wall from the slot opening to the bottom wall of the accommodating groove.

[0029] By adopting the above structure, when the safety belt is guided into the accommodating groove through the slot opening, the force between the safety belt and the movable limiting block can be partially decomposed to the direction of driving the movable limiting block to move from the limiting position to the releasing position after the safety belt abuts against the bevel portion. Thus, the safety belt can drive the movable limiting block to move from the limiting position to the releasing position, thereby conveniently guiding the safety belt into the accommodating groove through the opening.

[0030] As a possible implementation, the inclination of the housing near the notch and the side edge part of the movable limiting block when the limiting position is released is defined as c,

[0031] The inclination of the inclined surface part is defined as d, d≤c.

[0032] Thus, since the inclination of the housing near the notch is greater than or equal to the inclination of the inclined surface part, the safety belt can be easily made to enter the receiving groove from the notch.

[0033] Here, the inclination can be represented by an angle with respect to the length direction of the receiving groove, for example.

[0034] As a possible implementation, the cutter can be moved along the length direction of the receiving groove from the first moving position to the second moving position to cut the safety belt, and when the cutter is in the first moving position, the blade part of the cutter is farther away from the notch with respect to the bottom wall of the receiving groove.

[0035] Thus, an acceleration space can be left between the cutter and the safety belt in the receiving groove, so that when the cutter is moved from the first moving position to the second moving position, the cutter can accelerate before contacting the safety belt in the receiving groove, so that the cutter obtains greater speed and kinetic energy, and the cutter can cut the safety belt more quickly and smoothly. Thus, the cut of the safety belt can be more smooth, thereby improving the cutting effect and cutting efficiency of the safety belt, and inhibiting the occurrence of the situation that the cutter needs to be repeatedly cut.

[0036] As a possible implementation, the cutter can be moved along the length direction of the receiving groove from the first moving position to the second moving position, and a hollow part is provided on the housing, and the hollow part at least partially coincides with the cutter in the first moving position.

[0037] Thus, the state of the cutter can be easily observed through the hollow part when the cutter is in the first moving position to confirm whether the cutter has problems such as rusting, damage, etc. that may affect the cutting effect. In addition, by providing the hollow part, impurities such as debris can enter the housing, and when the movement of the cutter is affected, the impurities can be cleaned through the hollow part to ensure the normal operation of the safety belt cutting device, thereby improving the reliability and stability of the safety belt cutting device.

[0038] As a possible implementation, it further comprises: an ejection structure provided on the housing and connected with the cutter, for moving the cutter along the receiving groove.

[0039] With the above structure, the cutter is moved by the ejection structure, so that the impact force can be increased, and the safety belt can be easily cut.

[0040] As a possible implementation, the ejection structure comprises: a sliding block slidingly connected in the housing, the cutter being fixed on the sliding block, the sliding block being provided with a first mounting hole; a first spring, one end of the first spring being in abutment with the sliding block and the other end being in abutment with the housing, the first spring driving the sliding block to slide so as to drive the cutter to move along the length direction of the accommodating groove from the first moving position to the second moving position; a clamping block, the clamping block being installed in the first mounting hole and moving along a direction perpendicular to the length direction of the accommodating groove; a clamping head, the clamping head being provided on the housing; a second spring, one end of the second spring being in abutment with the inner wall of the first mounting hole and the other end being in abutment with the clamping block, the second spring pushing the clamping block to extend out of the first mounting hole so that the clamping block is clamped on the clamping head to keep the cutter at the first moving position; a button, the button being movably connected on the housing, when the button is connected with the clamping block, the button drives the clamping block to retract into the first mounting hole against the action force of the second spring to release the clamping, a first inclined surface being provided on the clamping head and a second inclined surface being provided on the clamping block, the first inclined surface and the second inclined surface being set so that when the cutter moves from the second moving position to the first moving position, the first inclined surface and the second inclined surface slide in contact to make the clamping block retract into the first mounting hole.

[0041] With the above structure, the ejection structure can be stably actuated by the sliding block and the like, in addition, the ejection structure can be stably kept at the initial position (the position without ejection) by the clamping block and the like, and the ejection structure can be released at the appropriate time by the button and the like, so that the safety belt can be well cut.

[0042] The hollow part can be located on the extension line of the long-shaped accommodating groove and have the same width as the accommodating groove.

[0043] With the above structure, the hollow part is located on the extension line of the accommodating groove and has the same width as the accommodating groove, so that the design and processing difficulty of the accommodating groove and the hollow part can be reduced.

[0044] As a possible implementation, a blocking separation part is arranged between the accommodating groove and the hollow part.

[0045] With the above structure, the accommodating groove and the hollow part can be separated by the blocking separation part, so that the design and processing difficulty of the accommodating groove and the hollow part can be reduced.

[0046] As a possible implementation, the safety belt cutting device further comprises a lighting lamp, the lighting lamp being provided on the housing.

[0047] With the above structure, the lighting lamp can emit light beams outward, so that the safety belt cutting device can be used for lighting, thereby increasing the function of the safety belt cutting device.

[0048] As a possible implementation, the safety belt cutting device further comprises a switch, which is arranged on the shell and is electrically connected with the illuminating lamp to control the illuminating lamp to be always on or to flash.

[0049] With the above structure, the safety belt cutting device can be used for illumination by controlling the illuminating lamp to be always on through the switch. The illuminating lamp can flash to send a reminder signal when needed by controlling the illuminating lamp to flash through the switch. Thus, the use range of the safety belt cutting device can be increased.

[0050] As a possible implementation, the safety belt cutting device further comprises a window breaking cone, which is arranged on the shell.

[0051] With the above structure, the window breaking cone is arranged on the shell, so that the window can be broken through the window breaking cone on the shell in an emergency such as when the door cannot be opened. Thus, the use range of the safety belt cutting device can be increased.

[0052] These and other aspects of the present application will become more apparent from the following description of some embodiments, given by way of example only, with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0053] The various technical features of the present application and the relationship between them will be further described below with reference to the accompanying drawings. The drawings are exemplary, some technical features are not shown in actual proportion, and some technical features in the drawings can be omitted, which are conventional in the technical field to which the present application belongs and are not essential for understanding and implementing the present application, or additional technical features are shown, which are not essential for understanding and implementing the present application. That is, the combination of various technical features shown in the drawings is not used to limit the present application. In addition, the same reference signs refer to the same contents throughout the present application. The specific drawings are as follows:

[0054] Figure 1 It is a schematic diagram of the three-dimensional structure of the safety belt cutting device;

[0055] Figure 2 It is Figure 1 It is one of the schematic diagrams of the side orthographic structure of the safety belt cutting device in the middle;

[0056] Figure 3 It is Figure 2 It is a schematic diagram of the top orthographic structure of the safety belt cutting device in the middle;

[0057] Figure 4 It is Figure 3 It is a sectional view in the direction of A-A in the middle;

[0058] Figure 5 It is Figure 1 It is the second schematic diagram of the side orthographic structure of the safety belt cutting device in the middle;

[0059] Figure 6 for Figure 5 A schematic diagram of the top surface orthographic projection of the seatbelt cutting device.

[0060] Figure 7 for Figure 6 Cross-sectional view along the middle BB direction;

[0061] Figure 8 for Figure 4 Enlarged view of the central C area;

[0062] Figure 9 for Figure 7 A three-dimensional structural diagram of the corresponding position of the middle limit mechanism;

[0063] Figure 10 for Figure 4 Enlarged view of the central D area;

[0064] Figure 11 for Figure 7 Enlarged view of the central E region;

[0065] Figure 12 for Figure 1 A schematic diagram of one end face of the seat belt cutting device.

[0066] Explanation of reference numerals in the attached figures

[0067] 10 Seatbelt cutting device; 100 Housing; 110 Receiving groove; 111 Groove; 112 End wall; 120 Edge; 130 Slide groove; 140 Hollowed-out part; 150 Engaging head; 151 First inclined surface; 160 Movable opening; 170 Second mounting hole; 171 Third opening; 180 Blocking partition; 200 Cutting mechanism; 210 Cutter; 211 Blade; 220 Slider; 221 First connecting post; 222 First mounting hole; 223 Second 224 Opening; 230 Operating part; 240 First spring; 241 Engaging block; 250 Second inclined surface; 260 Second spring; 261 Second connecting post; 270 Third spring; 300 Limiting mechanism; 310 Movable limiting block; 311 First end; 312 Inclined part; 313 Stop surface; 314 Notch; 320 Fourth spring; 400 Lighting mechanism; 410 Lighting lamp; 420 Switch; 430 Charging port; 500 Window breaker cone. Detailed Implementation

[0068] The terms “first, second, third, etc.” or similar terms such as module A, module B, and module C used throughout this application are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that a specific order or sequence can be interchanged where permitted.

[0069] The term "comprising" as used in the full text of the present application is not to be interpreted in an excluding manner; it does not exclude further structural elements. It should therefore be interpreted as specifying the presence of the stated technical feature, integer or component as referred to in the description, but does not exclude the presence or addition of one or more other technical features, integers or components, and groups thereof.

[0070] It is understood that a person skilled in the art can combine the features mentioned in one or more of the embodiments mentioned throughout the present application in any suitable manner with the features of the other embodiments to implement the present application.

[0071] In the following, possible embodiments of the safety belt cutting device 10 according to the present application will be described by way of example with reference to the accompanying drawings.

[0072] With reference to Figures 1-12 The present application provides a safety belt cutting device 10, comprising a housing 100 and a cutter 210 mounted on the housing 100, wherein the housing 100 is provided with a receiving groove 110 for accommodating a safety belt. The cutter 210 is mounted on the housing 100 and is movable along the receiving groove 110 so as to cut the safety belt accommodated in the receiving groove 110. The safety belt cutting device 10 further comprises a limiting mechanism 300, wherein the limiting mechanism 300 comprises a movable limiting block 310 arranged on the housing 100 and movable between a limiting position and a releasing position, and the limiting mechanism 300 limits the movement of the safety belt out of the receiving groove 110 when the movable limiting block 310 is located at the limiting position.

[0073] According to the above, the cutter 210 cuts the safety belt in the receiving groove 110 by moving. When the movable limiting block 310 is at the limiting position, the limiting mechanism 300 limits the movement of the safety belt along the receiving groove 110 out of the receiving groove 110, so that the safety belt is always kept in the receiving groove 110 in the cutting state. Thus, it is not necessary to manually position the safety belt when in use, so as to reduce the operation difficulty when cutting the safety belt. At the same time, it is also possible to avoid the situation that the cutter 210 pushes the safety belt to move along the receiving groove 110 out of the safety belt cutting device 10 when cutting, so as to avoid affecting the cutting effect and improve the cutting efficiency.

[0074] In addition, when the safety belt is put into the receiving groove, the movable limiting block 310 can be moved to the releasing position, so that the safety belt can be easily put into the safety belt receiving groove, and the operation difficulty is reduced.

[0075] In the embodiment, the cutter 210 is a blade, the blade part of which is arranged obliquely to the length direction of the accommodating groove 110, the contact area with the safety belt is reduced during cutting, the resistance received by the blade is reduced, the cutting process is smoother, the cutting speed is faster, the cutting efficiency is improved, and the cutting quality is also good.

[0076] In some embodiments, the accommodating groove 110 has a first side wall 110a and a second side wall 110b arranged oppositely, and the movable limiting block 310 is arranged on the first side wall 110a, when the movable limiting block 310 is in the limiting position, the movable limiting block 310 is close to the second side wall 110b, and when the movable limiting block 310 is in the unlimiting position, the movable limiting block 310 is away from the second side wall 110b.

[0077] With the above structure, the movable limiting block 310 moves between the limiting position and the unlimiting position by being close to or away from the second side wall 110b. Since the movable limiting block 310 is arranged on the first side wall 110a, the size of the safety belt cutting device 10 in the direction perpendicular to the direction opposite to the first side wall 110a and the second side wall 110b can be reduced, which is beneficial to miniaturization.

[0078] Here, the side wall of the accommodating groove 110 refers to the vertical (or oblique) extending boundary wall surface on both sides of the groove along the length direction of the groove. These wall surfaces are usually connected with the edge of the opening (slot) of the groove, and can play a role of guiding, positioning or limiting the movement of an object.

[0079] As a specific way of arranging the movable limiting block on the first side wall 110a, the utility model is not particularly limited, for example, the movable limiting block can be integrally fixedly connected on the first side wall 110a, a part thereof is fixed relative to the first side wall 110a, and the other part is movable. Alternatively, the movable limiting block 310 is integrally movably arranged on the first side wall 110a.

[0080] In addition, the movable limiting block 310 can be at least partially arranged in a through hole or a blind hole of the side wall and can move in the through hole or the blind hole.

[0081] In some embodiments, the thickness of the safety belt is defined as a, and the distance between the movable limiting block 310 and the second side wall 110b when the movable limiting block 310 is in the limiting position is defined as b, and 0≤b

[0082] With the above structure, since b

[0083] As an example, when the movable limiting block 310 is in the limiting position, the movable limiting block 310 can abut against the second side wall 110b, i.e. b = 0. In other embodiments, b can also be greater than 0, as long as b < a. When the movable limiting block 310 is in the unlimiting position, b ≥ a.

[0084] In this way, by making the movable limiting block 310 abut against the side wall of the accommodating groove 110, the travel of the movable limiting block 310 can be limited by the accommodating groove 110. In this way, a stop structure for limiting the travel of the movable limiting block 310 does not need to be specially provided, and thus the structure of the limiting mechanism 300 can be simplified.

[0085] In some embodiments, the movable limiting block 310 is in sliding connection with the shell 100 and moves between the limiting position and the unlimiting position by sliding. In this way, by making the movable limiting block 310 in sliding connection with the shell 100, the movement of the movable limiting block 310 between the limiting position and the unlimiting position can be more stable.

[0086] Alternatively, the movable limiting block 310 can also be in rotational connection with the shell 100 and moves between the limiting position and the unlimiting position by rotating.

[0087] In some embodiments, the limiting mechanism 300 includes a force applying member for moving the movable limiting block 310 from the unlimiting position to the limiting position. In this way, by the force applying member applying force to the movable limiting block 310 to move to the limiting position, when the safety belt is cut, the movable limiting block 310 does not need to be manually driven to the limiting position, and the force applying member can ensure that the safety belt is limited when the movable limiting block 310 is in the limiting position, thereby reducing the operation difficulty of the safety belt cutting device 10.

[0088] In some embodiments, with reference to Figure 10 , the force applying member is a fourth spring 320. One end of the fourth spring 320 abuts against the shell 100, and the other end abuts against the movable limiting block 310. In this way, the fourth spring 320 can provide the force for driving the movable limiting block 310 to move to the limiting position, thereby simplifying the structure of the force applying member and reducing the operation difficulty of the safety belt cutting device 10.

[0089] The movable limiting block 310 has a stop portion for stopping and limiting the safety belt, and the movement track of the cutter 210 coincides with the stop portion.

[0090] With the above structure, not only can the safety belt be blocked from moving out of the accommodating groove, but also the cutting effect of the safety belt can be improved. Moreover, since the movement track of the cutter 210 coincides with the stop portion, the cutter 210 can completely pass over the safety belt located in the accommodating groove 110, ensuring that the safety belt is reliably cut and the cutting effect of the safety belt is improved.

[0091] In some embodiments, as shown in Figure 10 the stop portion is a side surface for stopping the safety belt, which is defined as a stop surface 313, and the moving track of the cutter 210 coincides with the stop surface 313. The safety belt abuts against the stop surface 313, and the safety belt is blocked from sliding out of the accommodating groove 110, thereby improving the cutting effect of the safety belt.

[0092] In other embodiments, as shown in Figure 9 the movable limiting block 310 is provided with a limiting portion for stopping the cutter 210, and the moving track of the cutter 210 at least partially coincides with the limiting portion.

[0093] As an example, the limiting portion can be a notch portion, which can be a blind hole or a blind groove structure.

[0094] In addition, as another example, the limiting portion is a side surface of the movable limiting block 310 for stopping the cutter (which can be understood as a side surface of the movable limiting block 310 from the Figure 9 、 Figure 10 stop surface 313 after the notch portion 314 is omitted from the structure of , which is not only used for stopping the safety belt, but also used for stopping the cutter, blocking the cutter 210 from sliding out of the accommodating groove 110, thereby avoiding danger to the user.

[0095] In some embodiments, as shown in Figure 9 the notch portion 314 is provided on the movable limiting block 310, and when the movable limiting block 310 is in the limiting position, the moving track of the cutter 210 at least partially coincides with the notch portion 314. The notch portion 314 is located at the first end portion 311 of the movable limiting block 310 away from the fourth spring 320. After the cutter 210 cuts the safety belt, the cutter 210 can slide into the notch portion 314, and the notch portion 314 provides a certain deceleration buffer space for the cutter 210. In this embodiment, the notch portion 314 is a through groove structure, and in other embodiments, the notch portion 314 can also be a blind hole or a blind groove structure, which is not limited to this example.

[0096] In some embodiments, the accommodating groove 110 is a slot, and the movable limiting block 310 is close to the slot opening 111 of the slot.

[0097] That is, one end of the length direction of the accommodating groove 110 extends to the edge portion 120 of the housing 100, and the edge portion 120 is open to form the slot opening 111 for the safety belt to enter. Thus, by forming the slot opening 111 of the accommodating groove 110 at the edge portion 120 of the housing 100, the safety belt can conveniently enter the accommodating groove 110 from the slot opening 111. Thus, the use of the safety belt cutting device 10 can be facilitated, and the operation difficulty of the safety belt cutting device 10 can be reduced.

[0098] In some embodiments, the notch 111 is outwardly flared. Thus, by setting the notch 111 to be outwardly flared, the seat belt can be easily and safely guided into the receiving groove 110 from the notch 111. Thus, the operation difficulty of the seat belt cutting device 10 can be reduced.

[0099] In some embodiments, the movable stopper 310 has a beveled portion 312 at one end thereof toward the second side wall 110b, the beveled portion 312 being gradually inclined toward the second side wall 110b from the notch 111 toward the bottom wall of the receiving groove 110. In some embodiments, as shown in Figure 10 the inclination of the side edge portion of the housing 100 near the notch 111 and the movable stopper 310 in the released stop position is defined as c, and the inclination of the beveled portion 312 is defined as d, d≤c.

[0100] In the present embodiment, as shown in Figure 10 the upper portion of the notch 111 has a circular arc shape, and the angle (i.e., the inclination) between the circular arc shape and the horizontal line (the length direction of the receiving groove 110) has multiple values, the smallest inclination being greater than or equal to the inclination of the beveled portion 312, so that the seat belt can be easily guided into the receiving groove 110.

[0101] Here, the inclination can be represented by the angle with respect to the length direction of the receiving groove 110, for example.

[0102] Referring to Figure 2 , in some embodiments, the cutter 210 is movable along the length direction of the receiving groove 110 from a first moving position to a second moving position to cut the seat belt. In a non-use state of the seat belt cutting device 10, as shown in Figure 4 , the cutter 210 is in the first moving position. After the seat belt cutting device 10 is used, as shown in Figure 7 , the cutter 210 is in the second moving position.

[0103] As shown in Figure 4 , when the cutter 210 is in the first moving position, the blade portion of the cutter 210 is farther away from the notch 111 with respect to the bottom wall of the receiving groove 110.

[0104] In addition, here, the bottom wall of the receiving groove 110 refers to the wall portion opposite to the notch 111, and in the example shown in Figure 10 , the end wall 112.

[0105] In this way, the cutter 210 can leave a space for acceleration between the cutter 210 and the safety belt in the accommodating groove 110, so that the cutter 210 can accelerate before contacting the safety belt in the accommodating groove 110 when moving from the first moving position to the second moving position, thereby enabling the cutter 210 to obtain greater speed and kinetic energy, and enabling the cutter 210 to cut the safety belt more quickly and smoothly. In this way, the cut of the safety belt can be smoother, thereby improving the cutting effect and cutting efficiency of the safety belt and inhibiting the occurrence of repeated cutting.

[0106] With reference to Figure 2 In some embodiments, the housing 100 is provided with a hollow portion 140, which at least partially overlaps the cutter 210 in the first moving position.

[0107] In this way, the state of the cutter 210 can be easily observed through the hollow portion 140 when the cutter 210 is in the first moving position, so as to confirm whether the cutter 210 has problems such as rusting, damage, etc. that can affect the cutting effect. In addition, by providing the hollow portion 140, impurities such as debris can enter the housing 100, and when the movement of the cutter 210 is affected, the impurities can be cleaned through the hollow portion 140 to ensure the normal operation of the safety belt cutting device 10, thereby improving the reliability and stability of the safety belt cutting device 10.

[0108] In some embodiments, with reference to Figure 2 , Figure 4 , Figure 5 etc., a blocking separation portion 180 is formed between the accommodating groove 110 and the hollow portion 140 to separate the accommodating groove 110 and the hollow portion 140.

[0109] As another embodiment, the blocking separation portion 180 can be omitted, and the accommodating groove 110 and the hollow portion 140 can be connected, i.e., they are formed by the same long hole.

[0110] In some embodiments, the safety belt cutting device 10 further comprises: a shooting structure provided on the housing 100 and connected with the cutter 210, for moving the cutter 210 along the accommodating groove 110.

[0111] With the above structure, the cutter 210 is moved by the shooting structure, thereby increasing the impact force and easily cutting the safety belt.

[0112] With reference to Figure 4 , Figure 7 , Figure 8In some embodiments, the ejection structure comprises: a sliding block 220 slidingly connected in the housing 100, the cutter 210 being fixed on the sliding block 220, the sliding block 220 being provided with a first mounting hole 222; a first spring 230, one end of the first spring 230 abutting against the sliding block 220 and the other end abutting against the housing 100, the first spring 230 driving the sliding block 220 to slide so as to drive the cutter 210 to move along the length direction of the accommodating groove 110 from the first moving position to the second moving position; a clamping block 240, the clamping block 240 being mounted in the first mounting hole 222 and moving along a direction perpendicular to the length direction of the accommodating groove 110 (i.e., the direction opposite to the first side wall 110a and the second side wall 110b); a clamping head 150, the clamping head 150 being provided on the housing 100; a second spring 250, one end of the second spring 250 abutting against the inner wall of the first mounting hole 222 and the other end abutting against the clamping block 240, the second spring 250 pushing the clamping block 240 to extend out of the first mounting hole 222 so as to make the clamping block 240 clamped on the clamping head 150 and keep the cutter 210 at the first moving position; a button 260, the button 260 being movably connected on the housing 100, when the button 260 is connected with the clamping block 240, the button 260 drives the clamping block 240 to retract into the first mounting hole 222 against the action force of the second spring 250 to release the clamping, a first inclined surface 151 being provided on the clamping head 150 and a second inclined surface 241 being provided on the clamping block 240, the first inclined surface 151 and the second inclined surface 241 being configured so that when the cutter 210 moves from the second moving position to the first moving position, the first inclined surface 151 and the second inclined surface 241 slide in contact to make the clamping block 240 retract into the first mounting hole 222.

[0113] As shown in FIGS. 1, 2 and 3, the third spring 270 is sleeved on the second connecting column 261 of the button 260, one end of the third spring 270 abutting against the housing 100 and the other end abutting against the button 260, the third spring 270 being capable of pushing the button 260 to move towards the outside of the housing 100. Figure 4 Figure 8 As shown in FIGS. 1, 2 and 3, the third spring 270 is sleeved on the second connecting column 261 of the button 260, one end of the third spring 270 abutting against the housing 100 and the other end abutting against the button 260, the third spring 270 being capable of pushing the button 260 to move towards the outside of the housing 100.

[0114] In the non-use state of the safety belt cutting device 10, the button 260 is in the original position, the third spring 270 abutting against the button 260 is in the expanded state, the clamping block 240 extends out of the first mounting hole 222, the lower surface of the clamping block 240 abutting against the upper surface of the second connecting column 261, and the side surface of the clamping block 240 abutting against the clamping head 150, thereby avoiding the sliding block 220 being pushed out by the elastic force of the first spring 230, and fixing the cutter 210 connected with the sliding block 220 at the first moving position.

[0115] ​After the user presses the button 260, the third spring 270 is compressed by force, the second connecting column 261 moves, the clamping block 240 abutting with the second connecting column 261 completely enters the first mounting hole 222, the second spring 250 is in a compressed state, at this time, the clamping block 240 no longer abuts with the clamping head 150, the slider 220 is out of the constraint of the clamping block 240, and at the same time, is quickly moved under the action of the elastic force of the first spring 230, so as to shoot the cutter 210 connected with the slider 220 from the first moving position to the second moving position. The cutter 210 is quickly moved in the containing groove 110, and the safety belt is cut. The third spring 270 is naturally expanded, and the button 260 is reset.

[0116] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , the shell 100 is provided with a movable port 160, and the extension direction of the movable port 160 is parallel to the extension direction of the containing groove 110. The slider 220 is further provided with an operation part 224, and the operation part 224 is slidingly connected to the movable port 160.

[0117] After the cutting is completed, the user drags the operation part 224, drives the slider 220 connected with the operation part 224 and the cutter 210 connected with the slider 220 to move to the first moving position. In this process, the first spring 230 is compressed by force. When the slider 220 approaches the first moving position, the second inclined surface 241 on the clamping block 240 slidingly contacts the first inclined surface 151 on the clamping head 150. Since the first inclined surface 151 and the second inclined surface 241 are both inclined to the direction from the second moving position to the first moving position, and gradually incline to the direction close to the first mounting hole 222, when the second inclined surface 241 slidingly contacts the first inclined surface 151, the clamping head 150 can force the clamping block 240 to move into the first mounting hole 222, at this time, the second spring 250 is compressed. When the slider 220 moves to the first moving position, as shown in Figure 8 , the first inclined surface 151 and the second inclined surface 241 are not in contact, the clamping block 240 is moved under the action of the elastic force of the second spring 250, and abuts with the second connecting column 261, thus, the clamping block 240 is completely reset.

[0118] By adopting the above structure, the shooting structure can be stably actuated by the slider 220 and the like, in addition, the shooting structure can be stably kept in the initial position by the clamping block 240 and the like, and in combination with the button 260 and the like, the shooting structure can be released at a suitable time, so that the safety belt is well cut.

[0119] In some embodiments, the housing 100 includes a first part and a second part, one end of which is hinged. The first part and the second part are rotated so that their opposite edges come into contact, forming a receiving groove 110 at the contact position. Thus, the seat belt can be moved into and out of the receiving groove 110 by rotating the first part and the second part.

[0120] In some embodiments, the seatbelt cutting device 10 further includes an illumination lamp 410 disposed on the housing 100. Thus, by emitting a light beam outward from the illumination lamp 410, the seatbelt cutting device 10 can be illuminated, thereby increasing the usability of the seatbelt cutting device 10.

[0121] In some embodiments, the seatbelt cutting device 10 further includes a switch 420, which is disposed on the housing 100 and electrically connected to the lighting lamp 410, controlling the lighting lamp 410 to be constantly on or flashing. Thus, by controlling the lighting lamp 410 to be constantly on via the switch 420, the seatbelt cutting device 10 can be used for illumination. By controlling the lighting lamp 410 to flash via the switch 420, a warning signal can be emitted through flashing when needed. This increases the applicability of the seatbelt cutting device 10.

[0122] In some embodiments, the seatbelt cutting device 10 further includes a window breaker cone 500 disposed on the housing 100. Thus, by providing the window breaker cone 500 on the housing 100, the window can be broken using the window breaker cone 500 in emergency situations such as when the door cannot be opened. This increases the applicability of the seatbelt cutting device 10.

[0123] The above description provides an exemplary description of possible embodiments of the seatbelt cutting device 10. Below, with reference to the accompanying drawings, a detailed description of the specific structure of the seatbelt cutting device 10 in a particular embodiment will be provided.

[0124] Figure 1 A three-dimensional structural diagram of the seatbelt cutting device 10; Figure 2 for Figure 1 One of the side projection schematic diagrams of the seat belt cutting device 10; Figure 3 for Figure 2 A schematic diagram of the top surface orthographic projection of the seatbelt cutting device 10; Figure 4 for Figure 3 Cross-sectional view along the AA direction; Figure 5 for Figure 1 Second side projection schematic diagram of the seat belt cutting device 10; Figure 6 for Figure 5 A schematic diagram of the top surface orthographic projection of the seatbelt cutting device 10; Figure 7 for Figure 6A schematic view of the section in the B-B direction.

[0125] As shown in Figures 1-7 , the safety belt cutting device 10 comprises a housing 100, and a cutting mechanism 200, a limiting mechanism 300, an illuminating mechanism 400 and a window breaking cone 500 arranged on the housing 100. The cutting mechanism 200 is used for cutting the safety belt, the limiting mechanism 300 is used for limiting the safety belt when the cutting mechanism 200 cuts the safety belt, the illuminating mechanism 400 is used for illumination, and the window breaking cone 500 is used for breaking the window.

[0126] As shown in Figures 2-7 , the housing 100 is a cuboid-shaped shell member formed by butting two half shells, and is provided with an elongated accommodating groove 110 penetrating the two half shells. The accommodating groove 110 extends from the middle of the housing 100 to the edge 120 at one end of the housing 100 along the length direction of the housing 100, that is, one end of the accommodating groove 110 is open at the edge 120 to form a slot opening 111 for the safety belt to enter, and the slot opening 111 is in the shape of an expanding flange to facilitate the entry of the safety belt. The width of the accommodating groove 110 is adapted to the thickness of the safety belt, and specifically, can be slightly larger than the thickness of the safety belt. In this way, the safety belt can be conveniently and smoothly guided into the accommodating groove 110, and at the same time, the safety belt can be limited in the thickness direction by the accommodating groove 110, so that the safety belt can be kept flat when the cutter 210 cuts the safety belt, thereby making the cut flat and improving the cutting effect.

[0127] As shown in Figure 4 , Figure 7 , the cutting mechanism 200 comprises a cutter 210 and an ejection structure for driving the cutter 210 to move along the accommodating groove 110. The housing 100 is provided with a rectangular sliding groove 130, and the extending direction of the sliding groove 130 is consistent with the extending direction of the accommodating groove 110. A sliding block 220 is arranged in the sliding groove 130 and is in sliding connection with the sliding groove 130, so as to slide along the sliding groove 130. In addition, the sliding stroke of the sliding block 220 can be limited by abutting the sliding block 220 with the housing 100. The cutter 210 is fixedly installed on the sliding block 220, and the following blade part 211 of the cutter 210 overlaps the accommodating groove 110 in the side direction. The cutter 210 is provided with the blade part 211 at the side edge of the side of the slot opening 111 of the accommodating groove 110, so that when the cutter 210 moves linearly by sliding the sliding block 220, the blade part 211 of the cutter 210 can slide from the other end of the accommodating groove 110 to the slot opening 111 at one end, so as to cut the safety belt in the accommodating groove 110. The extending direction of the blade part 211 (i.e. the extending direction of the blade line) is inclined to the extending direction of the accommodating groove 110, so as to improve the cutting effect when cutting the safety belt.

[0128] The ejection structure includes a sliding block 220, a first spring 230, an engaging block 240, a second spring 250, a button 260, and a third spring 270. Figure 4 、 Figure 7 As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230.

[0129] As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230. Figure 4 As shown in FIG. 2, when the sliding block 220 is at the end away from the slot opening 111 of the accommodating groove 110, the cutter 210 is at the first moving position, and a gap is left between the blade 211 of the cutter 210 and the end wall 112 at the other end of the accommodating groove 110. Thus, the cutter 210 can completely exit the accommodating groove 110 when it is at the first moving position, so as to avoid damaging the safety belt in the accommodating groove 110 when the safety belt is not needed to be cut. In addition, when the cutter 210 is at the first moving position, the gap left between the blade 211 of the cutter 210 and the end wall 112 at the other end of the accommodating groove 110 can also increase the acceleration distance of the sliding block 220 before the cutter 210 cuts the safety belt when the sliding block 220 drives the cutter 210 to cut the safety belt under the pushing of the first spring 230, so that the cutter 210 can obtain a faster speed and higher kinetic energy when cutting the safety belt, thereby improving the cutting speed and cutting effect.

[0130] Figure 8 As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230. Figure 4 As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230. Figure 4 、 Figure 7 、 Figure 8 As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230.

[0131] As shown in FIG. 2, the sliding block 220 is provided with a first connecting column 221 at an end away from the slot opening 111 of the accommodating groove 110, and the first spring 230 is sleeved on the first connecting column 221. One end of the first spring 230 abuts against the sliding block 220, and the other end abuts against the shell 100. Thus, the sliding block 220 can be driven to slide in the sliding groove 130 toward the end close to the slot opening 111 by the elastic force of the first spring 230. Figure 8As shown, a locking head 150 is also provided inside the housing 100. When the cutter 210 is in the first moving position, the locking head 150 is located on the side of the locking block 240 extending from the first mounting hole 222 toward the slot 111 of the receiving groove 110. The locking head 150 abuts against the locking block 240 extending from the first mounting hole 222, preventing the slider 220 from sliding along the slide groove 130 toward the slot 111 of the receiving groove 110 under the push of the first spring 230, so that the cutter 210 remains fixed in the first moving position.

[0132] like Figure 8 As shown, when the cutter 210 is in the first moving position, the surface of the engaging head 150 facing the engaging block 240 is vertical, which improves the stability when the engaging head 150 and the engaging block 240 are engaged. The surface of the engaging head 150 facing away from the engaging block 240 (facing the slot 111 of the receiving groove 110) is provided with a first inclined surface 151. This allows the engaging block 240 to be guided towards the inside of the first mounting hole 222 when the cutting machine 210 is driven to slide towards the first moving position by the slider 220. This allows the engaging block 240 to retract into the first mounting hole 222, thereby passing over the engaging head 150 and enabling the cutting machine 210 to reach the first moving position.

[0133] like Figure 8 As shown, the engaging block 240 extends from the first mounting hole 222 and has a second inclined surface 241 on the side of the slot 111 away from the receiving groove 110. The second inclined surface 241 is adapted to the first inclined surface 151. Therefore, when the engaging block 240 slides towards the first moving position with the slider 220 driving the cutter 210, the second inclined surface 241 can be brought into contact with the first inclined surface 241, making the sliding between the first inclined surface 151 and the second inclined surface 241 smoother. Thus, when the engaging block 240 slides towards the first moving position with the slider 220 driving the cutter 210, the engaging block 240 can more smoothly pass over the engaging head 150, allowing the cutter 210 to reach the first moving position more smoothly.

[0134] like Figure 4 , Figure 7 , Figure 8As shown, the button 260 is movably connected to the housing 100 at a position corresponding to the engaging block 240 when the cutter 210 is in the first moving position. One end face of the button 260 is exposed by the surface of the housing 100, and the other end extends into the housing 100 and abuts against the end face of the extending end of the engaging block 240 from the first mounting hole 222. Thus, the engaging block 240 can be driven to retract into the first mounting hole 222 by pressing the button 260, and is released from the limiting of the clamping head 150, so that the slider 220 and the cutter 210 can slide under the pushing of the first spring 230.

[0135] As shown, the button 260 is movably connected to the housing 100 at a position corresponding to the engaging block 240 when the cutter 210 is in the first moving position. One end face of the button 260 is exposed by the surface of the housing 100, and the other end extends into the housing 100 and abuts against the end face of the extending end of the engaging block 240 from the first mounting hole 222. Thus, the engaging block 240 can be driven to retract into the first mounting hole 222 by pressing the button 260, and is released from the limiting of the clamping head 150, so that the slider 220 and the cutter 210 can slide under the pushing of the first spring 230. Figure 8 As shown, the button 260 is movably connected to the housing 100 at a position corresponding to the engaging block 240 when the cutter 210 is in the first moving position. One end face of the button 260 is exposed by the surface of the housing 100, and the other end extends into the housing 100 and abuts against the end face of the extending end of the engaging block 240 from the first mounting hole 222. Thus, the engaging block 240 can be driven to retract into the first mounting hole 222 by pressing the button 260, and is released from the limiting of the clamping head 150, so that the slider 220 and the cutter 210 can slide under the pushing of the first spring 230.

[0136] Figure 7 As shown, the slider 220 can reach a position corresponding to the slot opening 111 of the accommodating groove 110 in the sliding groove 130 under the pushing of the first spring 230, so that the cutter 210 is in the second moving position. When the cutter 210 is in the second moving position, the cutter 210 is located close to the slot opening 111 of the accommodating groove 110.

[0137] As shown, the slider 220 can reach a position corresponding to the slot opening 111 of the accommodating groove 110 in the sliding groove 130 under the pushing of the first spring 230, so that the cutter 210 is in the second moving position. When the cutter 210 is in the second moving position, the cutter 210 is located close to the slot opening 111 of the accommodating groove 110. Figure 1 Figure 2 Figure 3 Figure 5 Figure 6 As shown, the slider 220 is further provided with operation portions 224, and the operation portions 224 are provided with two, respectively located at the positions corresponding to the two sides of the slider 220 in the through direction of the accommodating groove 110. The housing 100 is provided with movable openings 160 at the positions corresponding to the operation portions 224, and the extension direction of the movable openings 160 is parallel to the extension direction of the accommodating groove 110. The operation portions 224 extend to the outside of the housing 100 through the movable openings 160, so as to facilitate the user to control the slider 220 through the operation portions 224. Specifically, when the cutter 210 is in the second moving position, the user can control the slider 220 to slide along the sliding groove 130 through the operation portions 224, so as to drive the cutter 210 to slide from the second moving position to the first moving position.

[0138] As shown, the slider 220 can reach a position corresponding to the slot opening 111 of the accommodating groove 110 in the sliding groove 130 under the pushing of the first spring 230, so that the cutter 210 is in the second moving position. When the cutter 210 is in the second moving position, the cutter 210 is located close to the slot opening 111 of the accommodating groove 110. Figure 2 Figure 4 Figure 5 Figure 7 ​​​​​​​​As shown, the housing 100 is further provided with an elongated hollow part 140, which penetrates the housing 100 and is located on the extension line of the accommodating groove 110 and is arranged in a spaced manner with the accommodating groove 110. Specifically, the accommodating groove 110 and the hollow part 140 form a blocking separation part 180, which separates the accommodating groove 110 and the hollow part 140 extending on the same straight line. When the cutter 210 is in the first moving position, the cutter 210 coincides with the hollow part 140 in the penetrating direction of the hollow part 140. Thus, the state of the cutter 210 can be conveniently observed when the cutter 210 is in the first moving position, so as to confirm whether the cutter 210 has problems such as rusting, damage and the like which may affect the cutting effect. In addition, by arranging the hollow part 140, impurities such as debris can enter the housing 100, and when the sliding of the cutter 210 is affected, the impurities can be cleaned through the hollow part 140 to ensure the normal operation of the safety belt cutting device 10, thereby improving the reliability and stability of the safety belt cutting device 10.

[0139] Figure 9 For Figure 7 A schematic view of the three-dimensional structure of the position corresponding to the limiting mechanism 300 in the middle; Figure 10 For Figure 4 A local enlarged view of the D part in the middle; Figure 11 For Figure 7 A local enlarged view of the E part in the middle.

[0140] As Figures 9-11 shown, the limiting mechanism 300 includes a movable limiting block 310 and a fourth spring 320 (a force applying member). The movable limiting block 310 is arranged in the housing 100 and located near the slot opening 111 of the accommodating groove 110. Specifically, the housing 100 is provided with a blind hole-shaped second mounting hole 170, which is located near the slot opening 111 of the accommodating groove 110, extends along the width direction (up and down direction in the figure) of the accommodating groove 110, and forms a third opening 171 on the side wall of the accommodating groove 110. The movable limiting block 310 is installed in the second mounting hole 170 and can move in the second mounting hole 170 along the width direction of the accommodating groove 110.

[0141] The movable limiting block 310 has a first end portion 311 (the opposite end is a second end portion) at one end (the lower end in the drawing) corresponding to the third opening 171. The movable limiting block 310 moves in the second mounting hole 170, and the first end portion 311 can be extended out of or retracted into the third opening 171. When the first end portion 311 is extended out of the third opening 171, the first end portion 311 can abut against the side wall (the lower side wall in the drawing) on the other side of the accommodation groove 110. Thus, the movable limiting block 310 reaches the limiting position, and the accommodation groove 110 is closed at the position close to the slot 111, preventing the safety belt from moving out of the accommodation groove 110, thereby limiting the safety belt. When the first end portion 311 is retracted into the second mounting hole 170 from the third opening 171, the accommodation groove 110 can be opened. Thus, the movable limiting block 310 reaches the unlimiting position, and the safety belt can move into or out of the accommodation groove 110 through the slot 111.

[0142] In the present embodiment, the movable limiting block 310 is arranged slightly inward of the slot 111 in the length direction of the accommodation groove 110, but the present application is not limited thereto. For example, the movable limiting block 310 can be arranged substantially overlapping the slot 111, and the slot 111 can be directly opened and closed to limit and unlimit the safety belt.

[0143] As shown in Figure 10 , Figure 11 , the fourth spring 320 is mounted in the second mounting hole 170, one end of the fourth spring 320 abuts against the bottom of the second mounting hole 170, and the other end abuts against the movable limiting block 310. Thus, the first end portion 311 of the movable limiting block 310 can be driven to extend out of the third opening 171 by the fourth spring 320, that is, the fourth spring 320 applies a force to the movable limiting block 310 to the limiting position.

[0144] As shown in Figure 10 , Figure 11 , the first end portion 311 has a beveled portion 312, the beveled portion 312 is arranged facing the slot 111, and the extension direction of the beveled portion 312 is obliquely arranged in the length direction of the accommodation groove 110 (that is, the beveled portion 312 faces the lower left in the drawing). Thus, when the safety belt enters the accommodation groove 110 through the slot 111, the force can be partially decomposed by the beveled portion 312 to the direction of driving the movable limiting block 310 to move from the limiting position to the unlimiting position by abutting against the beveled portion 312, so that the safety belt can enter the accommodation groove 110 through the slot 111 after the first end portion 311 is retracted into the second mounting hole 170.

[0145] As shown in Figure 10As shown, the movable limiting block 310 has a stop surface 313 for stopping and limiting the seat belt. Specifically, the stop surface 313 is disposed on the side of the first end 311 facing away from the slot 111 and towards the first moving position side of the cutter 210. The stop surface 313 is generally planar, and its extending direction is, for example, perpendicular to the length and width directions of the receiving groove 110. When the movable limiting block 310 is in the limiting position, at least a portion of the stop surface 313 is located in the receiving groove 110, and the distance between the stop surface 313 and the end wall 112 (bottom wall) of the other end of the receiving groove 110 is adapted to the width of the seat belt to effectively limit the seat belt. When the movable limiting block 310 is in the released limiting position, the stop surface 313 moves away from the receiving groove 110.

[0146] Thus, with this structure, after the seat belt enters the receiving groove 110, the stop surface 313 and the end wall 112 of the receiving groove 110 can limit the seat belt, so that the position of the seat belt in the receiving groove 110 is kept roughly fixed, so that the cutter 210 can slide from the first moving position to the second moving position to cut the seat belt.

[0147] In this embodiment, the end wall 112 (bottom wall of the receiving groove) is the wall portion of the blocking partition 180 facing the receiving groove 110. Alternatively, from the perspective of the receiving groove 110 having an open groove shape with a groove opening 111, it can also be referred to as the bottom wall of the groove.

[0148] like Figures 9-11 As shown, a notch 314, which is shaped like a notch when viewed along the length of the receiving groove 110, is provided on the first end 311 of the movable limiting block 310. The notch 314 is located at the corresponding position of the cutter 210, penetrating the stop surface 313 and the inclined surface 312. From the side, it can be seen that the stop surface 313 and the moving trajectory of the cutter 210 partially coincide. Therefore, when the movable limiting block 310 is in the limiting position, the cutter 210 can slide into the notch 314 and reach the second moving position. Thus, when the cutter 210 reaches the second moving position, the blade 211 can pass over the stop surface 313, thereby ensuring that the cutter 210 completely cuts the seat belt, thereby improving the cutting effect of the seat belt. In addition, the notch 314 can also guide and limit the movement of the cutter 210, making its movement stable.

[0149] Figure 12 for Figure 1 A schematic diagram of one end face of the seatbelt cutting device 10. (See diagram below.) Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 12As shown, the lighting mechanism 400 includes a lighting lamp 410, a switch 420, a charging port 430 and a battery (not shown). The lighting lamp 410 is mounted on the end surface of the housing 100 away from the one end of the slot 111. The battery is mounted inside the housing 100 for supplying power to the lighting lamp 410. The charging port 430 is mounted on the housing 100 on the side of the housing 100 where the button 260 is mounted, for charging the battery. The switch 420 is mounted on the housing 100 on the side of the housing 100 where the button 260 is mounted, adjacent to the charging port 430. The switch 420 has three positions, one for turning off the lighting lamp 410, one for turning on the lighting lamp 410, and one for flashing the lighting lamp 410. By turning on the lighting lamp 410 through the switch 420, the seat belt cutter 10 can be used for lighting. By flashing the lighting lamp 410 through the switch 420, a warning signal can be sent out by flashing when needed. Thus, the use range of the seat belt cutter 10 can be increased.

[0150] As shown in Figures 1-7 , Figure 12 , the window breaking cone 500 is mounted on the housing 100 and exposed from the end surface of the housing 100 away from the one end of the slot 111. The window breaking cone 500 is used for breaking the window glass, so that in the case of emergency when the door cannot be opened, the window can be broken through the window breaking cone 500. Thus, the use range of the seat belt cutter 10 can be increased.

[0151] With the above structure, when it is needed to use the seat belt cutter 10 to cut the seat belt, referring to Figure 1 , Figure 2 , Figure 4 , Figure 9 , Figure 10 , first, the seat belt is sent into the receiving groove 110 from the slot 111 of the receiving groove 110, at this time, the seat belt contacts the inclined surface part 312 of the movable limiting block 310, and through the inclined surface part 312, a component force of the movable limiting block 310 is generated towards the upper side of the receiving groove 110, so as to lift up the movable limiting block 310 and move it to the position where the limiting is released. In this way, the seat belt can be further moved into the receiving groove 110 along the length direction of the receiving groove 110. Figure 9

[0152] When the seat belt is moved to the position where it completely passes over the movable limiting block 310, the movable limiting block 310 is moved (returns) to the limiting position under the action of the fourth spring 320, so that the position of the seat belt is limited by the movable limiting block 310 and the bottom wall (i.e. the end wall 112) of the receiving groove 110, and kept in the state where the active range is limited to the specified range.

[0153] In this state, referring to Figure 1 , Figure 4 ,​Figure 7 、 Figure 8 , the operator can press the button 260 to move the engaging block 240 upward against the force of the second spring 250, thereby releasing the engagement with the engaging head 150. At this time, the slider 220 is ejected by the first spring 230, and the cutter 210 is moved from the first moving position shown in Fig. 2A along the length direction of the accommodation groove 110 toward the second moving position shown in Fig. 2B, in the process of which the cutter 210 contacts and cuts the safety belt to achieve cutting off the safety belt. Figure 8 Figure 4 Figure 7

[0154] Thus, in the embodiment, when the safety belt is made to enter the accommodation groove 110, the movable limiting block 310 can be moved to the position where the limiting is released, so as to avoid hindering the movement of the safety belt, thereby making the safety belt easily enter the accommodation groove 110 and reducing the operation difficulty.

[0155] In addition, when the safety belt in the accommodation groove 110 is cut by the cutter 210, the movable limiting block 310 can be in the limiting position, so as to limit the safety belt by the limiting mechanism. Thus, the operation difficulty can be reduced when the safety belt is cut. Meanwhile, the safety belt is limited by the movable limiting block 310 in the limiting position when cutting, so as to block the safety belt from moving out of the accommodation groove 110, and the safety belt can be limited in the accommodation groove 110, so as to make the cutting easily and avoid affecting the cutting effect, thereby improving the cutting efficiency.

[0156] In summary, since the movable limiting block 310 is provided, the safety belt can be easily made to enter the safety belt accommodation groove 110 by moving the movable limiting block 310 to the position where the limiting is released, so as to reduce the operation difficulty and improve the operation efficiency, and the safety belt can be cut well by moving the movable limiting block 310 to the limiting position.

[0157] As another embodiment, the movable limiting block 310 can be configured to be manually moved. Thus, by moving the movable limiting block 310 to the position where the limiting is released, the available length of the accommodation groove 110 can be increased, so as to avoid hindering the movement of the safety belt by the movable limiting block 310, thereby making the safety belt easily enter the safety belt accommodation groove 110. Then, the position of the safety belt in the length direction of the accommodation groove 110 can be adjusted appropriately, so as to make the movable limiting block 310 move to the limiting position.

[0158] In addition, as a variant, even if the accommodation groove 110 does not have the notch 111, the movable limiting block 310 can be configured to be moved by the safety belt, in which case the direction of the inclined surface of the first end portion of the movable limiting block 310 can be set appropriately.

[0159] ​​​It should be noted that the above merely describes the preferred embodiments of the present application and the technical principles applied. It should be understood by those skilled in the art that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the technical concept of the present application, and all fall within the protection scope of the present application.

[0160] For example, in the above description, the movable stopper block moves along the width direction of the accommodating groove (long hole), however, as another embodiment, the movable stopper block can be configured to move along a direction perpendicular to the width direction and the length direction of the accommodating groove (long hole).

[0161] In addition, in some embodiments, the movable stopper block is configured to be moved from the stop position to the stop release position by the safety belt, however, the present application is not limited thereto, and an operation member can be provided for the movable stopper block, and the operator operates the operation member to move the movable stopper block from the stop position to the stop release position.

Claims

1. A seatbelt cutting device, characterized in that, include: A housing having a receiving slot for accommodating a seat belt; A cutter, which is mounted on the housing and is movable along the receiving groove, thereby cutting the seat belt received in the receiving groove; as well as A limiting mechanism includes a movable limiting block disposed on the housing. The movable limiting block moves between a limiting position and a releasing limiting position. When the movable limiting block is in the limiting position, the limiting mechanism restricts the seat belt from moving outside the receiving groove.

2. The seatbelt cutting device according to claim 1, characterized in that, The receiving groove has a first sidewall and a second sidewall that are disposed opposite to each other. The movable limiting block is disposed on the first side wall. When the movable limiting block is in the limiting position, the movable limiting block is close to the second side wall. When the movable limiting block is in the released limiting position, the movable limiting block is away from the second side wall.

3. The seatbelt cutting device according to claim 2, characterized in that, The thickness of the seat belt is defined as 'a'. When the device is in the limited position, the distance between the movable limiting block and the second sidewall is defined as b. At the specified limit position, 0 ≤ b < a.

4. The seatbelt cutting device according to claim 1, characterized in that, The movable limiting block is slidably connected to the housing.

5. The seatbelt cutting device according to claim 1, characterized in that, The limiting mechanism further includes: A force-applying component that causes the movable limiting block to move from the released limiting position to the limiting position.

6. The seatbelt cutting device according to claim 1, characterized in that, The movable limiting block has a stop portion for stopping and limiting the seat belt, and the movement trajectory of the cutter at least partially coincides with the stop portion.

7. The seatbelt cutting device according to claim 1, characterized in that, The movable limiting block is provided with a limiting part to stop and limit the cutter, and the moving trajectory of the cutter at least partially coincides with the limiting part.

8. The seatbelt cutting device according to claim 1, characterized in that, The receiving groove is slotted, and the movable limiting block is close to the opening of the slot.

9. The seatbelt cutting device according to claim 8, characterized in that, The slot is flared outwards.

10. The seatbelt cutting device according to claim 8, characterized in that, The receiving groove has a first sidewall and a second sidewall disposed opposite to each other, and the movable limiting block is disposed on the first sidewall. The movable limiting block has a beveled portion at one end facing the second sidewall, and the beveled portion gradually slopes from the slot towards the bottom wall of the receiving slot towards the second sidewall.

11. The seatbelt cutting device according to claim 10, characterized in that, When the limiting position is released, the inclination of the edge of the housing near the slot and the movable limiting block is defined as c. The inclination of the inclined surface is defined as d, where d ≤ c.

12. The seatbelt cutting device according to claim 8, characterized in that, The cutter can move from a first moving position to a second moving position along the length of the receiving groove, thereby cutting the seat belt. When the cutter is in the first moving position, the cutting edge of the cutter is further away from the opening of the groove relative to the bottom wall of the receiving groove.

13. The seatbelt cutting device according to any one of claims 1-12, characterized in that, The cutter can move from a first moving position to a second moving position along the length of the receiving groove. The housing has a cutout portion that at least partially overlaps with the cutter located at the first moving position.

14. The seatbelt cutting device according to any one of claims 1-12, characterized in that, Also includes: A catapult structure is disposed on the housing and connected to the cutter for moving the cutter along the receiving groove.

15. The seatbelt cutting device according to claim 14, characterized in that, The ejection structure includes: A slider is slidably connected in the housing, the cutter is fixed on the slider, and the slider is provided with a first mounting hole; A first spring, one end of which abuts against the slider and the other end against the housing, drives the slider to slide, thereby moving the cutter from a first moving position to a second moving position along the length of the receiving groove; A locking block, which is installed in the first mounting hole and moves along the length direction perpendicular to the receiving groove; A locking head, wherein the locking head is disposed in the housing; The second spring has one end abutting against the inner wall of the first mounting hole and the other end abutting against the locking block, pushing the locking block out of the first mounting hole so that the locking block engages with the locking head, thereby holding the cutter in the first moving position; A button, movably connected to the housing, when engaged with the locking block, drives the locking block to retract into the first mounting hole against the force of the second spring to release the engagement. The engaging head has a first inclined surface, and the engaging block has a second inclined surface. The first inclined surface and the second inclined surface are configured such that when the cutter moves from the second moving position to the first moving position, the first inclined surface and the second inclined surface slide into contact, causing the engaging block to retract into the first mounting hole.

16. The seatbelt cutting device according to any one of claims 1-12, characterized in that, Also includes: A lighting fixture, which is mounted on the housing.

17. The seatbelt cutting device according to any one of claims 1-12, characterized in that, Also includes: A window-breaking cone, which is disposed on the housing.

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