Lock and vehicle body

Abstract

A lock and a vehicle body belong to the technical field of vehicles. The lock comprises a lock body, a lock cover and a lock head. The lock head can push the spring bolt to move in the moving direction close to the pin under the action of external force, so that when the pin slides to the first clamping position along the slide way of the spring bolt to be clamped, the lock head is clamped with the spring bolt. The lock is installed in a vehicle body, the lock head is arranged on the door plate, the lock cover and the lock body are arranged on the box body, when locking is needed, the door plate can be pushed to enable the lock head to push the spring bolt to move in the moving direction till the pin is clamped into the first clamping position, the spring bolt and the lock head are connected in a clamped mode, and locking is achieved. By directly utilizing the matching of the pin and the slide way, the pin is not easy to pop out from the first clamping position in the slide way and can be stably clamped with the first clamping position when the door plate is pulled during forced unlocking, so that the spring bolt is always fixedly connected with the lock head, and the locking force is larger.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and more particularly, to a lock and a vehicle body. Background Art

[0002] Currently, the overhead boxes on the market all use latch-blocking door handle locks, which are mainly divided into two categories: single-latch type and double-latch type. The single-latch type and double-latch type require the formation of a handle socket structure on the door panel, which will affect the overall aesthetic appearance.

[0003] With the development of new energy technology, people are paying more and more attention to the sense of technology and beauty, and tend to apply hidden PUSH lock mechanisms. However, the current hidden PUSH lock mechanisms have relatively small locking forces and can generally only withstand a forced opening force of 10-20 N. Since the overhead boxes of commercial vehicles generally allow a load of 10 KG, in order to ensure the use safety, the forced opening force of the door panel needs to be ≥ 100 N, so it cannot be directly used, and a hidden PUSH lock mechanism with a larger locking force needs to be provided. Summary of the Utility Model

[0004] Based on the above deficiencies, this application provides a lock and a vehicle body to partially or completely improve the problem of relatively small locking force in related technologies.

[0005] This application is implemented as follows:

[0006] In a first aspect, an example of this application provides a lock, which includes a lock body, a lock cover, and a lock head. The lock body has an accommodation cavity, and a movable latch is arranged in the accommodation cavity. The latch has a slideway, and a first clamping position is arranged inside the slideway; the lock cover covers the lock body, and a pin protrudes from the side of the lock cover facing the latch; the lock head is detachably connected to the latch; the lock head can push the latch to move along the moving direction close to the pin under the action of an external force, so that when the pin slides along the slideway to the first clamping position and is clamped, the lock head is clamped with the latch.

[0007] In the above implementation process, when it is necessary to lock the door, a thrust can be applied to the lock head, and the lock head is used to push the latch to move along the moving direction close to the pin, so that the pin can slide in the slideway of the latch. When the pin slides to the first clamping position of the slideway, the pin can be clamped at the first clamping position. At this time, the latch can be clamped with the lock head. When the pin is clamped at the first clamping position, the thrust applied to the lock head is removed. Due to the clamping effect of the pin and the first clamping position, the latch cannot continue to move along the moving direction. Therefore, the latch and the lock head can be always firmly connected. In the lock provided by the example of this application, the pin is arranged on the lock cover, and the position between the lock cover and the lock body is relatively fixed. Directly using the cooperation of the pin and the slideway, when the lock head is forcibly pulled, the pin is not easy to pop out from the first clamping position in the slideway and can be stably clamped with the first clamping position, so that the latch always firmly locks the lock head and the locking force is relatively large.

[0008] In combination with the first aspect, in an alternative embodiment, a first return spring is further disposed in the accommodation cavity. The two ends of the first return spring along the moving direction are respectively connected to the locking tongue and the inner wall of the lock body. When the lock head pushes the locking tongue to move along the moving direction, the first return spring contracts. After the pin exits the first latching position and the external force disappears, the first return spring can rebound, causing the locking tongue and the lock head to move away from the pin, and the locking tongue is separated from the lock head.

[0009] In the above implementation process, when unlocking is required, a thrust can be continuously applied to the lock head to push the locking tongue along the moving direction, so that the pin can slide out of the first latching position, and the latching effect between the pin and the locking tongue slideway disappears. After the thrust applied to the lock head is removed, the first return spring will rebound from the compressed state to the stretched state. During the rebound process, a force will be applied to the locking tongue and the lock head, pushing the locking tongue and the lock head back to the initial state away from the pin. At the same time, the pin exits from the slideway, and the fastening effect between the locking tongue and the lock head disappears, realizing unlocking.

[0010] In combination with the first aspect, in an alternative embodiment, a guide post extending along the moving direction is further disposed in the accommodation cavity. One end of the guide post is fixedly connected to the inner wall of the lock body, and the other end is slidably connected to the locking tongue. The first return spring is sleeved on the guide post.

[0011] In the above implementation process, one end of the guide post is fixedly connected to the inner wall of the lock body, and the other end is slidably connected to the locking tongue. The axial direction of the guide post is consistent with the moving direction, and the first return spring is sleeved on the guide post. The locking tongue can move along the axial direction of the guide post and move away from the pin along the axial direction of the guide post when the first return spring rebounds, reducing the probability of the locking tongue deviating from the moving direction during movement.

[0012] In combination with the first aspect, in an alternative embodiment, the slideway is annular and has an inlet and an outlet. The lock cover has a chute, and the pin is slidably connected to the chute so that the pin can slide into the slideway from the inlet and outlet, pass through the first latching position, and then slide back to the inlet and outlet.

[0013] In the above implementation process, the slideway is set to be annular with an inlet and an outlet, so that the pin can slide from the inlet and outlet along one side of the annular slideway to the first latching position for latching during the movement of the locking tongue along the moving direction. When the locking tongue continues to move along the moving direction, the pin can exit the first latching position to the other side of the slideway. When the locking tongue continues to move away from the pin, the pin can slide out from the other side of the slideway to the inlet and outlet, and then exit the slideway. Since the locking tongue reciprocates along the moving direction, and the position of the annular slideway in the direction perpendicular to the moving direction will change. In order to adapt to the position change of the annular slideway in the direction perpendicular to the moving direction, the pin is slidably connected to the chute at the lock cover, so that the pin can swing left and right in the direction perpendicular to the moving direction to slide along the slideway.

[0014] In combination with the first aspect, in an alternative embodiment, a first ferrule is slidably disposed in the chute, and the pin is connected to the first ferrule.

[0015] In the above implementation process, the first ferrule is clamped in the chute, and the first ferrule can slide in the chute, thereby driving the pin to slide in the chute.

[0016] In combination with the first aspect, in an alternative embodiment, a second ferrule is sleeved on the middle part of the pin, the second ferrule is connected to the first ferrule through a second return spring, and the second return spring is in a compressed state.

[0017] In the above implementation process, by sleeving the second ferrule on the middle part of the pin, the second ferrule and the first ferrule can be connected with the second return spring. The second return spring is in a compressed state, which can make the end of the pin far from the first ferrule always abut against the slideway.

[0018] In combination with the first aspect, in an alternative embodiment, the annular slideway has a pit at the end far from the first return spring. The pit is concave inward in the opposite direction of the moving direction, and the pit forms a first latching position; the pin can slide into the pit along the slideway during the movement of the lock tongue and slide out of the pit as the lock tongue continues to move in the moving direction.

[0019] In the above implementation process, the annular slideway has a pit at the end far from the first return spring, and the pin can slide into the pit from one side of the slideway. After the thrust force on the lock tongue disappears, the first return spring has a tendency to rebound, and will apply a force on the lock tongue in the opposite direction of the moving direction, causing the pin to abut against the pit. The pin will not slide out of the pit under the action of the abutting force. When the lock tongue continues to move in the moving direction, the pit moves in the direction towards the pin, and the abutting force between the pit and the pin disappears. As the lock tongue continues to move, the pin can slide out of the pit. After the pin slides out of the pit, when the first return spring rebounds and pushes the lock tongue to move away from the pin, the pin can slide out of the other side of the slideway.

[0020] In combination with the first aspect, in an alternative embodiment, the lock body has an opening communicating with the accommodating cavity; the lock body further includes a first claw and a second claw. The connecting ends of the first claw and the second claw are both connected to the lock tongue, and the first claw and the second claw are hinged, so that when the lock head abuts against the connecting end and pushes the lock tongue to move in the moving direction until the pin is latched with the first latching position, the first claw and the second claw can penetrate into the opening and be squeezed by the opening to clamp the lock head.

[0021] In the above implementation process, the connecting ends of the first claw and the second claw are hinged and fixed to the lock tongue. The first claw and the second claw can rotate around the hinge point, enabling the ends of the first claw and the second claw to approach or move away from each other. When the lock head is inserted between the first claw and the second claw, when the ends of the first claw and the second claw approach each other, the ends of the first claw and the second claw will clamp the lock head, achieving the fixation of the lock head and the lock tongue. Therefore, by using the lock head to press against the connecting end, the first claw and the second claw are pushed into the opening of the lock body. The body wall of the lock body at the opening will squeeze the first claw and the second claw, causing the first claw and the second claw to rotate and approach each other. When the lock tongue moves to the position where the pin is engaged in the first connection position, the first claw and the second claw can clamp the lock head.

[0022] Combined with the first aspect, in an alternative embodiment, the lock body further includes a third return spring. The two ends of the third return spring are respectively connected to the first claw and the second claw. The third return spring can contract when the first claw and the second claw penetrate into the opening, and rebound when the first return spring rebounds and pushes the first claw and the second claw out of the opening, loosening the lock head.

[0023] In the above implementation process, the two ends of the third return spring are connected to the first claw and the second claw. When the first claw and the second claw penetrate into the opening, the first claw and the second claw approaching each other will squeeze the third return spring, causing the third return spring to be in a compressed state. When the first claw and the second claw exit the opening, the squeezing force of the body wall of the lock body at the opening on the first claw and the second claw decreases, resulting in a decrease in the squeezing force on the third return spring. Therefore, the third return spring can rebound, enabling the first claw and the second claw to rotate around the hinge point and move away from each other, no longer clamping the lock head, eliminating the fixing effect between the lock head and the lock tongue, and achieving unlocking.

[0024] In a second aspect, an example of the present application provides a vehicle body having a box body and a door panel for closing the box body; a lock provided in the first aspect is further provided in the vehicle body; the lock head is provided on the door panel, and the lock body and the lock cover are provided on the box body.

[0025] In the above implementation process, the lock head provided in the first aspect is provided on the door panel, and the lock body and the lock cover are provided on the box body. When the door panel needs to be closed, the door panel can be pushed, causing the lock head at the door panel to press against the lock tongue at the box body, pushing the lock tongue to move along the moving direction until the pin is engaged in the first engagement position, fixing the lock head and the lock tongue, and thus achieving locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0027] Figure 1Schematic diagram of a single-latch lock structure provided for the comparative technology;

[0028] Figure 2 Schematic diagram of a double-latch lock structure provided for the comparative technology;

[0029] Figure 3 Schematic diagram of a single-latch lock handle socket structure provided for the comparative technology;

[0030] Figure 4 Schematic diagram of the lock structure provided for the example of this application;

[0031] Figure 5 Exploded view of the lock provided for the example of this application;

[0032] Figure 6 Schematic diagram of the lock body structure provided for the example of this application;

[0033] Figure 7 Schematic diagram of the lock cover structure provided for the example of this application;

[0034] Figure 8 Schematic diagram of the claw structure provided for the example of this application;

[0035] Figure 9 Partial schematic diagram of the vehicle body provided for the example of this application.

[0036] Icon: 1 - lock; 10 - lock body; 11 - accommodation cavity; 12 - latch; 13 - slideway; 131 - first clamping position; 132 - inlet and outlet; 14 - first return spring; 15 - guide post; 16 - opening; 17 - first claw; 18 - second claw; 19 - third return spring; 20 - lock cover; 21 - pin; 22 - chute; 23 - first bushing; 24 - second return spring; 25 - second bushing; 26 - clip; 30 - lock head; 31 - through hole; D1 - moving direction; 100 - vehicle body; 2 - box body; 3 - door panel. Detailed implementation manners

[0037] The embodiments of the technical solutions of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of this application more clearly, so they are only examples and cannot be used to limit the protection scope of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0040] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "middle", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] Currently, the overhead boxes on the market all use latch-blocking door handle locks, which are mainly divided into two categories: as Figure 1 shown, the single-latch type and Figure 2 shown, the double-latch type.

[0043] However, for the single-latch type and double-latch type, it is necessary to form a handle recess on the door panel, which will affect the overall aesthetic appearance. As Figure 3 shown, the single-latch type lock requires a handle recess structure to be formed on the door panel, which will affect the aesthetics of the overall structure and increase the production difficulty of the door panel.

[0044] If a hidden PUSH lock is applied to the overhead box, there is no need to set a handle recess structure on the door panel, which can improve the aesthetics of the overall structure and reduce the production difficulty of the door panel.

[0045] However, the locking force of the current hidden PUSH lock mechanism is relatively small, generally only able to withstand a forced opening force of 10 - 20 N. Since the overhead box of a commercial vehicle generally allows a load of 10 KG, in order to ensure the use safety, the forced opening force of the door panel needs to be ≥ 100 N. Therefore, the current hidden PUSH lock mechanism cannot be directly applied to the overhead box.

[0046] Therefore, the present application provides a lock and a vehicle body, which can improve the locking force to a certain extent. To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0047] Please refer to Figure 4 and Figure 5 , an example of the present application provides a lock 1, including a lock body 10, a lock cover 20, and a lock head 30.

[0048] Please refer to Figure 6 , the lock body 10 has a receiving cavity 11, a movable lock tongue 12 is arranged in the receiving cavity 11, the lock tongue has a slideway 13, and a first clamping position 131 is arranged inside the slideway 13.

[0049] Please combine Figure 4 and Figure 5 , the lock cover 20 covers the lock body 10, and a pin 21 protrudes from the side of the lock cover 20 facing the lock tongue 12.

[0050] The lock head 30 is detachably connected to the lock tongue 12.

[0051] The lock head 30 can push the lock tongue 12 to move along the moving direction D1 close to the pin 21 under the action of an external force. When the pin slides along the slideway 13 to the first clamping position 131 for clamping, the lock head 30 is clamped with the lock tongue 12.

[0052] When it is necessary to lock the door, a thrust can be applied to the lock head 30, and the lock head 30 is used to push the lock tongue 12 to move along the moving direction D1 close to the pin 21, so that the pin 21 can slide in the slideway 13 of the lock tongue 12. When the pin 21 slides to the first clamping position 131 of the slideway 13, the pin 21 can be clamped at the first clamping position 131. At this time, the lock tongue 12 can fasten the lock head 30. Then, the thrust applied to the lock head 30 is removed. Under the clamping action between the pin 21 and the first clamping position 131, the lock tongue 12 cannot move, and the lock tongue 12 and the lock head 30 can always be fixedly connected together to achieve locking.

[0053] Furthermore, in some possible embodiments, please continue to refer to Figure 5 and Figure 6 , a first return spring 14 is further arranged in the receiving cavity 11, and both ends of the first return spring 14 along the moving direction D1 are respectively connected to the lock tongue 12 and the inner wall of the lock body 10.

[0054] When locking is required, a thrust is applied to the lock head 30 in the initial position. When the lock tongue 12 is pushed by the lock head 30 to move along the moving direction D1, the pin 21 slides into the first latching position 131 along the slideway 13 and latches with the first latching position 131, and the lock tongue 12 latches with the lock head 30 to achieve locking. During the movement, the lock tongue 12 applies a thrust to the first return spring 14, causing the first return spring 14 to contract.

[0055] When unlocking is required, continue to use the lock head 30 to push the lock tongue 12 to move along the moving direction D1 until the pin 21 exits the first latching position 131. Then, remove the thrust on the lock head 30. At this time, the compression force of the lock tongue 12 on the first return spring 14 disappears, and the first return spring 14 can rebound, pushing the lock tongue 12 and the lock head 30 to move in the opposite direction of the moving direction D1, pushing the lock tongue 12 and the lock head 30 to the initial position, and the latching effect between the lock tongue 12 and the lock head 30 is eliminated to complete unlocking.

[0056] In some possible embodiments, please continue to refer to Figure 5 and Figure 6 , first return springs 14 can be provided on both sides of the lock tongue 12.

[0057] Furthermore, in order to reduce the probability that the lock tongue 12 deviates from the moving direction D1 during movement, in some possible embodiments, please continue to refer to Figure 5 and Figure 6 , a guiding column 15 can be provided.

[0058] One end of the guiding column 15 is connected to the inner wall of the lock body 10, and the other end of the guiding column 15 is slidably connected to the lock tongue 12. The first return spring 14 is sleeved on the guiding column 15. Therefore, when the lock tongue 12 is pushed to move along the moving direction D1, the lock tongue 12 can move along the guiding column 15 and compress the first return spring 14. When the first return spring 14 is compressed, the first return spring 14 is always sleeved outside the guiding column 15 and will not warp. After the external force applied to the lock tongue 12 is eliminated, the first return spring 14 can rebound along the guiding column 15 and push the lock tongue 12 to retreat along the guiding column 15 in the direction away from the pin 21.

[0059] Furthermore, in some possible embodiments, please continue to refer to Figure 6 , the slideway 13 can be annular and has an inlet and outlet 132. That is, the pin 21 can slide into the slideway 13 from the inlet and outlet 132 and can slide out of the inlet and outlet 132 after sliding along the slideway 13.

[0060] Exemplarily, the path of the slideway 13 is generally oval.

[0061] Further, in order to facilitate the pin 21 to slide into the first clamping position 131 along the slideway 13 for clamping with the first clamping position 131 and to be able to withdraw from the first clamping position 131 when the locking tongue 12 continues to move, in some possible embodiments, please continue to refer to Figure 6 the first clamping position 131 can be set as a pit structure, and the pit is arranged at one end of the slideway 13 away from the pin 21. The pit is concave in the opposite direction of the moving direction D1.

[0062] The annular slideway 13 has a pit at one end away from the first return spring 14. When the locking tongue 12 is pushed to move along the moving direction D1, the pin 21 can slide into the pit from one side of the slideway 13, and at the same time the first return spring 14 is compressed and contracted. After the pin 21 slides into the pit, the thrust on the locking tongue 12 is removed. At this time, the first return spring 14 has a tendency to rebound and will exert a force on the locking tongue 12 in the opposite direction of the moving direction D1, so that the pin 21 abuts against the pit, and the pin 21 will not slide out of the pit under the action of the abutting force, thereby enabling the locking tongue 12 and the lock head 30 to be firmly connected.

[0063] When unlocking is required, continue to push the locking tongue 12 to move along the moving direction D1. Therefore, the pit moves in the direction towards the pin 21, and the abutting force between the pit and the pin 21 disappears. The pin 21 can slide out of the pit as the locking tongue 12 continues to move. After the pin 21 slides out of the pit, the thrust on the locking tongue 12 is removed, and the locking tongue 12 and the lock head 30 can return to the initial position in the opposite direction of the moving direction D1 under the action of the rebound of the first return spring 14, and the clamping effect between the locking tongue 12 and the lock head 30 is eliminated, completing the unlocking.

[0064] Since the shape of the slideway 13 is annular, the position of the annular slideway 13 in the direction perpendicular to the moving direction D1 will change. For example, if the moving direction D1 is the X-axis and the direction perpendicular to the moving direction D1 is the Y-axis, the coordinates (X, Y) of each position on the path of the slideway 13 will change. Therefore, when the locking tongue 12 moves along the moving direction D1, the pin 21 needs to move left and right along the Y-axis direction to adapt to the path of the slideway 13.

[0065] Further, in one possible embodiment, please refer to Figure 7 the lock cover 20 has a chute 22, and the pin 21 is slidably connected to the chute 22 so that the pin 21 can slide into the slideway 13 from the inlet / outlet 132, and slide back to the inlet / outlet 132 after passing through the first clamping position 131.

[0066] Exemplarily, please continue to refer to Figure 7 the shape of the chute 22 is a waist-shaped groove.

[0067] Further, in order to facilitate the sliding connection between the pin 21 and the chute 22, in some possible embodiments, please continue to refer toFigure 7 A first ferrule 23 can be slidably arranged in the chute 22, and the pin 21 is connected to the first ferrule 23.

[0068] The outer wall of the first ferrule 23 fits against the wall of the chute 22, and the first ferrule 23 is snapped into the chute 22.

[0069] Further, in order to improve the stability of the first ferrule 23 in the chute 22 and reduce the probability of the first ferrule 23 falling out of the chute 22, in a possible embodiment, a through hole can be provided at the bottom of the chute 22, the pin 21 passes through the through hole into the first ferrule 23, and a clip 26 is provided at one end of the pin 21 away from the first ferrule 23, and the clip 26 can abut against the wall of the through hole.

[0070] When the lock cover 20 is covered on the lock body 10, the depth of the pin 21 provided at the lock cover 20 extending into the receiving cavity 11 of the lock body 10 will be relatively fixed. In order to enable one end of the pin 21 to always abut tightly against the slideway 13, in some possible embodiments, please refer to Figure 5 and Figure 7 A second return spring 24 can be provided between the pin 21 and the first ferrule 23, and the second return spring 24 is in a compressed state.

[0071] Further, in order to facilitate the connection of the second return spring 24, in a possible embodiment, please refer to Figure 5 and Figure 7 A second ferrule 25 is sleeved on the middle part of the pin 21, and both ends of the second return spring 24 are fixed to the first ferrule 23 and the second ferrule 25 respectively.

[0072] Further, in order to facilitate the locking tongue 12 to be engaged with the lock head 30 when the locking tongue 12 moves along the moving direction D1 to the position where the pin 21 slides into the first engaging position 131, and in order to enable the lock head 30 to be separated from the locking tongue 12 after the pin 21 exits the first engaging position 131 and the locking tongue 12 and the lock head 30 return to the initial state, in some possible embodiments, please refer to Figure 5 and Figure 8 The lock body 10 has an opening 16 communicating with the receiving cavity 11. The lock body 10 further includes a first claw 17 and a second claw 18. The connecting ends of the first claw 17 and the second claw 18 are both connected to the locking tongue 12, and the first claw 17 and the second claw 18 are hinged, so that when the lock head 30 abuts against the connecting end and pushes the locking tongue 12 to move along the moving direction D1 to the position where the pin 21 is engaged with the first engaging position 131, the first claw 17 and the second claw 18 can penetrate into the opening 16 and be squeezed by the opening 16 to clamp the lock head 30.

[0073] Further, in order to facilitate the automatic opening of the first jaw 17 and the second jaw 18 after they withdraw from the opening 16, so as to loosen the lock head 30, in a possible embodiment, please continue to refer to Figure 5 The lock body 10 further includes a third return spring 19. Both ends of the third return spring 19 are respectively connected to the first jaw 17 and the second jaw 18. The third return spring 19 can contract when the first jaw 17 and the second jaw 18 penetrate into the opening 16, and can rebound when the first return spring 14 pushes the first jaw 17 and the second jaw 18 to withdraw from the opening 16, thereby loosening the lock head 30.

[0074] Further, in order to facilitate using the lock head 30 to abut against the connecting ends of the first jaw 17 and the second jaw 18 to push the lock tongue 12 to move, and to be able to clamp the lock head 30 when the first jaw 17 and the second jaw 18 are squeezed and rotate in the direction of approaching each other, in a possible embodiment, please continue to refer to Figure 8 The lock head 30 has a flat plate and a protrusion protruding from the flat plate. The protrusion is triangular. The top end of the protrusion is used to connect with the connecting end. A through hole 31 is provided in the middle of the protrusion so that the first jaw 17 and the second jaw 18 can penetrate into the through hole to clamp the lock head 30.

[0075] Further, a step for abutting against the end of the protrusion can be provided at the connecting ends of the first jaw 17 and the second jaw 18.

[0076] Further, threaded holes can be provided at the flat plate of the lock head 30 to facilitate fixing the lock head 30 to the door panel 3.

[0077] Further, the present application example also provides a vehicle body 100. Please refer to Figure 9 The vehicle body 100 has a box body 2 and a door panel 3 for closing the box body 2; a lock 1 is also provided inside the vehicle body 100. The lock head 30 is arranged on the door panel 3, and the lock body 10 and the lock cover 20 are arranged on the box body 2.

[0078] Exemplarily, the box body 2 is an overhead box. The lock head 30 is fixed to the door panel 3 by screws. The door panel 3 is fixed to the hinge by bolts. The hinge is fixed to the cross beam by bolts. The cross beam is fixed to the partition by screws. Then, one end of the gas spring is directly connected to the hinge, and the other end is connected to the partition. In this way, the gas spring always provides a supporting force. The lock body 10 and the lock cover 20 are fixed to the bearing plate by screws. The bearing plate is connected to the partition. When closing the door, just press the door panel 3 until the lock tongue 12 is locked with the lock head 30.

[0079] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A lock, characterized in that: include: A lock body, wherein the lock body has an accommodating cavity, a movable lock tongue is arranged in the accommodating cavity, the lock tongue has a slideway, and the interior of the slideway has a first clamping position; A lock cover, the lock cover is arranged on the lock body, and a pin is protruded from one side of the lock cover toward the lock tongue; A lock head, the lock head being detachably connected to the lock tongue; The lock head can push the lock tongue to move along the moving direction close to the pin under the action of external force, so that when the pin slides along the slideway to the first engaging position for engagement, the lock head is engaged with the lock tongue.

2. The lock according to claim 1, characterized in that: A first return spring is also provided in the accommodating cavity, and the two ends of the first return spring along the moving direction are respectively connected to the lock tongue and the inner wall of the lock body; when the lock head pushes the lock tongue to move along the moving direction, the first return spring contracts; after the pin withdraws from the first clamping position and the external force disappears, the first return spring can rebound, so that the lock tongue and the lock head move in a direction away from the pin, and the lock tongue is separated from the lock head.

3. The lock according to claim 2, characterized in that: A guide column extending along the moving direction is also provided in the accommodating cavity, one end of the guide column is fixedly connected to the inner wall of the lock body, and the other end is slidably connected to the lock tongue; the first reset spring is sleeved on the guide column.

4. The lock according to claim 2, characterized in that: The slide is annular and has an inlet and outlet; the lock cover has a slide groove, and the pin is slidably connected to the slide groove, so that the pin can slide into the slide from the inlet and outlet, and slide back to the inlet and outlet after passing the first clamping position.

5. The lock according to claim 4, characterized in that: A first clamping sleeve is slidably arranged in the slide groove, and the pin is connected to the first clamping sleeve.

6. The lock according to claim 5, characterized in that: A second clamping sleeve is sleeved on the middle part of the pin, and the second clamping sleeve is connected to the first clamping sleeve through a second return spring, and the second return spring is in a compressed state.

7. The lock according to claim 4, characterized in that: The annular slide has a pit at one end away from the first return spring, and the pit is concave inward in the opposite direction of the moving direction, and the pit forms the first clamping position; the pin can slide into the pit along the slide during the movement of the lock tongue, and slide out of the pit as the lock tongue continues to move along the moving direction.

8. The lock according to claim 2, characterized in that: The lock body has an opening communicating with the accommodating cavity; The lock body also includes a first claw and a second claw, the connecting ends of the first claw and the second claw are connected to the lock tongue, and the first claw and the second claw are hinged, so that when the lock head abuts against the connecting end to push the lock tongue to move along the moving direction until the pin is engaged with the first engaging position, the first claw and the second claw can pass through the opening and be squeezed by the opening to clamp the lock head.

9. The lock according to claim 8, characterized in that The lock body also includes a third return spring, both ends of which are respectively connected to the first claw and the second claw. The third return spring can contract when the first claw and the second claw pass through the opening, and rebound when the first return spring pushes the first claw and the second claw to exit the opening, thereby loosening the lock head.

10. A vehicle body, characterized in that: The vehicle body comprises a box body and a door panel for closing the box body; the vehicle body is also provided with a lock as claimed in any one of claims 1 to 9; the lock head is provided on the door panel, and the lock body and the lock cover are provided on the box body.

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