Locking mechanism and driving recorder

Abstract

The present invention relates to a locking mechanism and a driving recorder, wherein the locking mechanism comprises: a host base, a support base and a brake assembly; the support base is mounted on the host base; the brake assembly comprises a stopper, the stopper has a reciprocating motion stroke relative to the host base and has a first position and a second position, wherein in the first position, the stopper abuts against the support base to prevent the support base from being separated from the host base, and in the second position, the stopper provides an escape passage for the support base to be separated from the host base or for the support base to be mounted on the host base. The host base is rotatably connected to the support base without the need for additional connecting parts, which is convenient and quick. By arranging the brake assembly on the host base, during the process of connecting the host base to the support base, the stopper in the brake assembly rotates relative to the support base and abuts against the support base after the connection is completed to prevent the support base from retreating when subjected to external force and causing separation from the host base, thereby enhancing the stability of the connection.

Description

Technical Field

[0001] The invention relates to the field of automotive electronic products, and in particular to a locking mechanism and a driving recorder. Background Art

[0002] In the mechanical field, two parts are often connected together to achieve the required functions. The connection method used needs to be easy to disassemble and assemble to replace new parts or to facilitate grouping and storage. For example, threaded connection and snap-on connection are used in the prior art. Threaded connection has stable performance, but the component cost is high and the efficiency is relatively low; snap-on connection requires fewer components and has lower cost, but the connection performance is unstable, especially when the equipment is subjected to impact force, which is not conducive to the use of the equipment and may even cause damage to the equipment. Summary of the invention

[0003] Based on this, it is necessary to provide a locking mechanism and a driving recorder to address the problem of unstable connection performance of traditional connection structures.

[0004] A locking mechanism comprises: a mainframe base, a support base and a brake assembly; the support base is mounted on the mainframe base; the brake assembly comprises a stop portion, the stop portion has a reciprocating motion stroke relative to the mainframe base and has a first position and a second position, wherein in the first position, the stop portion abuts against the support base to prevent the support base from detaching from the mainframe base, and in the second position, the stop portion provides an escape passage for the support base to detach from the mainframe base or for the support base to be mounted on the mainframe base.

[0005] In one of the embodiments, the support seat is provided with a screw-on portion, and the main engine base is provided with a bone inserting portion which is rotatably engaged with the screw-on portion; the main engine base is also provided with a displacement through hole, and the stop portion can move back and forth in the displacement through hole, and when in the first position, the stop portion abuts against the screw-on portion.

[0006] In one embodiment, there are at least two of the screw-on parts and the bone-inserting parts, and the displacement through hole is located between the two bone-inserting parts.

[0007] In one embodiment, the support seat includes a connecting plate, the end surface of the connecting plate facing the main engine base is provided with an annular protrusion, and the screw-on portion is arranged on the circumferential outer surface of the annular protrusion; a mounting portion is provided on the main engine base, and the mounting portion has a accommodating cavity with one end open and the other end closed, and the bone inserting portion is accommodated in the accommodating cavity; the displacement through hole is located at the closed end of the mounting portion.

[0008] In one embodiment, the bottom end surface of the annular protrusion is provided with a continuous convex arc surface and a concave arc surface; the end surface of the mounting portion facing the annular protrusion is provided with an arc-shaped protrusion; when the stop portion is located at the first position, the arc-shaped protrusion abuts against the concave arc surface.

[0009] In one of the embodiments, an anti-mistake portion is provided on the end surface of the mounting portion facing the annular protrusion, and an avoidance groove cooperating with the anti-mistake portion is provided on the annular protrusion.

[0010] In one embodiment, the brake assembly also includes a button, an elastic element and a limit plate, the stop portion is located on the button, and the elastic element is located between the button and the limit plate; the host base is provided with a mounting through hole for assembling the button, and the mounting through hole is connected with the displacement through hole; when the stop portion is located at the first position, the stop portion extends into the accommodating cavity through the displacement through hole and abuts against the screw-on portion; when the stop portion is located at the second position, the stop portion withdraws from the accommodating cavity.

[0011] In one of the embodiments, the button is provided with a limiting boss or a limiting groove in its displacement direction, and the mounting through hole is provided with a limiting groove or a limiting boss that cooperates with the limiting boss or the limiting groove to limit the movement stroke of the button when it returns to its original position.

[0012] In one of the embodiments, the limit plate is provided with a step hole, and the host base is provided with a claw and a stop portion; one end of the button cooperates with the mounting through hole, and the other end is located in the step hole and can move back and forth relative to the step hole; the two end surfaces of the limit plate perpendicular to the movement direction of the button are respectively in contact with the claw and the stop portion.

[0013] A driving recorder comprises a suction cup bracket, an electronic camera and the above-mentioned locking mechanism, wherein the suction cup bracket is connected to a support seat of the locking mechanism, the electronic camera is connected to a host base of the locking mechanism, and the suction cup bracket is used to fix the driving recorder.

[0014] The locking mechanism and the driving recorder have at least the following beneficial effects: the host base is rotatably connected to the support base, no additional connecting parts are required, cost is saved, and it is convenient and quick. By arranging a brake assembly on the host base, during the process of connecting the host base to the support base, the stopper in the brake assembly rotates relative to the support base and abuts against the support base after the connection is completed to prevent the support base from retreating when subjected to external force and causing separation from the host base, thereby enhancing the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the locking mechanism of the present invention.

[0016] Figure 2 It is a schematic diagram of the structural decomposition of the locking mechanism of the present invention.

[0017] Figure 3 It is a schematic cross-sectional structure diagram of the locking mechanism of the present invention in a braking state.

[0018] Figure 4 It is a structural schematic diagram of the support seat in the locking mechanism of the present invention.

[0019] Figure 5 for Figure 4 A partial enlarged schematic diagram of .

[0020] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure from another angle.

[0021] Figure 7 The cross-sectional structure diagram of the locking mechanism of the present invention in a free state is shown in FIG.

[0022] Figure 8a It is a schematic structural diagram of the positional relationship between the brake assembly and the support seat in the braking state in the present invention.

[0023] Figure 8b It is a schematic structural diagram of the positional relationship between the brake assembly and the support seat in the brake release state in the present invention. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] See also Figure 1 The locking mechanism provided by an embodiment of the present invention comprises a mainframe base 100, a support base 200 and a brake assembly 300. The brake assembly 300 is disposed on the mainframe base 100, the mainframe base 100 is connected to the support base 200, and the brake assembly 300 is used to prevent the support base 200 from being separated from the mainframe base 100 when the locking mechanism is impacted by an external force.

[0031] Combination Figure 2As shown, the host base 100 includes a mounting shell 110, and a mounting portion 120 is provided on the mounting shell 110, and the mounting portion 120 includes a base 130 and a circumferential wall 140. The base 130 is fixedly connected to one end of the circumferential wall 140, and is surrounded by a mounting groove with one end open. The mounting groove is used to accommodate at least part of the structure of the support seat 200, so that the mounting shell 110 is matched and connected with the support seat 200. In this embodiment, the circumferential wall 140 is provided with a first bone insertion portion 150, a second bone insertion portion 160 and a third bone insertion portion 170 protruding from the inner surface of the circumferential wall 140. The first bone insertion portion 150 has a long side 151 and a short side 152, and the long side 151 and the short side 152 are perpendicular to each other and are arranged in an "L" shape. The end surface of the short side 152 away from the end of the long side 151 is located in the same plane as the end surface of the base 130. A first interlocking space 153 is formed between the first bone inserting part 150, the circumferential wall 140 and the base 130, which is used for interlocking connection with the structure on the support seat 200. In this embodiment, the second bone inserting part 160 and the third bone inserting part 170 are substantially the same in shape and size as the first bone inserting part 150, and the three are sequentially arranged on the inner surface of the circumferential wall 140 in the same direction. Similarly, a second interlocking space (not numbered in the figure) is formed between the second bone inserting part 160, the circumferential wall 140 and the base 130, and a third interlocking space (not numbered in the figure) is formed between the third bone inserting part 170, the circumferential wall 140 and the base 130, both of which are used for interlocking connection with the structure on the support seat 200.

[0032] It is understandable that the sizes of the second bone inserting portion 160 and the third bone inserting portion 170 can be changed accordingly according to actual matching requirements.

[0033] As an example, in this embodiment, the mounting portion 120 is disposed on one side of the mounting housing 110, and the mounting housing 110 is cut with a vertical section passing through the mounting portion 120 to obtain a cross section of the mounting housing 110, and the outer contour of the cross section is a parabola shape with an opening downward. In other embodiments, the contour of the mounting housing 110 is not limited to the shape shown in the drawings of the specification.

[0034] Continue to combine Figure 2 As shown, the installation housing 110 is provided with a displacement through hole 180, and the displacement through hole 180 is used to provide displacement space for the components on the brake assembly 300. Specifically, the displacement through hole 180 is arranged on the base 130 of the installation part 120, and is located between the first bone insertion part 150 and the third bone insertion part 170. The displacement through hole 180 extends from the edge position of the base 130 to the center position thereof by a set length, and the set length is set according to the specific stroke of the brake assembly 300. In this embodiment, the shape of the displacement through hole 180 is square but not limited to square.

[0035] Continue to combine Figure 2As shown, an arc-shaped protrusion is provided on the base 130 of the mounting portion 120, which is used to cooperate with the end face of the support seat 200 facing the base 130, so as to identify whether it is accurately installed in place during the installation process, and also has the function of assisting in preventing the support seat 200 from retreating. The cross section of the arc-shaped protrusion is a convex arc surface. In this embodiment, two arc-shaped protrusions are provided, including a first arc-shaped protrusion 141 located between the first bone insertion portion 150 and the second bone insertion portion 160, and a second arc-shaped protrusion 142 between the second bone insertion portion 160 and the third bone insertion portion 170. The arc-shaped protrusion extends from the edge position of the base 130 to its center position for a set length.

[0036] Continue to combine Figure 2 As shown, the base 130 of the mounting portion 120 is also provided with an anti-mistake portion 132, which cooperates with the support seat 200 to prevent misoperation during installation. In this embodiment, the anti-mistake portion 132 is located between the first bone insertion portion 150 and the third bone insertion portion 170, but does not interfere with the displacement through hole 180.

[0037] Continue to combine Figure 2 As shown, a mounting through hole 190 is provided at a position corresponding to the displacement through hole 180 on the mounting housing 110. In this embodiment, the mounting through hole 190 is provided at the top of the mounting housing 110. The mounting through hole 190 is connected to the displacement through hole 180. The mounting through hole 190 and the displacement through hole 180 are used together to mount the brake assembly 300. The brake assembly 300 has a motion stroke relative to the mounting through hole 190 and the displacement through hole 180. Figure 3 As shown, a recessed groove 191 is provided at the bottom of the mounting through hole 190, that is, the recessed groove 191 extends from the bottom end surface of the mounting through hole 190 to the top, and the depth of the recessed groove 191 is set according to the structure on the brake assembly 300 that cooperates therewith. The recessed groove 191 is used to limit the stroke of the brake assembly 300 in the mounting through hole 190. The mounting shell 110 is formed with a claw 192 at a position near the mounting through hole 190, and the claw 192 is similar to an "L" shape. The upper end surface of the short side of the claw 192 cooperates with the structure at the bottom of the brake assembly 300 to carry the brake assembly 300. The long side of the claw 192 is parallel to the center line of the mounting through hole 190. In this embodiment, two claws 192 are provided, and are symmetrical about the center line of the mounting through hole 190.

[0038] Continue to combine Figure 3 As shown, the mounting housing 110 is formed with a stopper 193 at a position at a set distance from the mounting through hole 190 and at a side of the claw 192 away from the center line of the mounting through hole 190, and the bottom end surface of the stopper 193 is located above the upper end surface of the short side of the claw 192. The stopper 193 and the claw 192 work together to limit the position of the portion of the brake assembly 300 that does not generate displacement relative to the host base 100.

[0039] Combination Figure 2 As shown, the brake assembly 300 includes a button 310, an elastic element 320 and a limit plate 330. In the present embodiment, the button 310 is cylindrical, and the elastic element 320 is a spring. The button 310 includes an integrally formed keycap 311 and a key rod 312 whose center lines coincide with each other. One end of the key rod 312 is located in the hollow chamber of the keycap 311, and the other end extends out of the keycap 311. A boss 314 is provided on the outer surface of the bottom of the keycap 311, and the top end surface of the boss 314 can cooperate with the bottom surface of the groove 191 to limit the stroke of the button 310. It can be understood that in other embodiments, other methods can be used to limit the stroke of the button 310. For example, a groove is provided on the button 310, and a boss that cooperates with the groove is provided in the mounting through hole 190. In combination Figure 2 As shown, a stopper 315 is provided on the radial extension line of the boss 314, and the stopper 315 cooperates with the support base 200 through the displacement through hole 180 on the host base 100 to prevent the support base 200 from being separated from the host base 100 when impacted by external force. Figure 3 As shown, the inner surface of the key cap 311 is provided with a butt plate 313 , and the butt plate 313 is used to abut against the top end surface of the elastic element 320 sleeved on the key rod 312 to limit the movement stroke of the elastic element 320 .

[0040] In this embodiment, the stopper 350 is in the form of a right-angled trapezoid, and the angle between the waist of the right-angled trapezoid and the lower bottom edge is a rounded structure. The side of the stopper 350 away from the boss 314 can be regarded as the waist of the right-angled trapezoid (hereinafter, the side of the stopper 350 away from the boss 314 can be referred to as the waist of the stopper 350).

[0041] Continue to combine Figure 2 As shown, in this embodiment, the limit plate 330 is a rectangular parallelepiped structure, and a step hole 331 is provided at the center position of the limit plate 330 in the thickness direction. When the main engine base 100 cooperates with the brake assembly 300, the key rod 312 is inserted into the step hole 331 and can move relative to the step hole 331. The step surface of the step hole 331 abuts against the bottom end surface of the elastic element 320 sleeved on the key rod 312 to limit the movement stroke of the elastic element 320. The limit plate 330 is provided with a square hole 332 in the thickness direction. In this embodiment, there are two square holes 332, which are respectively located at the left and right ends of the limit plate 330, and the two square holes 332 are symmetrically arranged about the center point of the limit plate 330. The distance between the two square holes 332 is suitable to cooperate with the symmetrically arranged claws 192. It can be combined at the same time Figure 3As shown, when the brake assembly 300 and the main engine base 100 are in an assembled state, the claw 192 cooperates with the bottom end surface of the limit plate 330 through the square hole 332, and plays the role of supporting the limit plate 330, so that the limit plate 330 is fixed relative to the main engine base 100 and will not separate from the main engine base 100 when subjected to external force.

[0042] It is understandable that the shapes of the button 310 and the limiting plate 330 are not limited to the above embodiments, and may be, for example, an elliptical shape.

[0043] Combination Figure 3 As shown, in order to understand the matching relationship between the brake assembly 300 and the host base 100 in the assembled state, Figure 3 No external force is applied to the middle keycap 311. The brake assembly 300 is located on the host base 100. The keycap 311 is inserted into the mounting through hole 190 and exposed outside the mounting through hole 190. The upper end face of the boss 314 on the keycap 311 cooperates with the bottom end face of the groove 191 provided in the mounting through hole 190, the bottom end face of the limit plate 330 cooperates with the end face of the short side of the claw 192, and the top end face of the limit plate 330 cooperates with the bottom end face of the stop portion 193. The elastic element 320 is sleeved on the key rod 312, and its bottom end face abuts against the step surface of the step hole 331 of the limit plate 330, and the top end face abuts against the bottom end face of the abutment plate 313 in the keycap 311. Can be combined at the same time Figure 6 As shown, the stopper 315 extends into the mounting portion 120 through the displacement through hole 180. When an external force is applied to the key cap 311, it can be combined with Figure 7 As shown, the elastic element 320 is compressed, and the stopper 315 moves downward with the button 310 and withdraws from the mounting portion 120. When the external force is removed, the elastic element 320 pushes the button 310 upward under the action of the elastic restoring force, and the stopper 315 moves upward with the button 310 and extends into the mounting portion 120 again through the displacement through hole 180. When the upper end surface of the boss 314 touches the lower end surface of the sink 191, the button 310 is limited and cannot continue to move upward.

[0044] The assembly process of the brake assembly 300 and the host base 100 is as follows: Figure 2 In the direction shown, the button 310 is first installed into the mounting hole 190 from bottom to top, at which time, the stopper 315 extends into the mounting portion 120 through the displacement hole 180. Then the elastic component 320 is sleeved on the key rod 312, and finally the limit plate 330 is connected to the host base 100 through the claw 192.

[0045] Combination Figure 2As shown, the support seat 200 includes a connecting rod 210 and a connecting plate 220, and the connecting rod 210 is used to connect with an external element. A spherical structure 211 is provided at one end of the connecting rod 210 away from the connecting plate 220. In this embodiment, the external element connected to the connecting rod 210 is a suction cup bracket. The suction cup bracket is provided with a spherical inner concave surface for accommodating the spherical structure 211. In this embodiment, the circumferential size of the connecting plate 220 is adapted to the circumferential size of the mounting portion 120 on the mounting shell 110, and a structure connected to the host base 100 is provided on the end face 221 of the connecting plate 220 facing the mounting shell 110. Specifically, an annular protrusion 230 protruding from the end face 221 is provided on the end face 221. A first screw-on portion 231, a second screw-on portion 232 and a third screw-on portion 233 are provided on the outer surface of the annular protrusion 230 in sequence. The first screw-on portion 231 , the second screw-on portion 232 and the third screw-on portion 233 are respectively used for rotationally connecting with the first bone inserting portion 150 , the second bone inserting portion 160 and the third bone inserting portion 170 provided on the host base 100 .

[0046] In the top projection view, the projection area of ​​the annular protrusion 230 is located within the projection area of ​​the connecting plate 220 , and the projections of the circumferential surfaces of the first screw-on portion 231 , the second screw-on portion 232 and the third screw-on portion 233 coincide with the projection of the circumferential surface of the connecting plate 220 .

[0047] Combination Figure 4 As shown, the first screw-on portion 231, the second screw-on portion 232 and the third screw-on portion 233 are all in an "L" shape. In this embodiment, the length of the horizontal side of the "L" is greater than the length of its vertical side. The vertical sides of the first screw-on portion 231, the second screw-on portion 232 and the third screw-on portion 233 are respectively connected to the end surface 221, and the bottom end surfaces of their horizontal sides are all located in the same horizontal plane as the bottom end surface of the annular protrusion 230.

[0048] Taking the first screw-on portion 231 as an example, Figure 4 As shown, the "L"-shaped first screw-on portion 231 includes a long side 241 and a short side 251. In the main projection diagram, a first screw-on cavity 261 is formed between the first screw-on portion 231 and the end face 221 of the connecting plate 220. The first screw-on cavity 261 is roughly in the shape of "П", wherein the opening direction of the "П"-shaped structure is located in the circumferential direction. Similarly, a second screw-on cavity (not marked in the figure) is formed between the second screw-on portion 232 and the end face 221 of the connecting plate 220, and a third screw-on cavity (not marked in the figure) is formed between the third screw-on portion 233 and the end face 221 of the connecting plate 220.

[0049] During the relative rotation between the support base 200 and the host base 100, the long side 151 of the first bone insertion part 150 gradually engages with the first screwing part 231 from the opening direction of the "П"-shaped structure, and the horizontal side of the first screwing part 231 gradually engages with the first interlocking space 153. The interlocking principle of the second screwing part 232 and the second bone insertion part 160 and the third screwing part 233 and the third bone insertion part 170 can refer to the interlocking principle of the first screwing part 231 and the first bone insertion part 150. During the relative rotation between the support base 200 and the host base 100, the second screwing part 232 always remains relative to the displacement through hole 180.

[0050] Continue to combine Figure 4 As shown, the first screw-on portion 231, the second screw-on portion 232 and the third screw-on portion 233 are arranged at set intervals on the circumferential surface of the annular protrusion 230. For ease of understanding and description, the annular protrusion 230 can be regarded as being divided into three arc segments by the first screw-on portion 231, the second screw-on portion 232 and the third screw-on portion 233. Among them, the portion located between the first screw-on portion 231 and the second screw-on portion 232 is regarded as the first arc segment 234, the portion located between the second screw-on portion 232 and the third screw-on portion 233 is regarded as the second arc segment 235, and the portion located between the first screw-on portion 231 and the third screw-on portion 233 is regarded as the third arc segment 236. Figure 4 In the direction shown, a receiving portion 237 is formed in the area between the left end surface of the second screw-on portion 232 and the outer surface of the first arc segment 234 .

[0051] like Figure 8a and Figure 8b As shown, Figure 8a The figure shows the positional relationship between the support seat 200 and the brake assembly 300 in the braking state. Figure 8b The figure shows the relative positional relationship between the support seat 200 and the brake assembly 300 when the brake is released. Specifically, in the braking state, the side of the stopper 315 abuts against the side of the second screw-on portion 232 in the retracting direction to prevent the support seat 200 from retracting and thus detaching from the host base 100 when the locking mechanism is impacted by an external force. In the braking state, the elastic element 320 is compressed, and the stopper 315 and the end surface of the second screw-on portion 232 facing the host base 100 are opposite to but not intersecting with each other.

[0052] Continue to combine Figure 4As shown, the support base 200 is provided with an avoidance groove 222, which is used to cooperate with the foolproof part 132 on the host base 100. When assembling the host base 100 and the support base 200, the installation orientation can be identified by the foolproof part 132 and the avoidance groove 222. Specifically, the avoidance groove 222 is provided on the first arc segment 234, and extends from the bottom end surface of the first arc segment 234 toward the top direction of the first arc segment 234. That is, in the direction from the connecting plate 220 toward the annular protrusion 230, the height of the first arc segment 234 is less than the height of the second arc segment 235 and the third arc segment 236.

[0053] Continue to combine Figure 4 As shown, the bottom end surface of the second arc segment 235 is provided with a continuous first convex arc surface 245 and a first concave arc surface 255. Similarly, the bottom end surface of the third arc segment 236 is provided with a continuous second convex arc surface 246 and a second concave arc surface 256. During the relative rotation between the support base 200 and the host base 100, the first arc-shaped protrusion 141 on the mounting portion 120 slides relative to the first convex arc surface 245, and the second arc-shaped protrusion 142 slides relative to the second convex arc surface 246. When the host base 100 and the support base 200 are in an assembled state, the first arc-shaped protrusion 141 abuts against the first concave arc surface 255, and the second arc-shaped protrusion 142 abuts against the second concave arc surface 256.

[0054] Combination Figure 5 As shown, when installing the main body base 100 and the support base 200, in order to prevent the height of the first arc-shaped protrusion 141 and the second arc-shaped protrusion 142 from affecting the cooperation between the bottom end surface of the base 130 and the annular protrusion 230, a step surface 271 is provided on the bottom end surface of the first screw-on portion 231, and a step surface 281 is provided on the bottom end surface of the third screw-on portion 233, so that the bottom end surface of the first screw-on portion 231 and the bottom end surface of the third screw-on portion 233 have a height difference, which plays a role in avoiding the first arc-shaped protrusion 141 and the second arc-shaped protrusion 142 so that the assembly surfaces can better cooperate.

[0055] Continue to combine Figure 4 As shown, in this embodiment, the long side of the connecting plate 220 facing the first screw-on part 231 is provided with a compensation rib 223. It is understandable that the top end faces of the first bone inserting part 150, the second bone inserting part 160 and the third bone inserting part 170 provided on the mounting housing 110 are not necessarily at the same height from the contour surface of the mounting housing 110. For example, when a large matching gap occurs when the long side 151 of the first bone inserting part 150 is matched with the first screw-on part 231, the compensation rib 223 is used to compensate for the above-mentioned gap. Similarly, the long side of the connecting plate 220 facing the second screw-on part 232 may also be provided with a compensation rib.

[0056] Combination Figure 2As shown, a margin groove 253 is axially provided on one side of the third screw-on portion 233 close to the center line of the annular protrusion 230 , and the margin groove 253 is used to reduce the wall thickness at the corresponding position to prevent shrinkage and deformation.

[0057] The principle of the locking mechanism of this embodiment is: when pre-installing, first assemble the host base 100 and the brake assembly 300. Figure 7 As shown, when the button 310 is pressed, the elastic element 320 is compressed, the stopper 315 moves downward, and the waist of the stopper 315 of the right-angled trapezoidal structure is accommodated in the displacement through hole 180. At this time, the stopper 315 of the right-angled trapezoidal structure will not interfere with the mounting surface of the support seat 200 and the host base 100. The avoidance groove 222 on the support seat 200 corresponds to the foolproof portion 132, and the end surface of the second screw-on portion 232 opposite to the base 130 of the mounting portion 120 corresponds to the displacement through hole 180, so that the support seat 200 and the host base 100 rotate relative to each other, the first screw-on portion 231 is gradually engaged with the first bone inserting portion 150, the second screw-on portion 232 is gradually engaged with the second bone inserting portion 160, and the third screw-on portion 233 is gradually engaged with the third bone inserting portion 170. If the force applied to the button 310 is removed during the relative rotation between the support base 200 and the main host base 100, the stop portion 315 will adhere to the opposite surface of the second screw-on portion 232 under the elastic force of the elastic element 320 and generate sliding friction with the bottom end surface of the second screw-on portion 232; if the external force is not removed during the rotation process, no sliding friction will be generated, and the second screw-on portion 232 will only rotate relative to the displacement through hole 180.

[0058] See also Figure 6 As shown, when the support seat 200 rotates to the right position, the elastic element 320 resets and pushes the button 310 to move, and the stopper 315 moves relative to the displacement through hole 180 under the drive of the button 310, and extends out of the displacement through hole 180 to enter the accommodating portion 237 and abut against the second screw-on portion 232, that is, the waist of the stopper 315 and the part close to the waist enter the mounting portion 120, interfering with the rotation of the second screw-on portion 232. Among them, the waist of the right-angled trapezoidal stopper 350 can avoid interference with the support seat 200 when the brake is released.

[0059] When the locking mechanism needs to be released, an external force is applied to the button 310, and the stopper 315 moves so that its waist is accommodated in the displacement through hole 180, and the support base 200 and the host base 100 rotate relative to each other in opposite directions to unlock. The above locking mechanism does not require too many parts, has a simple structure, low cost, and stable connection performance.

[0060] A driving recorder includes a suction cup bracket, an electronic camera and any one of the above-mentioned locking mechanisms, wherein the suction cup bracket is used to be fixed on a vehicle body structure and connected to a support base 200 of the locking mechanism. The suction cup bracket has a spherical inner concave surface, and a spherical structure 211 on the support base 200 is accommodated in the spherical inner concave surface, and the support base 200 can rotate relative to the suction cup bracket. The electronic camera is detachably connected to a host base 100 of the locking mechanism, and the shooting angle of the electronic camera can be adjusted by relatively rotating the support base 200 and the suction cup bracket.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A locking mechanism, characterized in that: include: A host base, a support base and a brake assembly; the support base is installed on the host base; the brake assembly includes a stop portion, the stop portion has a reciprocating motion stroke relative to the host base and has a first position and a second position, wherein in the first position, the stop portion abuts against the support base to prevent the support base from being separated from the host base, and in the second position, the stop portion provides an escape passage for the support base to be separated from the host base or for the support base to be installed on the host base; a screw-on portion is provided on the support base, and a bone-inserting portion rotatably engaged with the screw-on portion is provided on the host base; a displacement through hole is also provided on the host base, the stop portion can reciprocate in the displacement through hole, and in the first position, the stop portion abuts against the screw-on portion; There are at least two screw-on parts and at least two bone-inserting parts, and the displacement through hole is located between the two bone-inserting parts; The support seat comprises a connecting plate, the end surface of the connecting plate facing the host base is provided with an annular protrusion, the screw-on portion is arranged on the circumferential outer surface of the annular protrusion; the host base is provided with a mounting portion, the mounting portion has a receiving cavity with one end open and the other end closed, the bone inserting portion is accommodated in the receiving cavity; the displacement through hole is located at the closed end of the mounting portion; The brake assembly also includes a button, an elastic element and a limit plate, the stop portion is located on the button, and the elastic element is located between the button and the limit plate; the host base is provided with a mounting through hole for assembling the button, and the mounting through hole is connected with the displacement through hole; when the stop portion is located at the first position, the stop portion extends into the accommodating cavity through the displacement through hole and abuts against the screw-on portion; when the stop portion is located at the second position, the stop portion withdraws from the accommodating cavity.

2. The locking mechanism according to claim 1, characterized in that: The bottom end surface of the annular raised portion is provided with a continuous convex arc surface and a concave arc surface; the end surface of the mounting portion facing the annular raised portion is provided with an arc-shaped protrusion; when the stop portion is located at the first position, the arc-shaped protrusion abuts against the concave arc surface.

3. The locking mechanism according to claim 1, characterized in that: An anti-mistake portion is provided on the end surface of the mounting portion facing the annular protrusion, and an avoidance groove cooperating with the anti-mistake portion is provided on the annular protrusion.

4. The locking mechanism according to claim 1, characterized in that: The button is provided with a limiting boss or a limiting groove in its displacement direction, and the mounting through hole is provided with a limiting groove or a limiting boss that cooperates with the limiting boss or the limiting groove to limit the movement stroke of the button when it returns to its original position.

5. The locking mechanism according to claim 1, characterized in that: The limit plate is provided with a step hole, and the host base is provided with a claw and a stop portion; one end of the button cooperates with the mounting through hole, and the other end is located in the step hole and can move back and forth relative to the step hole; the two end surfaces of the limit plate perpendicular to the movement direction of the button are respectively in contact with the claw and the stop portion.

6. A driving recorder, characterized in that: It comprises a suction cup bracket, an electronic camera and the locking mechanism described in any one of claims 1 to 5, wherein the suction cup bracket is used to be fixed on the vehicle body structure and connected to the support seat of the locking mechanism, and the electronic camera is connected to the main host base of the locking mechanism.

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