Camera movement mechanism

Abstract

The utility model relates to a camera movement mechanism, which comprises a shell, a bracket for bearing a camera, a transmission shaft rotationally arranged in the shell, a driving piece capable of driving the transmission shaft to rotate, and a coupling piece connected with the end part of the transmission shaft and the output end of the driving piece, a guide shaft is arranged on the side of the transmission shaft in parallel, a sliding block is arranged on the transmission shaft in a penetrating mode, the support comprises a guide hole formed in the guide shaft in a penetrating mode and a clamping groove connected with the sliding block in an embedded mode, and a shock pad is arranged between the sliding block and the clamping groove. The camera movement mechanism designed by the utility model can control the camera to move stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle camera technology field especially relates to a camera movement mechanism. BACKGROUND

[0002] With the development of automobile intelligence and technology, the application of in-vehicle cameras is becoming more and more widespread, which plays an important role in ensuring driving safety and improving driving experience. With the rise of the concept of intelligent cockpit, the functional requirements for in-vehicle cameras are becoming higher and higher, for example, driver fatigue monitoring, gesture recognition, facial recognition and other functions are required. Currently, most in-vehicle cameras are fixedly installed, and the position and angle are relatively fixed, which is difficult to adjust flexibly according to different use scenarios and user needs. Moreover, the camera starts by default when the vehicle starts, and the related data will be transmitted to the vehicle manufacturer's server, which is not conducive to privacy protection. Therefore, it is necessary to design a mechanism that can realize the movement of the camera, which can retract the camera into the shell to protect the user's privacy without using the camera. SUMMARY

[0003] In view of the above problems, the purpose of the utility model is to design a camera movement mechanism that can control the stable movement of the camera.

[0004] The purpose of the utility model is achieved by the following technical scheme:

[0005] A camera movement mechanism is designed, which includes a shell, a support for carrying a camera, a transmission shaft rotatably arranged in the shell, a driving member for driving the transmission shaft to rotate, a shaft coupling connecting the end of the transmission shaft and the output end of the driving member, a guide shaft arranged in parallel on the side of the transmission shaft, a sliding block arranged on the transmission shaft, the support including a guide hole arranged on the guide shaft and a clamping groove connected with the sliding block, and a damping pad arranged between the sliding block and the clamping groove.

[0006] The camera movement mechanism designed in this scheme combines precise mechanical transmission and damping and buffering technology, and can realize the stable movement of the camera to prevent shaking and abnormal sound. The transmission shaft and the guide shaft are arranged in parallel to form a space constraint system, the transmission shaft bears the function of driving force transmission, and the guide shaft provides a linear motion reference. The guide hole and the clamping groove of the support correspond to the guide shaft and the transmission shaft respectively, realizing XY plane positioning and Z axis rotation limitation. The transmission shaft is connected with the output end of the driving member through the shaft coupling, and the driving member drives the transmission shaft to rotate to drive the sliding block to move axially, and then drives the camera support to move along the guide shaft. By arranging the damping pad between the sliding block and the clamping groove, the gap between them can be eliminated, and they can be tightly fitted, which can effectively reduce the shaking and abnormal sound of the camera support during movement, and then ensure the stable movement of the camera.

[0007] Furthermore, the drive shaft includes a threaded section, and the slider includes a sliding portion threadedly connected to the threaded section and an engaging portion connected to the slot.

[0008] The sliding part of the slider is provided with a through hole, and the inner wall of the through hole is provided with an internal thread that matches the external thread of the threaded section of the drive shaft. The smoothness and quietness of the slider movement are ensured through threaded transmission.

[0009] Furthermore, the shock-absorbing pad is provided with a receiving cavity, and the fitting part is embedded in the receiving cavity.

[0010] The design of the accommodating cavity and the fitting part expands the contact area, allowing the impact force to be evenly distributed throughout the damping pad via the cavity structure, avoiding localized stress concentration. This design converts high-frequency vibrations into energy absorption through the elastic deformation of the material, reducing the amplitude of vibration transmitted to the main body of the equipment. Simultaneously, by evenly distributing stress, the accommodating cavity structure can delay the aging and cracking of the elastic material. The physical locking between the fitting part and the accommodating cavity prevents component slippage or loosening caused by vibration, effectively reducing the failure rate.

[0011] Furthermore, the fitting part is provided with a limiting groove on its periphery, and the inner wall of the accommodating cavity is provided with a limiting protrusion that cooperates with the limiting groove.

[0012] The design of the limiting groove and limiting protrusion is similar to a "mortise and tenon structure", which can achieve precise alignment without complex fasteners, reduce installation errors, and effectively limit the lateral sliding of the mating part under vibration or impact.

[0013] Furthermore, the drive shaft also includes a coupling section located at one end of the threaded section and connected to the coupling member, the coupling section being provided with a first bushing fixed to the housing.

[0014] The first bushing is attached to the housing by screws, forming a stable support structure. The first bushing provides bidirectional support for the drive shaft, bearing the radial load (perpendicular to the axis) and axial load (along the axis) generated when the drive shaft rotates, preventing the drive shaft from bending or vibrating due to uneven force.

[0015] Furthermore, the drive shaft also includes a support section located at the other end of the threaded section, and the support section is provided with a second bushing fixed to the housing.

[0016] The second bushing is pressed into the corresponding through hole of the housing, and the two bushings are press-fitted together to form a stable support structure. The first bushing and the second bushing together form a stable support system for the drive shaft, which can effectively suppress the lateral vibration and harmonic resonance of the drive shaft. With the addition of damping materials, abnormal noise and vibration can be further reduced.

[0017] Further, the shaft coupling comprises a first coupling component connected with the coupling section, and a second coupling component connected with the output end of the driving component, and the first coupling component is in transmission connection with the second coupling component.

[0018] The first coupling component is fixedly connected with the coupling section, and the second coupling component is coupled with the output end of the driving component, and the split design allows the damaged components to be replaced separately, thereby reducing the maintenance cost. The first coupling component and the second coupling component can be in transmission connection in different connection modes according to different scene requirements, for example, the first coupling component and the second coupling component can be in gear meshing, coaxial embedding or locking connection.

[0019] The first coupling component is embedded in the embedding groove of the second coupling component, and is axially and radially positioned through the rigid limiting of the groove wall, so that the installation centering error is small, the embedded connection replaces the traditional flange bolt fixing, the axial installation length is reduced, and the installation requirement in a narrow space is met. The first coupling component and the second coupling component are coaxial with the transmission shaft and the output shaft of the driving component, and the driving component shaft is only subjected to the radial force, so that the driving component will not be stuck due to excessive axial force.

[0020] Further, the guide shafts are provided in two, and the two guide shafts are located on the two sides of the transmission shaft.

[0021] The two guide shafts are arranged on the two sides of the transmission shaft to form a symmetrical support structure, can offset the radial unbalanced force generated when the transmission shaft rotates or reciprocates, and reduce vibration and swing. The two guide shafts can cooperatively constrain the transmission shaft from deviating, so that local deformation or sticking caused by single-point stress is avoided.

[0022] Further, the guide hole is sleeved with a damping sleeve, and the guide shaft is arranged in the damping sleeve.

[0023] The damping sleeve is usually made of elastic materials, such as nitrile rubber, polyurethane or silica gel, and can absorb the slight vibration generated when the guide shaft moves, such as motor start-stop impact and gear meshing vibration, thereby reducing the system shaking risk. The compression deformation of the elastic material can adaptively compensate the assembly gap between the guide shaft and the guide hole, and preferentially bear the friction and wear between the guide shaft and the guide hole, thereby prolonging the overall service life.

[0024] Compared with the prior art, the utility model has the beneficial effects that:

[0025] The camera motion mechanism of the scheme designs the camera motion mechanism to fuse the precise mechanical transmission and damping and buffering technology, can realize the stable movement of the camera, prevents the shaking and abnormal sound from being generated. The transmission shaft and the guide shaft are arranged in parallel to form a space constraint system, the transmission shaft bears the function of the driving force transmission, the guide shaft provides the linear motion reference, the guide hole and the clamping groove of the support correspond to the guide shaft and the transmission shaft respectively, realize the XY plane positioning and the Z axis rotation restriction. The transmission shaft is connected with the output end of the driving part through the shaft coupling, drives the transmission shaft to rotate through the driving part to drive the slider to move axially, and then drives the camera support to move along the guide shaft. The damping pad is arranged between the slider and the clamping groove, can eliminate the gap between the two, makes the two closely fit, can effectively reduce the shaking and abnormal sound of the camera support in the moving process, and then guarantees that the camera can move stably. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the camera motion mechanism of an embodiment of the utility model (the base is separated).

[0027] Figure 2 It is an explosion view of the structure that the transmission shaft is connected with the driving part.

[0028] Figure 3 It is a structural schematic view that the support is connected with the guide shaft.

[0029] Illustration: 1, the shell, 11, the upper shell, 12, the base, 2, the support, 21, the guide hole, 22, the clamping groove, 3, the transmission shaft, 31, the threaded section, 32, the shaft coupling section, 33, the support section, 34, the first shaft sleeve, 35, the second shaft sleeve, 4, the driving part, 5, the shaft coupling, 51, the first shaft coupling part, 52, the second shaft coupling part, 521, the embedded groove, 6, the guide shaft, 7, the slider, 71, the sliding part, 72, the embedded part, 721, the limiting groove, 8, the damping pad, 81, the accommodating cavity, 9, the damping sleeve. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the utility model are given in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein.

[0031] As Figures 1 to 3As shown, the embodiment provides a camera movement mechanism, which comprises a shell 1 and a support 2 for carrying a camera, the shell 1 comprises a separable upper shell 11 and a base 12, and a space for accommodating the camera and the support 2 is formed between the two, the camera is fixed on the support 2, and the camera is extended out of the shell 1 and retracted into the shell 1 by moving the support 2. The camera movement mechanism further comprises a transmission shaft 3 rotatably arranged on the base 12, a driving member 4 capable of driving the transmission shaft 3 to rotate, and a shaft coupling 5 connecting the end of the transmission shaft 3 and the output end of the driving member 4, a guide shaft 6 is arranged in parallel on the side of the transmission shaft 3, a sliding block 7 is arranged through the transmission shaft 3, the support 2 comprises a guide hole 21 arranged through the guide shaft 6 and a clamping groove 22 embeddedly connected with the sliding block 7, a damping pad 8 is arranged between the sliding block 7 and the clamping groove 22, the damping pad 8 is made of elastic material such as nitrile rubber, polyurethane or silicone, and interference fit between the sliding block 7 and the clamping groove 22 is achieved through the damping pad 8. The driving member 4 is a driving motor, a driving motor mounting cavity is arranged on the base 12, the driving motor is locked on a motor support through screws, and then is fixedly installed in the driving motor mounting cavity, the driving motor is connected with a PCB controller through a wire harness, and the driving motor is provided with power supply and control signals through the PCB controller. In addition, the driving motor, the transmission shaft 3 and the guide shaft 6 are all installed on the base 12, the reference is unified, the cumulative error is small, and the transmission accuracy can be improved.

[0032] As shown in the figure, Figure 2 The transmission shaft 3 adopts a screw rod, which comprises a threaded segment 31, a shaft coupling segment 32 connected with the shaft coupling 5 at one end of the threaded segment 31, and a support segment 33 at the other end of the threaded segment 31. The shaft coupling segment 32 is provided with a first shaft sleeve 34 fixed on the shell 1, and the support segment 33 is provided with a second shaft sleeve 35 fixed on the shell 1. The first shaft sleeve 34 is locked on the base 12 through screws, and the second shaft sleeve 35 is pressed into the corresponding through hole of the base 12, and the two are interference fit. The first shaft sleeve 34 and the second shaft sleeve 35 form a stable support structure, provide bidirectional support for the transmission shaft 3, bear the radial load (perpendicular to the axis direction) and the axial load (along the axis direction) generated when the transmission shaft 3 rotates, and prevent the transmission shaft 3 from bending or vibrating due to uneven force. The first shaft sleeve 34 and the second shaft sleeve 35 jointly form a stable support system of the transmission shaft 3, which can effectively suppress the lateral vibration and harmonic resonance of the transmission shaft 3, and further reduce the abnormal noise and shaking by cooperating with the damping material.

[0033] As shown in the figure, Figure 2As shown, the slider 7 includes a sliding part 71 threadedly connected to the threaded segment 31, and a fitting part 72 connected to the clamping groove 22. The sliding part 71 of the slider 7 is provided with a through hole, and the inner wall of the through hole is provided with internal threads matched with the external threads of the threaded segment 31 of the transmission shaft 3, and the smoothness and quietness of the movement of the slider 7 is ensured by threaded transmission. The shock pad 8 is provided with a receiving cavity 81, and the fitting part 72 is embedded in the receiving cavity 81. The circumferential side of the fitting part 72 is provided with a limiting groove 721, and the inner wall of the receiving cavity 81 is provided with a limiting protrusion (not shown in the figure) matched with the limiting groove 721. The matching design of the receiving cavity 81 and the fitting part 72 enlarges the contact area, so that the impact force is evenly dispersed to the whole shock pad 8 through the cavity structure, avoiding local stress concentration. This design can convert high-frequency vibration into energy absorption of material elastic deformation, reducing the vibration amplitude transmitted to the equipment body. At the same time, by evenly distributing the stress, the structure of the receiving cavity 81 can delay the aging and cracking of the elastic material. The physical locking of the fitting part 72 and the receiving cavity 81 can prevent the parts from slipping or loosening due to vibration, and can effectively reduce the failure rate. The design of the limiting groove 721 and the limiting protrusion is similar to the "mortise and tenon structure", which can realize accurate alignment without complex fasteners, reduce installation errors, and effectively limit the lateral sliding of the fitting part 72 under vibration or impact.

[0034] As shown, Figure 2 The coupling piece 5 includes a first coupling component 51 connected with the coupling segment 32, and a second coupling component 52 connected with the output end of the driving piece 4, and the first coupling component 51 is in transmission connection with the second coupling component 52. The first coupling component 51 is fixedly connected with the coupling segment 32, and the second coupling component 52 is coupled with the output end of the driving piece 4. The split design allows individual replacement of damaged parts, reducing maintenance costs. The first coupling component 51 and the second coupling component 52 can be connected in different ways according to different scene requirements to realize transmission connection, such as gear meshing, coaxial embedding or locking. In this embodiment, the second coupling component 52 is provided with an embedding groove 521 on the side close to the first coupling component 51, and the first coupling component 51 is embedded in the embedding groove 521. The first coupling component 51 is embedded in the embedding groove 521 of the second coupling component 52, and the axial and radial positions are realized by rigid limiting of the groove wall, the installation centering error is small, and the embedded connection replaces the traditional flange bolt fixing, the axial installation length is reduced, and the installation demand in narrow space is met. The first coupling component 51 and the second coupling component 52 realize the coaxiality of the transmission shaft 3 and the output shaft of the driving piece 4, and at the same time make the output shaft of the driving piece 4 only bear radial force, not axial force, so that the driving piece 4 will not be stuck due to excessive axial force. In other possible embodiments, the first coupling component 51 and the second coupling component 52 can also adopt meshing connection gears, which are driven to rotate by the motor, and then drive the transmission shaft 3 to rotate.

[0035] AsFigure 3 As shown, in the embodiment, two guide shafts 6 are arranged, and the two guide shafts 6 are respectively located on the two sides of the transmission shaft 3 to form a symmetrical support structure, so that the radial unbalanced force generated when the transmission shaft 3 rotates or reciprocates can be offset, and vibration and swing can be reduced. The two guide shafts 6 can cooperatively constrain the transmission shaft 3 from deviating, so that local deformation or jamming caused by single-point stress can be avoided. The double limiting formed by the two guide shafts 6 can accurately control the linear motion track of the transmission shaft 3, and axial or radial movement can be reduced. The guide hole 21 is sleeved with a damping sleeve 9, and the guide shaft 6 penetrates through the damping sleeve 9. The damping sleeve 9 is usually made of elastic material, such as nitrile rubber, polyurethane or silica gel. Through the internal friction damping characteristics of the material itself, the small vibration generated when the guide shaft 6 moves, such as motor start-stop impact and gear meshing vibration, can be absorbed, and the risk of system shaking can be reduced. The compression deformation of the elastic material can adaptively compensate for the assembly gap between the guide shaft 6 and the guide hole 21, and at the same time, preferentially bear the friction and wear between the guide shaft 6 and the guide hole 21, thereby prolonging the overall service life.

[0036] The camera movement mechanism provided by the embodiment combines precise mechanical transmission and damping and buffering technologies, and can realize smooth movement of the camera and prevent shaking and abnormal sound. The transmission shaft 3 and the guide shaft 6 are arranged in parallel to form a space constraint system. The transmission shaft 3 bears the function of active power transmission, and the guide shaft 6 provides a linear motion reference. The guide hole 21 and the clamping groove 22 of the bracket 2 correspond to the guide shaft 6 and the transmission shaft 3 respectively, so as to realize XY plane positioning and Z-axis rotation limitation. The transmission shaft 3 is connected with the output end of the driving piece 4 through the shaft coupling 5. The driving piece 4 drives the transmission shaft 3 to rotate to drive the slider 7 to move axially, and then drives the camera bracket to move along the guide shaft 6. The damping pad 8 arranged between the slider 7 and the clamping groove 22 can eliminate the gap between the two and make them tightly fit, so as to effectively reduce the shaking and abnormal sound of the camera bracket 2 during movement, and then ensure that the camera can move smoothly.

[0037] In the description of the utility model, it is understood that the orientation or position relationship indicated by terms such as 'up', 'down', 'front', 'back', 'left', 'right','vertical', 'horizontal', 'top', 'bottom', 'inner', 'outer' and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0038] In addition, the terms "first", "second", and the like are used only for descriptive purposes and do not denote or imply relative importance or an ordered ranking of the indicated technical features. Thus, a feature defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless there is a clear specific limitation.

[0039] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A camera movement mechanism comprising a housing and a support for carrying a camera, characterized in that, The transmission shaft is provided with a threaded segment, and the sliding block is provided with a threaded sliding part connected with the threaded segment and an embedded part connected with the clamping groove.

2. The camera movement mechanism according to claim 1, characterized in that, The damping pad is provided with a containing cavity, and the embedded part is embedded in the containing cavity.

3. The camera movement mechanism of claim 2, wherein, The embedded part is provided with a limiting groove on the circumferential side, and the inner wall of the containing cavity is provided with a limiting protrusion matched with the limiting groove.

4. The camera movement mechanism of claim 3, wherein, The transmission shaft further comprises a shaft coupling segment at one end of the threaded segment and connected with the shaft coupling part, and the shaft coupling segment is provided with a first shaft sleeve fixed on the shell.

5. The camera movement mechanism of claim 2, wherein, The transmission shaft further comprises a supporting segment at the other end of the threaded segment, and the supporting segment is provided with a second shaft sleeve fixed on the shell.

6. The camera movement mechanism of claim 5, wherein, The shaft coupling part comprises a first shaft coupling component connected with the shaft coupling segment and a second shaft coupling component connected with the output end of the driving part, and the first shaft coupling component is in transmission connection with the second shaft coupling component.

7. The camera movement mechanism of claim 5, wherein, The second shaft coupling component is provided with an embedded groove on the side close to the first shaft coupling component, and the first shaft coupling component is embedded in the embedded groove.

8. The camera movement mechanism of claim 7, wherein, The guiding shafts are provided in two, and the two guiding shafts are respectively located on the two sides of the transmission shaft.

9. The camera movement mechanism of claim 1, wherein, The guiding hole is provided with a damping sleeve, and the guiding shaft is provided through the damping sleeve.

10. The camera movement mechanism of claim 1, wherein, ​

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