Windshield wiper suitable for multi-window camera

Abstract

The utility model relates to the technical field of security and protection monitoring, and discloses a windshield wiper suitable for a multi-window camera, which comprises a wiper rod part, a driving shaft and a driving assembly which are sequentially connected, and the driving assembly comprises a driving device for controlling the driving shaft to rotate and a pointer which is arranged on the driving shaft and synchronously rotates along with the driving shaft. The driving assembly further comprises a control assembly, an induction device and at least two limiting switches, every two limiting switches and the induction device form an isosceles triangle structure with the induction device as the vertex angle, and the limiting switches, the induction device and the driving device are electrically connected with the control assembly. When the pointer returns to zero, the brush rod part is vertically arranged downwards, and the brush rod part is located at the interval between every two adjacent windows. According to the windshield wiper, the pointer synchronously rotating along with the driving shaft is arranged to indicate the regular swing amplitude of the brush rod part located at the interval of the windows, and the synchronous cleaning effect of the multiple windows is achieved; the brush rod part is vertically arranged, so that dirt is not easy to accumulate and the sight of a lens is not easy to interfere.

Description

TECHNICAL FIELD

[0001] The utility model relates to the security monitoring technical field, specifically, relate to a kind of wiper for camera suitable for multiple window. BACKGROUND

[0002] Outdoor monitoring equipment is usually located at high place, for example, monitoring camera, cannot remove dust, waterlogging etc. on camera window by routine manual wiping. In sunny day, when a period of time is not cleaned lens, window will be blurred due to dust accumulation;In rainy day, if water on window cannot be removed in time, camera can not record clear picture. Therefore, outdoor monitoring equipment on the market is usually equipped with wiper, which rotates by controlling wiper close to camera lens to clean window.

[0003] The patent with publication number CN213468724U discloses a wiper device, which comprises a driving member, a gear reciprocating assembly having a gear pair, the driving member is drivingly connected with one end of the gear pair, a wiper assembly is drivingly connected with the other end of the gear pair, and the driving member drives the wiper assembly to reciprocate through the gear reciprocating assembly. The gear reciprocating assembly is connected with the driving member and the wiper assembly respectively, and the wiper assembly reciprocates through the gear reciprocating assembly. The driving member does not need to be switched forward and reverse, and a sensor is not needed to detect the position of the wiper assembly in real time.

[0004] Although the above-mentioned wiper device can clean the camera window, its structure is relatively complex and needs a large space to accommodate. According to the description in the specification, this kind of wiper device is usually used for single window cleaning. When the camera is a multiple window device, this wiper device cannot clean multiple windows at the same time. Moreover, the wiper assembly is located at the lower left corner or the lower right corner of the window and is placed obliquely. After a long time, the wiper assembly itself will become a gathering place for dust and other dirt. When the wiper assembly rotates to clean the window, it will carry these dust and dirt to the window, which will cause secondary pollution to the window. In addition, the obliquely placed wiper assembly may also affect the line of sight of the camera window. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a wiper for camera suitable for multiple window, which is vertically placed in the direction of self-weight by making the brush rod part, and realizes synchronous cleaning of multiple windows by combining with the precise positioning of the brush rod part by the pointer, and avoids the accumulation of dirt on the brush rod part, and prevents interference with the line of sight of the camera window.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A kind of rain wiper for camera suitable for multiple windows, including brush rod part, drive shaft and drive assembly connected in sequence, the drive assembly includes drive device for controlling the rotation of drive shaft, pointer arranged on the drive shaft and follow drive shaft synchronous rotation, the drive assembly further includes control assembly, sensing device and at least two limit switches, every two limit switches and sensing device form isosceles triangle structure with sensing device as top angle, the limit switch, sensing device, drive device are electrically connected with control assembly respectively;The sensing device is for sensing pointer zero, the limit switch is for sensing and limiting the rotation limit position of pointer, the control assembly indicates drive device control drive shaft positive rotation and reverse rotation by receiving the sensing signal of limit switch, and indicates drive device stop working by receiving zero signal of sensing device;When pointer is zero, the brush rod part is arranged vertically downward, and brush rod part is located at the interval between two adjacent windows.

[0008] Further, the pointer and the brush rod part are arranged in parallel.

[0009] Further, the free ends of the pointer and the brush rod part are consistent.

[0010] Further, the free end of the brush rod part is arranged vertically downward.

[0011] Further, the control assembly includes a control board, and a mounting plate is connected to the control board, the sensing device is arranged on the control board, and the drive device and the limit switch are arranged on the mounting plate, and the rain wiper is connected to the camera through the mounting plate.

[0012] Further, the drive assembly is arranged in the camera body.

[0013] Further, the drive device is a stepper motor.

[0014] Further, the sensing device is an optical coupler.

[0015] Further, the drive shaft is sleeved with a sealing ring at the position penetrating the camera body.

[0016] Further, the brush rod part includes a brush rod support and a rubber strip, and the rubber strip and the brush rod support are detachably connected.

[0017] Further, the rubber strip is pressed on the brush rod support by a rubber strip pressing plate.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1) By setting a pointer that rotates synchronously with the drive shaft, the position of the pointer is sensed by limit switches and sensing devices distributed in an isosceles triangle, thereby instructing the drive device to drive the drive shaft to make precise forward and reverse switching and stop, and controlling the brush bar located at the window interval to make regular swing amplitude, so as to achieve the synchronous cleaning effect of multiple windows.

[0020] 2) The brush rod is vertically arranged, which will not easily accumulate dirt and will not interfere with the lens view. The free end of the brush rod is vertically downward and in the same direction as the weight of the brush rod. The drive shaft does not need to lift the brush rod for a long time, which will not affect the rotation angle accuracy when cleaning the window of the brush rod later.

[0021] 3) The overall structure of the wiper is cleverly designed. By connecting it to the camera via a mounting plate, all the wiper components except the wiper arm can be built into the camera body, reducing the lever arm distance for camera tilting and eliminating the need for excessively high tilting capabilities of the camera's pan-tilt unit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the windshield wiper structure described in Embodiment 1 of this utility model;

[0023] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the connection between the windshield wiper and the camera.

[0024] Figure 3 for Figure 1 The application of the aforementioned windshield wiper on the camera is illustrated;

[0025] Figure 4 for Figure 1 The diagram shows the connection of the windshield wiper inside the camera body;

[0026] Figure 5 for Figure 1 A schematic diagram of the motor shaft of the aforementioned wiper;

[0027] Figure 6 for Figure 1 The diagram shows the structure of the wiper in another view. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] Example 1

[0030] A type of wiper for multi-view cameras, such as Figure 1 and Figure 2 As shown, the wiper includes a wiper arm 1, a drive shaft 2, and a drive assembly connected in sequence. The drive assembly includes a drive device 3 for controlling the rotation of the drive shaft 2 and a pointer 4 mounted on the drive shaft and rotating synchronously with it. The pointer 4 is fixed to the drive shaft 2 by a set screw 51. The wiper arm 1 is fixed to the end of the drive shaft 2 by a locking screw 52. The drive assembly is located inside the camera body 01, and a sealing ring 6 is fitted onto the drive shaft 2 at the position where it penetrates the camera body. The drive assembly also includes a control component 9, a sensing device 7, and two limit switches 8. The two limit switches 8 and the sensing device 7 form an isosceles triangle structure with the sensing device as the apex. The limit switches 8, the sensing device 7, and the drive device 3 are electrically connected to the control component. The sensor 7 senses the pointer 4 returning to zero, and the limit switch 8 senses and limits the rotational limit position of the pointer 4, thereby limiting the angular range of the brush rod 1's rotational swing. The control component 9 receives the sensing signal from the limit switch 8 and instructs the drive device 3 to control the forward and reverse rotation of the drive shaft 2, and receives the zeroing signal from the sensor 7 to instruct the drive device 3 to stop working. When the pointer 4 returns to zero, the brush rod 1 is arranged vertically downwards. Figure 3 The wiper of this embodiment is shown for cleaning the lens of a dual-window camera. The wiper arm 1 is located at the interval between the two windows 02 when the camera is stationary.

[0031] Camera 01 has limited body space. To save space as much as possible, such as Figure 1 and Figure 2 As shown, it is preferable to arrange the pointer 4 and the brush rod 1 in parallel, and further, the free ends of both the pointer 4 and the brush rod 1 should face the same direction, both pointing vertically downwards. This design ensures that the rotation and stopping of the pointer 4 and the brush rod 1 are completely synchronized, and the pointer 4 can accurately indicate the position of the brush rod 1.

[0032] In this embodiment, the wiper is equipped with a pointer that rotates synchronously with the drive shaft. The position of the pointer 4 is sensed by limit switches 8 and sensing devices 7 arranged in an isosceles triangle, which in turn instruct the drive device 3 to drive the drive shaft 2 to perform precise forward and reverse switching and stop. This controls the brush arm 1 located at the window interval to perform regular swinging, thereby achieving a synchronous cleaning effect for multiple windows.

[0033] Control component 9 includes a control board 91, a circuit interface located on the control board, and a mounting plate 92 vertically mounted on the control board. A sensing device 7 is mounted on the control board 91, while a drive device 3 and a limit switch 8 are mounted on the mounting plate 92. Figure 3 and Figure 4As shown, the wiper is connected to the camera body through the mounting plate 92. The circuit interface on the control board 91 is connected to the main control board of the camera 01 to realize power supply and communication control functions. The cables of the driving device 3 and the limit switch 8 are connected to the circuit interface on the control board 91 through the mounting plate 92, and the driving device and the limit switch are powered and controlled by the circuit interface.

[0034] The driving device 3 of the embodiment selects a mature stepping motor on the market, and the driving shaft 2 is a motor shaft. The stepping motor has a built-in transmission mechanism to amplify the motor output torque and realize small size and large torque. Figure 5 As shown, the two sides of the motor shaft end are milled flat structures 21, and the brush rod part 1 has an inner hole matched with the milled flat structure to assist in confirming that the circumferential angle of the brush rod part 1 is in the same orientation as the pointer when it is installed. The brush rod part 1 is connected to the motor shaft through the milled flat design and the locking screw 52. During the fixing process of the brush rod part, the brush rod part is held by hand, which can prevent the motor shaft from rotating synchronously when the locking screw is tightened, thereby avoiding damage to the internal transmission mechanism of the motor. The brush rod part is directly connected to the motor shaft, which can fully utilize the motor torque and is beneficial to completely remove the dust and rainwater on the viewfinder. It should be noted that the motor shaft end can be milled flat on one side only, or the whole end can be milled square, or other positioning and anti-rotation measures can be used.

[0035] The stepping motor with small size and large torque in the embodiment can be installed between the two lens modules inside the camera. Combined with the close cooperation of the control board and the mounting plate, the overall built-in driving assembly is realized, the appearance of the camera is increased, and the stepping motor is located between the two lenses. When the brush rod part is reset, it is arranged in the vertical self-weight direction. The driving shaft does not need to be lifted for a long time. The traditional wiper assembly is usually in the lifted state during non-working time. The wiper assembly also has a certain weight. Long-term lifting may cause wear of related supporting parts, which may cause the rotation angle to fail to reach the initial set angle standard during subsequent rotation cleaning operation, resulting in the consequence that the viewfinder cannot be completely cleaned. Therefore, the brush rod part 1 arranged in the self-weight direction in the embodiment will not affect the rotation angle accuracy of the brush rod part during subsequent cleaning of the viewfinder. The vertically arranged brush rod part 1 will not easily accumulate dirt, which can effectively avoid secondary pollution to the viewfinder. In addition, the centrally arranged brush rod part 1 will not interfere with the lens view. The brush rod part of the traditional wiper is usually stationary at the lower or upper part of the camera viewfinder, which has a greater impact on the appearance and size of the camera, and may even block the lens view. Especially when the brush rod part is at the lower part of the camera viewfinder, it will occupy the pitch space between the camera holder and the camera, increase the pitch distance of the camera, and require higher pitch ability of the holder.

[0036] The inductive device 7 of the embodiment is selected as an optical coupler, which is soldered on the control board 91. A groove 71 is formed on the optical coupler as an inductive slot for the pointer 4 to pass through when rotating. The optical coupler can precisely control the zero position of the wiper bar part 1, so that when the wiper bar part is stopped, it is always in the vertical direction when the wiper is applied to the camera with multiple view windows.

[0037] As shown in Figure 6 The wiper bar part 1 includes a wiper bar support 11 and a rubber strip 12, which are detachably connected. The rubber strip 12 is pressed on the wiper bar support 11 by a rubber strip pressing plate 13. The rubber strip can be a common boneless wiper rubber strip for the front windshield of a car, which can be cut according to the required length. Alternatively, an EVA sponge or a silica gel foaming strip can be used. The rubber strip is installed in close contact with the outer surface of the view window with a proper interference amount, so as to ensure that the wiper bar part can remove the water and dust on the view window when it swings cyclically.

[0038] The working process of the wiper of the embodiment is as follows: when the imaging quality of the camera is poor, the camera holder identifies that the impurities on the view window cause the poor imaging quality, and gives an instruction to the wiper control assembly to drive the stepping motor to rotate. The wiper bar part and the pointer rotate together with the motor shaft. When the pointer touches the left limit switch, the control assembly receives the feedback and gives a new instruction to make the stepping motor reverse rotation. When the pointer touches the right limit switch, the control assembly receives the feedback and gives a new instruction to make the stepping motor reverse rotation. This is a cycle. When the control assembly controls the wiper bar part to work for a set number of cycles (usually ten cycles), when the pointer passes through the optical coupler again, the control assembly receives the feedback and instructs the stepping motor to stop rotating. The pointer and the wiper bar part stop at the zero position coinciding with the optical coupler, i.e. the wiper bar part is stationary at the interval between the two lenses, which does not affect the normal use of the subsequent camera. When the imaging quality of the camera is poor, the camera holder identifies that the impurities on the view window cause the poor imaging quality, and the wiper is started again to work as above. If remote communication between the camera and the wiper is set, the wiper interface of the camera can also be used to manually control the wiper to work and stop.

[0039] The wiper of the embodiment has a compact structure and occupies a small space in the camera body, which does not affect the aesthetic appearance and delicate design of the camera.

[0040] Embodiment 2

[0041] The difference between the embodiment and embodiment 1 is that the camera has four view windows, and the wiper bar part is located at the interval between the middle two view windows.

[0042] Embodiment 3

[0043] The difference between the embodiment and embodiment 1 is that the pointer and the wiper bar part are arranged non-parallelly, and the orientation of the mounting plate is changed accordingly, so that the two limit switches on the mounting plate and the pointer can still form an isosceles triangle.

[0044] Example 4

[0045] The difference between this example and example 1 is that the free end of the brush bar portion is arranged vertically upwards.

[0046] Obviously, the above examples are only examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the implementation manners of the present application. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation manners. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A windshield wiper for a multi-view camera, characterized in that, The device includes a brush rod, a drive shaft, and a drive assembly connected in sequence. The drive assembly includes a drive device for controlling the rotation of the drive shaft, a pointer mounted on the drive shaft and rotating synchronously with it, and a control component, a sensing device, and at least two limit switches. Each pair of limit switches and the sensing device forms an isosceles triangle with the sensing device as the apex. The limit switches, sensing device, and drive device are electrically connected to the control component. The sensing device senses the pointer returning to zero, and the limit switches sense and limit the pointer's rotational limits. The control component instructs the drive device to control the forward and reverse rotation of the drive shaft by receiving the sensing signals from the limit switches, and instructs the drive device to stop working by receiving the zero-point signal from the sensing device. When the pointer returns to zero, the brush rod is arranged vertically downwards and located at the interval between two adjacent viewing windows.

2. The camera wiper according to claim 1, characterized in that, The pointer and brush rod are arranged in parallel.

3. The camera wiper according to claim 2, characterized in that, The free ends of the pointer and the brush rod face the same direction.

4. The camera wiper according to claim 1 or 3, characterized in that, The free end of the brush rod is arranged vertically downwards.

5. The camera wiper according to claim 1, characterized in that, The control assembly includes a control board with a mounting plate connected to it. The sensing device is mounted on the control board, and the drive device and limit switch are mounted on the mounting plate. The wiper is connected to the camera via the mounting plate.

6. The camera wiper according to claim 1 or 5, characterized in that, The drive component is located inside the camera body.

7. The camera wiper according to claim 1, characterized in that, The driving device is a stepper motor.

8. The camera wiper according to claim 1, characterized in that, The sensing device is an optocoupler.

9. The camera wiper according to claim 1, characterized in that, The brush rod includes a brush rod bracket and an adhesive strip, which are detachably connected.

10. The camera wiper according to claim 9, characterized in that, The adhesive strip is pressed onto the brush rod bracket by the adhesive strip pressure plate.

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