Lens external feedback device

Abstract

Relates to the field of cameras, and discloses a lens external feedback device, which comprises a holder, a supporting plate arranged at the upper end of the holder and a camera arranged on the supporting plate, and further comprises a lens external feedback device arranged on the supporting plate and connected with the camera; the zoom ring is arranged on the camera, is connected with the lens external feedback device and is used for controlling the lens external feedback device to move; the driven gear is fixedly arranged on the side, close to the camera, of the rotating shaft in a sleeving mode, the magnetic encoder device is arranged in the shell, connected with the rotating shaft and used for detecting the zoom position of the camera, and the driven gear is connected with the zoom ring in a meshed mode. According to the utility model, the magnetic encoder device transmits the zooming position to the holder, and the holder can call the preset position next time after knowing the zooming position and the storage position of the camera, thereby guaranteeing the high precision of the preset position of the camera.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to an external lens feedback device. Background Art

[0002] In my country, broadcast-level PTZ is commonly called "PTZ", and in foreign countries, it is called "robot". Because it is similar to a robot, advanced, intelligent, and can realize unmanned operation.

[0003] The existing equipment has the following disadvantages: currently on the market, the camera is controlled by the pan / tilt, and preset positions of different positions are pre-set. By calling the pan / tilt preset position command, the camera can reach the preset position, but the requirements for the camera are very high. It must be a full-servo digital camera, and ordinary cameras do not have a servo package. Although the camera zoom and focus can be controlled by the pan / tilt, the zoom position cannot be known, so the preset position cannot be set.

[0004] Therefore, the present application now proposes an off-lens feedback device to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide an off-lens feedback device to solve the above-mentioned problem that ordinary cameras do not have a servo package, and although the camera zoom and focus can be controlled through the pan / tilt, the zoom position cannot be known, and therefore the preset position cannot be set.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an off-lens feedback device, comprising a pan head, a support plate arranged at the upper end of the pan head, and a camera arranged on the support plate, and also comprising:

[0007] An external lens feedback device, disposed on the support plate and connected to the camera, for feeding back the zoom position of the camera;

[0008] A zoom ring is arranged on the camera and connected to the external lens feedback device, and is used for controlling the movement of the external lens feedback device.

[0009] Among them, the off-lens feedback device includes a shell arranged on the support plate, a rotating shaft rotatably connected to the shell through a bearing, a driven gear fixedly sleeved on the rotating shaft on the side close to the camera, and a magnetic encoder device arranged inside the shell and connected to the rotating shaft for detecting the zoom position of the camera, and the driven gear is meshingly connected to the zoom ring.

[0010] Wherein, a cover for protecting the magnetic encoder device inside the shell is arranged on a side of the shell away from the camera.

[0011] Wherein, the magnetic encoder device comprises a magnet fixed on the rotating shaft and an encoder plate fixed on the cover, and the encoder plate is magnetically connected to the magnet.

[0012] Wherein, the magnet is arranged concentrically with the encoder plate.

[0013] Wherein, a fixed shaft is fixedly arranged on the support plate, a connecting plate is fixedly arranged at a position corresponding to the fixed shaft on the shell, and the connecting plate is fixedly sleeved on the fixed shaft.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model installs a camera on a supporting plate on a pan-tilt head, the camera is electrically connected to the pan-tilt head, the pan-tilt head controls the zoom of the camera through a control unit on a chip control, and then an external lens feedback device is installed on the supporting plate, and the external lens feedback device is connected to the zoom ring on the camera. When the pan-tilt head controls the camera to zoom, the driven gear is in close contact with the zoom ring of the camera, and the rotation of the zoom ring drives the driven gear to rotate. During the rotation process, the driven gear drives the internal magnetic encoder device to move through the rotating shaft, and the magnetic encoder device transmits the zoom position at this time to the pan-tilt head, so that the pan-tilt head knows the zoom position of the camera at this time. After the position is stored, this preset position can be called next time, thereby ensuring the high precision of the camera preset position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure in one embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the connection between the lens external feedback device and the zoom ring in one embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of an external lens feedback device in one embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the explosion of the external feedback device of the lens in one embodiment of the utility model;

[0020] Figure 5 It is a schematic structural diagram of a cross-section of an external lens feedback device in one embodiment of the utility model.

[0021] In the figure: 1. pan / tilt head; 2. external lens feedback device; 21. housing; 22. cover; 23. connecting plate; 24. rotating shaft; 25. driven gear; 26. magnet; 27. encoder plate; 3. fixed shaft; 4. support plate; 5. camera; 51. zoom ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a technical solution: an off-lens feedback device, comprising a pan head 1, a support plate 4 arranged at the upper end of the pan head 1 and a camera 5 arranged on the support plate 4, and also comprising:

[0024] The external lens feedback device 2 is arranged on the support plate 4 and connected to the camera 5, and is used to feedback the zoom position of the camera 5;

[0025] The zoom ring 51 is arranged on the camera 5 and connected to the external lens feedback device 2, and is used to control the movement of the external lens feedback device 2.

[0026] It should be noted that, when working, the camera 5 is installed on the support plate 4 on the pan-tilt head 1, the camera 5 is electrically connected to the pan-tilt head 1, the pan-tilt head 1 controls the zoom of the camera 5 through the control unit on the chip control, and then the external lens feedback device 2 is installed on the support plate 4, and the external lens feedback device 2 is connected to the zoom ring 51 on the camera 5. When the pan-tilt head 1 controls the camera 5 to zoom, the zoom ring 51 on the camera 5 rotates, which will drive the external lens feedback device 2 to rotate. The external lens feedback device 2 will transmit the zoom position at this time to the pan-tilt head 1, and the pan-tilt head 1 will know the zoom position of the camera 5 at this time. After storing the position, this preset position can be called next time to ensure the high precision of the preset position of the camera 5.

[0027] In one embodiment, the external lens feedback device 2 includes a shell 21 arranged on the support plate 4, a rotating shaft 24 rotatably connected to the shell 21 through a bearing, a driven gear 25 fixedly sleeved on the rotating shaft 24 on the side close to the camera 5, and a magnetic encoder device for detecting the zoom position of the camera 5 arranged inside the shell 21 and connected to the rotating shaft 24, and the driven gear 25 is meshedly connected to the zoom ring 51.

[0028] With this design, the driven gear 25 is closely attached to the zoom ring 51 of the camera 5. The rotation of the zoom ring 51 will drive the driven gear 25 to rotate. During the rotation, the driven gear 25 will drive the internal magnetic encoder device to move through the rotating shaft 24, and the magnetic encoder device will transmit the zoom position at this time to the pan / tilt head 1.

[0029] In one embodiment, a cover 22 for protecting the magnetic encoder device inside the housing 21 is provided on a side of the housing 21 away from the camera 5 .

[0030] With this design, the magnetic encoder device is sealed inside the housing 21 and the cover 22, which can reduce the interference of external factors on the magnetic encoder device and improve the detection accuracy of the entire device and the service life of the device.

[0031] In one embodiment, the magnetic encoder device includes a magnet 26 fixed on the rotating shaft 24 and an encoder plate 27 fixed on the cover 22 , and the encoder plate 27 is magnetically connected to the magnet 26 .

[0032] Designed in this way, the encoder board 27 uses magnetic resistance or Hall elements to measure the changing angle or displacement value of the magnet 26. The change in the angle or displacement of the magnet 26 will cause a certain change in resistance or voltage. The change is amplified by the amplifier circuit, and after processing by the single-chip microcomputer, a pulse signal or analog signal is output to achieve the measurement purpose.

[0033] In one embodiment, the magnet 26 is disposed concentrically with the encoder plate 27 .

[0034] This design ensures the matching distance and concentricity requirements between the magnet 26 and the encoder plate 27, and can ensure high precision of the zoom control of the camera 5 by the magnetic encoder device.

[0035] In one embodiment, a fixed shaft 3 is fixedly provided on the support plate 4 , a connecting plate 23 is fixedly provided at a position corresponding to the fixed shaft 3 on the housing 21 , and the connecting plate 23 is fixedly sleeved on the fixed shaft 3 .

[0036] With this design, the fixed shaft 3 and the connecting plate 23 can be provided to conveniently fix the housing 21 and the supporting plate 4 , and to facilitate adjustment of the position between the driven gear 25 and the zoom ring 51 .

Claims

1. An off-lens feedback device, comprising a pan head (1), a support plate (4) arranged at the upper end of the pan head (1), and a camera (5) arranged on the support plate (4), characterized in that: Also includes: An external lens feedback device (2) is arranged on the support plate (4) and connected to the camera (5), and is used to feedback the zoom position of the camera (5); A zoom ring (51) is arranged on the camera (5) and connected to the off-lens feedback device (2), and is used to control the movement of the off-lens feedback device (2).

2. The off-lens feedback device according to claim 1, characterized in that: The off-lens feedback device (2) comprises a housing (21) arranged on the support plate (4), a rotating shaft (24) rotatably connected to the housing (21) via a bearing, a driven gear (25) fixedly sleeved on the rotating shaft (24) on a side close to the camera (5), and a magnetic encoder device arranged inside the housing (21) and connected to the rotating shaft (24) for detecting the zoom position of the camera (5), wherein the driven gear (25) is meshingly connected to the zoom ring (51).

3. The off-lens feedback device according to claim 2, characterized in that: A sealing cover (22) for protecting the magnetic encoder device inside the housing (21) is provided on a side of the housing (21) away from the camera (5).

4. The off-lens feedback device according to claim 3, characterized in that: The magnetic encoder device comprises a magnet (26) fixed on the rotating shaft (24) and an encoder plate (27) fixed on the cover (22), wherein the encoder plate (27) is magnetically connected to the magnet (26).

5. The off-lens feedback device according to claim 4, characterized in that: The magnet (26) is arranged concentrically with the encoder plate (27).

6. The off-lens feedback device according to claim 2, characterized in that: A fixed shaft (3) is fixedly arranged on the support plate (4), a connecting plate (23) is fixedly arranged on the housing (21) at a position corresponding to the fixed shaft (3), and the connecting plate (23) is fixedly sleeved on the fixed shaft (3).

Images