Zoom lenses and security cameras

Abstract

The present invention discloses a zoom lens and a security camera. The zoom lens comprises a lens barrel, a mobile carrier, a measuring device and a distance adjustment structure. The lens barrel is provided with an inner cavity. The mobile carrier is movably installed in the inner cavity along the length direction of the lens barrel. The measuring device comprises a measuring part and a matching part. The measuring part is arranged on the mobile carrier, and the matching part is arranged on the lens barrel, so that when the mobile carrier drives the measuring part to move to face the matching part, the measuring part and the matching part sense and generate corresponding signals. The distance adjustment structure connects the lens barrel and the matching part, and / or connects the mobile carrier and the measuring part, so as to adjust the distance between the measuring part and the matching part. The operation is simple and the disassembly and assembly are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of photographic equipment, and in particular to a zoom lens and a security camera. Background Art

[0002] The existing zoom lens may be provided with a magnetic sensor and a magnetic grid, and an induction signal is generated between the magnetic sensor and the magnetic grid to detect the position change. In the prior art, the distance between the magnetic sensor and the magnetic grid is generally fixed, which has an adverse effect on the detection performance. Summary of the invention

[0003] The main purpose of the present invention is to provide a zoom lens and a security camera, aiming to solve the problem of fixed sensing distance in the current zoom lens.

[0004] To achieve the above object, the present invention provides a zoom lens, comprising:

[0005] A lens barrel is provided with an inner cavity;

[0006] A movable carrier is movably installed in the inner cavity along the length direction of the lens barrel;

[0007] A measuring device, comprising a measuring part and a matching part, wherein the measuring part is arranged on the mobile carrier, and the matching part is arranged on the lens barrel, so that when the mobile carrier drives the measuring part to move to face the matching part, the measuring part and the matching part sense and generate corresponding signals; and

[0008] A distance adjustment structure is provided, wherein the distance adjustment structure connects the lens barrel and the matching portion, and / or connects the movable carrier and the measuring portion, so as to adjust the distance between the measuring portion and the matching portion.

[0009] Optionally, the measuring part and / or the matching part constitute a movable part, and the corresponding mobile carrier and / or the lens barrel constitute a fixed part;

[0010] The distance adjustment structure includes a screw rotatably mounted on the fixed part, and a first threaded hole provided on the movable part, wherein the screw is threadedly connected to the first threaded hole, so as to adjust the distance between the movable part and the fixed part by adjusting the threading depth between the screw and the first threaded hole;

[0011] The distance adjustment structure further includes a stopping portion disposed on the fixed portion, wherein the stopping portion abuts against a side wall of the movable portion to limit the movable portion from rotating inward and outward directions.

[0012] Optionally, the distance adjustment structure further includes a gasket provided between the fixed part and the movable part, and the gasket is used to adjust the distance between the movable part and the fixed part to a preset distance.

[0013] Optionally, a side wall of the lens barrel is provided with an avoidance hole along the inward and outward directions corresponding to the measuring part, and the zoom lens also includes a cover plate covering the avoidance hole, and a first mounting block is protruding from the cover plate on a side facing the measuring part, the first mounting block can pass through the avoidance hole to extend into the inner cavity, and the matching part is installed on a side of the first mounting block facing the measuring part.

[0014] Optionally, the cover plate extends from one side of the first mounting block to the side to form a connecting plate, the connecting plate is provided with connecting holes adapted to the screws, and the gasket is clamped between the connecting plate and the side wall to adjust the distance between the first mounting block and the measuring part.

[0015] Optionally, the measuring part includes a magnetic sensor, the zoom lens further includes a second mounting block, and the magnetic sensor is mounted on a side of the second mounting block facing the matching part;

[0016] The zoom lens further comprises a buckling structure, and the second mounting block can be mounted to the mobile carrier via the buckling structure.

[0017] Optionally, the mobile carrier has a mounting area for mounting the second mounting block;

[0018] The zoom lens comprises at least two first limiting portions, and the at least two first limiting portions are arranged on opposite sides of the mounting area along the length direction of the lens barrel to limit the movement of the second mounting block along the length direction of the lens barrel; and / or,

[0019] The zoom lens comprises at least two second limiting portions, and the at least two second limiting portions are arranged on opposite sides of the mounting area along the width direction of the lens barrel to limit the movement of the second mounting block along the width direction of the lens barrel.

[0020] Optionally, the zoom lens further comprises at least two buckles, at least two of the buckles are arranged on opposite sides of the mounting area along the width direction of the lens barrel, and the buckling protrusions of the two buckles are respectively protruded in directions away from each other along the length direction of the lens barrel, and the buckles are used to limit the movement of the second mounting block along the inward and outward directions of the lens barrel.

[0021] Optionally, the second mounting block is a circuit board, and the circuit board is bent in an inward and outward direction toward a side surface of the matching portion to form an electrical connection structure, and the electrical connection structure is used to connect with the electrical docking structure on the lens barrel.

[0022] The present invention further provides a security camera, comprising the above-mentioned zoom lens, wherein the zoom lens comprises:

[0023] A lens barrel is provided with an inner cavity;

[0024] A movable carrier is movably installed in the inner cavity along the length direction of the lens barrel;

[0025] A measuring device, comprising a measuring part and a matching part, wherein the measuring part is arranged on the mobile carrier, and the matching part is arranged on the lens barrel, so that when the mobile carrier drives the measuring part to move to face the matching part, the measuring part and the matching part sense and generate corresponding signals; and

[0026] A distance adjustment structure is provided, wherein the distance adjustment structure connects the lens barrel and the matching portion, and / or connects the movable carrier and the measuring portion, so as to adjust the distance between the measuring portion and the matching portion.

[0027] In the technical solution of the present invention, the measuring part is arranged on the mobile carrier, and the matching part is arranged on the lens barrel. When the mobile carrier drives the measuring part to move to face the matching part, the measuring part and the matching part sense and generate corresponding signals. The lens barrel and the matching part are connected and fixed by a distance-adjusting structure, or the mobile carrier and the measuring part are connected and fixed by a distance-adjusting structure, or the lens barrel and the matching part and the mobile carrier and the measuring part are all connected and fixed by the distance-adjusting structure, so as to adjust the distance between the measuring part and the matching part until the required sensing distance is reached. The operation is simple and the disassembly and assembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a zoom lens provided by the present invention;

[0030] Figure 2 for Figure 1 A schematic top view of a zoom lens in FIG.

[0031] Figure 3 for Figure 2 An enlarged schematic diagram of a local A in FIG.

[0032] Figure 4 for Figure 1 A schematic side view of a zoom lens in FIG.

[0033] Figure 5 for Figure 3 A plan view of the middle matching part;

[0034] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the mobile carrier;

[0035] Figure 7 for Figure 6 Enlarged schematic diagram of part B in the middle.

[0036] Description of Figure Numbers:

[0037] Label name Label name 100 Zoom lens 52 First installation block 1 Lens tube 53 Connecting plate 11 Inner cavity 531 First threaded hole 2 Mobile carrier 6 Fixed part 3 Measuring device 61 Sidewall 31 Measurement Department 611 Avoidance hole 311 Magnetic Sensor 7 Buckle structure 32 Matching Department 71 The first limiter 321 Magnetic grid 72 The second limiter 4 Adjustable distance structure 73 Buckle 41 Screws 74 Second mounting block 5 Activities Department 741 Electrical connection structure 51 Cover

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The sensing distance between the magnetic sensor and the magnetic grid in the current zoom lens has an important impact on the detection performance, but the adjustment of the sensing distance between the two is relatively troublesome.

[0043] In view of this, the present invention provides a zoom lens to solve the problem that the current sensing distance cannot be adjusted. Figures 1 to 7 This is an embodiment of the zoom lens provided by the present invention.

[0044] See also Figures 1 to 3 The zoom lens 100 includes a lens barrel 1, a mobile carrier 2, a measuring device 3 and a distance adjustment structure 4, wherein the lens barrel 1 is provided with an inner cavity 11; the mobile carrier 2 is movably installed in the inner cavity 11 along the length direction of the lens barrel 1; the measuring device 3 includes a measuring part 31 and a matching part 32, wherein the measuring part 31 is arranged on the mobile carrier 2, and the matching part 32 is arranged on the lens barrel 1, so that when the mobile carrier 2 drives the measuring part 31 to move to face the matching part 32, the measuring part 31 and the matching part 32 sense and generate corresponding signals; the distance adjustment structure 4 connects the lens barrel 1 and the matching part 32, and / or connects the mobile carrier 2 and the measuring part 31, so as to adjust the distance between the measuring part 31 and the matching part 32.

[0045] In the technical solution of the present invention, the measuring part 31 is arranged on the mobile carrier 2, and the matching part 32 is arranged on the lens barrel 1. When the mobile carrier 2 drives the measuring part 31 to move to face the matching part 32, the measuring part 31 and the matching part 32 sense and generate corresponding signals. The lens barrel 1 and the matching part 32 are connected and fixed by the distance adjustment structure 4, or the mobile carrier 2 and the measuring part 31 are connected and fixed by the distance adjustment structure 4, or the lens barrel 1 and the matching part 32 and the mobile carrier 2 and the measuring part 31 are all connected and fixed by the distance adjustment structure 4, so as to adjust the distance between the measuring part 31 and the matching part 32 until the required sensing distance is reached. The operation is simple and the disassembly and assembly are convenient.

[0046] For details, please refer to Figures 3 to 5The measuring part 31 and / or the matching part 32 constitute the movable part 5, that is, the measuring part 31 and the matching part 32 can both be the movable part 5, or one of them can constitute the movable part 5, and the corresponding mobile carrier 2 and / or the lens barrel 1 constitute the fixed part 6. In the present embodiment, the matching part 32 constitutes the movable part 5, and the lens barrel 1 constitutes the fixed part 6, so as to facilitate the adjustment of the sensing distance between the matching part 32 and the measuring part 31. The distance adjustment structure 4 includes a screw 41 rotatably mounted on the fixed part 6, and a first threaded hole 531 provided on the movable part 5. The screw 41 is threadedly connected with the first threaded hole 531. By rotating the screw 41, the threaded depth between the screw 41 and the first threaded hole 531 can be changed. In order to limit the movable part 5 from rotating following the screw 41, a stopper is added to the fixed part 6. The stopper can abut against the side wall 61 of the movable part 5. Of course, the form of the stopper is not limited. It can be the side wall 61 of the inner groove of the fixed part 6 for accommodating the movable part 5, or it can be a pin or a plurality of screws 41 to limit the movable part 5 from rotating in the inward and outward directions. There is no limitation on this. In this way, the screw 41 can be rotated so that the movable part 5 has a stroke of linear movement in the inward and outward directions along the lens barrel 1, thereby adjusting the sensing distance between the measuring part 31 and the matching part 32.

[0047] For further information, see Figures 4 to 5 The distance adjustment structure 4 also includes a gasket disposed between the fixed portion 6 and the movable portion 5. According to actual needs, a gasket of appropriate thickness can be selected to adjust the distance between the movable portion 5 and the fixed portion 6 to a preset distance.

[0048] It should be noted that if the gasket is added between the fixed part 6 and the movable part 5, the first threaded hole 531 may not be provided in the matching part 32, and the screw 41 can be threadedly connected and fixed to the fixed part 6. In this way, the sensing distance between the measuring part 31 and the matching part 32 can be adjusted by changing the thickness of the gasket.

[0049] See also Figures 2 to 5In order to facilitate the installation of the movable part 5 to the fixed part 6, a circumvention hole 611 is provided on the side wall 61 of the lens barrel 1 corresponding to the measuring part 31 along the inner and outer directions. The zoom lens 100 further includes a cover plate 51 covering the circumvention hole 611. A first mounting block 52 is provided protrudingly on a side of the cover plate 51 facing the measuring part 31. The first mounting block 52 can pass through the circumvention hole 611 to extend into the inner cavity 11. The matching part 32 is installed on a side of the first mounting block 52 facing the measuring part 31. In this way, the first mounting block 52 can be installed from the outside of the lens barrel 1, which is convenient for disassembly and assembly, so as to adjust the sensing distance between the matching part 32 and the measuring part 31.

[0050] Specifically, see Figure 3 and Figure 5 The cover plate 51 extends from one side of the first mounting block 52 to the side to form a connecting plate 53, and the connecting plate 53 is provided with a connecting hole adapted to the screw 41. The gasket is clamped between the connecting plate 53 and the side wall 61 to adjust the distance between the first mounting block 52 and the measuring part 31, so as to facilitate disassembly and assembly, so as to adjust the sensing distance between the matching part 32 and the measuring part 31.

[0051] Of course, in order to prevent the connection plate 53 from being offset when it is installed on the side wall 61, resulting in inconvenience in installation, through holes are set on the connection plate 53 and the side wall 61 to facilitate the insertion of pins for positioning, making it more convenient to install the screws 41.

[0052] Please refer to Figure 7 In one embodiment of the present invention, the measuring portion 31 includes a magnetic sensor 311, which can sense and generate a signal with a magnetic grid 321 provided on the matching portion 32 to detect position changes. The zoom lens 100 also includes a second mounting block 74, and the magnetic sensor 311 is installed on a side of the second mounting block 74 facing the matching portion 32. The zoom lens 100 also includes a snap-fit ​​structure 7, and the second mounting block 74 can be mounted to the mobile carrier 2 through the snap-fit ​​structure 7, so as to quickly install or remove the second mounting block 74.

[0053] In the present invention, the mobile carrier 2 has an installation area for installing the second installation block 74, and the zoom lens 100 includes at least two first limit portions 71, and the at least two first limit portions 71 are respectively arranged on opposite sides of the installation area along the length direction of the lens barrel 1 (please refer to Figure 7 ) to limit the movement of the second mounting block 74 along the length direction of the lens barrel 1, so as to prevent the measuring portion 31 from being unable to face the matching portion 32, resulting in inaccurate detection data.

[0054] In the present invention, the zoom lens 100 includes at least two second stopper portions 72, and the at least two second stopper portions 72 are disposed on opposite sides of the mounting area along the width direction of the lens barrel 1 to limit the movement of the second mounting block 74 along the width direction of the lens barrel 1 (see Figure 7 ) to prevent the measuring portion 31 from being unable to face the matching portion 32, resulting in inaccurate detection data.

[0055] It should be noted that the above two related technical features can be set at the same time or one of them can be set selectively. In the present embodiment, the effect of setting them at the same time is better. If they are set at the same time along the length direction and the width direction of the lens barrel 1, the second mounting block 74 cannot move along the length direction and the width direction of the lens barrel 1, so that the measuring part 31 can always be opposite to the matching part 32, the fastening is stable and reliable, and the disassembly and assembly are convenient.

[0056] Please refer to Figure 1 and 7 In order to prevent the second mounting block 74 from moving in the inward and outward direction of the lens barrel 1 when the zoom lens 100 is in working state, resulting in inaccurate detection data, the zoom lens 100 further includes at least two buckles 73, at least two of which are arranged on opposite sides of the mounting area along the width direction of the lens barrel 1, and the buckling protrusions of the two buckles 73 are respectively convexly arranged in directions away from each other along the length direction of the lens barrel 1 to limit the movement of the second mounting block 74 in the inward and outward direction of the lens barrel 1, so that the buckling is stable and reliable, and the disassembly and assembly are convenient.

[0057] Please refer to Figure 7 In one embodiment of the second mounting block of the present invention, the structure of the second mounting block 74 is in the shape of an "I" character and has four protrusions, wherein the first limiting portion 71 and the second limiting portion 72 abut against the side walls of the four protrusions, and the buckle 73 abuts against the end surface of the protrusion facing the matching portion 32, so that the buckle is stable and reliable, and the disassembly and assembly are convenient.

[0058] Please refer to 1. Figure 6 and Figure 7 In order to facilitate the installation of the second mounting block 74 and avoid installation errors, the second mounting block 74 is a circuit board. The side surface of the circuit board facing the matching portion 32 is bent along the inward and outward directions to form an electrical connection structure 741. The electrical connection structure 741 is used to connect with the electrical docking structure on the lens barrel 1. When installing the second mounting block 74, the relative position of the second mounting block 74 in the installation area can be determined according to the bent portion, and the bent portion can protect the movable carrier 2 from being stuck in the gap between the movable carrier 2 and the lens barrel 1 when moving along the length direction of the lens barrel 1.

[0059] Of course, the inductive cooperation between the measuring part 31 and the matching part 32 is not limited to the magnetic grid 321, but can also be a grating, which is similar to the above structure and will not be described in detail here.

[0060] The present invention further provides a security camera, including a zoom lens 100. The zoom lens 100 includes all the technical features of the zoom lens 100 described above, and therefore also has the technical effects brought by all the technical features described above, which will not be described one by one here.

[0061] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A zoom lens, characterized in that: include: A lens barrel is provided with an inner cavity; A movable carrier is movably installed in the inner cavity along the length direction of the lens barrel; A measuring device, comprising a measuring part and a matching part, wherein the measuring part is arranged on the mobile carrier, and the matching part is arranged on the lens barrel, so that when the mobile carrier drives the measuring part to move to face the matching part, the measuring part and the matching part sense and generate corresponding signals; and A distance adjustment structure, the distance adjustment structure connects the lens barrel and the matching portion, and / or connects the mobile carrier and the measuring portion, so as to adjust the distance between the measuring portion and the matching portion; The measuring part and / or the matching part constitute a movable part, and the corresponding movable carrier and / or the lens barrel constitute a fixed part; The distance adjustment structure includes a screw rotatably mounted on the fixed part, and a first threaded hole provided on the movable part, wherein the screw is threadedly connected to the first threaded hole, so as to adjust the distance between the movable part and the fixed part by adjusting the threading depth between the screw and the first threaded hole; The distance adjustment structure further comprises a stopper provided on the fixed portion, wherein the stopper abuts against a side wall of the movable portion to limit the movable portion from rotating in an inward and outward direction; The measuring part includes a magnetic sensor, and the zoom lens further includes a second mounting block, and the magnetic sensor is mounted on a side of the second mounting block facing the matching part; The zoom lens further comprises a buckling structure, and the second mounting block can be mounted to the mobile carrier via the buckling structure.

2. The zoom lens according to claim 1, wherein: The distance adjustment structure further includes a gasket disposed between the fixed portion and the movable portion, and the gasket is used to adjust the distance between the movable portion and the fixed portion to a preset distance.

3. The zoom lens according to claim 2, wherein: A side wall of the lens barrel is provided with an avoidance hole in the inward and outward directions corresponding to the measuring part. The zoom lens also includes a cover plate covering the avoidance hole. A first mounting block is protruded from the cover plate on a side facing the measuring part. The first mounting block can pass through the avoidance hole to extend into the inner cavity. The matching part is installed on a side of the first mounting block facing the measuring part.

4. The zoom lens according to claim 3, wherein: The cover plate extends from one side of the first mounting block to the side to form a connecting plate, and the connecting plate is provided with connecting holes adapted to the screws. The gasket is clamped between the connecting plate and the side wall to adjust the distance between the first mounting block and the measuring part.

5. The zoom lens according to claim 1, wherein: The mobile carrier has a mounting area for mounting the second mounting block; The zoom lens comprises at least two first limiting portions, and the at least two first limiting portions are arranged on opposite sides of the mounting area along the length direction of the lens barrel to limit the movement of the second mounting block along the length direction of the lens barrel; and / or, The zoom lens comprises at least two second limiting portions, and the at least two second limiting portions are arranged on opposite sides of the mounting area along the width direction of the lens barrel to limit the movement of the second mounting block along the width direction of the lens barrel.

6. The zoom lens according to claim 5, wherein: The zoom lens also includes at least two buckles, which are arranged on opposite sides of the installation area along the width direction of the lens barrel, and the buckling protrusions of the two buckles are respectively protruded in directions away from each other along the length direction of the lens barrel, and the buckles are used to limit the movement of the second installation block along the inward and outward directions of the lens barrel.

7. The zoom lens according to claim 1, wherein: The second mounting block is a circuit board, and a side surface of the circuit board facing the matching portion is bent in an inward and outward direction to form an electrical connection structure, and the electrical connection structure is used to connect with the electrical docking structure on the lens barrel.

8. A security camera, characterized in that: It is characterized in that Comprising the zoom lens as claimed in any one of claims 1 to 7.

Images